None that we know of. In any case prices of locally available components are far lower than cataloged parts. Just check out the RS catalog. So mail order ( very unreliable ) may be a while away. Couriered stuff is safer but more expensive. In Dollar terms cheap. In Rs terms expensive -- at the moment of course !
Cheers.
Ashok M is correct.
In the old days when ham operators were active, ham radio gear was available from all kinds of sources at very affordable prices. Unfortunately audio is perceived here as a "luxury" and we dont have the tradition here of many mfrs as do, say the UK or the US or Canada or even a small country like Denmark..This is likely to change over the next decade or so I think..
In the meantime rest assured that Delhi has a lot of sources for components, though kits and complete equipment is not available freely. I am sure Angshu who is from Delhi will be able to assist.
I usually get my kits from the US on my trips there-they are generally well designed, cheaper because the volumes in their market are good, and in most cases offer very good support by email. Also nowadays there are a lot of groups where you can get fairly unbiased feedback to guide you to take the right decision.
Anyway, along with audio, do take the opportunity to enjoy the different facets of the country during your stay here-food, culture, people, flora and fauna..
George
NP-Ladysmith-great vocals from South Africa
In the old days when ham operators were active, ham radio gear was available from all kinds of sources at very affordable prices. Unfortunately audio is perceived here as a "luxury" and we dont have the tradition here of many mfrs as do, say the UK or the US or Canada or even a small country like Denmark..This is likely to change over the next decade or so I think..
In the meantime rest assured that Delhi has a lot of sources for components, though kits and complete equipment is not available freely. I am sure Angshu who is from Delhi will be able to assist.
I usually get my kits from the US on my trips there-they are generally well designed, cheaper because the volumes in their market are good, and in most cases offer very good support by email. Also nowadays there are a lot of groups where you can get fairly unbiased feedback to guide you to take the right decision.
Anyway, along with audio, do take the opportunity to enjoy the different facets of the country during your stay here-food, culture, people, flora and fauna..
George
NP-Ladysmith-great vocals from South Africa
Caution.
For Fernmeister.
( have a
and read on ).
Some parts may be cheaper here but you might be in for a big shock. For example tubes are restamped with numbers that you want. ECC series could be any type. I once bought 6 ECC83's . They turned out to be ECC82's. To make it worse the halves would not match at all. Not even close. A dead investment.
I also got some NOS 6L6GC's and felt rather pleased. Both look brand new. Both heaters work but one is DEAD ! No physical sign of damage. There is no such thing as a return policy here !
Tubes with bakelite bases get loose or come off. I have had so many horror stories , that I stopped buying tubes locally. The types are also very limited . I buy my tubes from the US or Singapore. There are enough people travelling up and down.
Now I get tubes that work as they are supposed to and I can rely on them matching up reasonably well with my paper design . I can't understand why but NOS ECC types here are very noisy also.
Semiconductors.. LOT's of fakes. TDA2050,2030 etc -- all fakes. Even the shop keeper tells me so ! Power transistors - beware !
I am telling you all this so that you don't get too excited about lower prices. There is a price to pay ! SOME parts are genuine. Depend on your local friends to help you pick genuine stuff.
Have fun. With the right attitude it can be a great place to live in .
Cheers.
For Fernmeister.
( have a
and read on ).Some parts may be cheaper here but you might be in for a big shock. For example tubes are restamped with numbers that you want. ECC series could be any type. I once bought 6 ECC83's . They turned out to be ECC82's. To make it worse the halves would not match at all. Not even close. A dead investment.
I also got some NOS 6L6GC's and felt rather pleased. Both look brand new. Both heaters work but one is DEAD ! No physical sign of damage. There is no such thing as a return policy here !
Tubes with bakelite bases get loose or come off. I have had so many horror stories , that I stopped buying tubes locally. The types are also very limited . I buy my tubes from the US or Singapore. There are enough people travelling up and down.
Now I get tubes that work as they are supposed to and I can rely on them matching up reasonably well with my paper design . I can't understand why but NOS ECC types here are very noisy also.
Semiconductors.. LOT's of fakes. TDA2050,2030 etc -- all fakes. Even the shop keeper tells me so ! Power transistors - beware !
I am telling you all this so that you don't get too excited about lower prices. There is a price to pay ! SOME parts are genuine. Depend on your local friends to help you pick genuine stuff.
Have fun. With the right attitude it can be a great place to live in .
Cheers.
For Vivek
The shop where I purchased 6" BPL woofer is called
Bangalore Electronic Enterprises.
Hope we can get decent performance from these BPL drivers.
I saw a 5" fullrange. 6" and 8" woofers(coated paper).
Cone as well as dome(poly dome I think tweeters were available.
Regards,
Goldy
The shop where I purchased 6" BPL woofer is called
Bangalore Electronic Enterprises.
Hope we can get decent performance from these BPL drivers.
I saw a 5" fullrange. 6" and 8" woofers(coated paper).
Cone as well as dome(poly dome I think tweeters were available.
Regards,
Goldy
Conponents in India
I try and buy components manufactured by Indian manufacturers only, and found them to be quite reliable. Semiconductors from CDIL are usually not faked. Exotic stuff I usually purchase from abroad. Recently I purchased some Toshiba power transistor from Pearl electronics Bombay, I have not tested them yet so don't know whether they are fake. They look pretty genuine.
Ashok (Corbetto) says that he can still purchase ECC83 and EL84s from Jamshedpur.
The only mail order company is RS Electronics. But they are horribly expensive and ship to only businesses, but you can order any thing from their catalog.
Angshu
I try and buy components manufactured by Indian manufacturers only, and found them to be quite reliable. Semiconductors from CDIL are usually not faked. Exotic stuff I usually purchase from abroad. Recently I purchased some Toshiba power transistor from Pearl electronics Bombay, I have not tested them yet so don't know whether they are fake. They look pretty genuine.
Ashok (Corbetto) says that he can still purchase ECC83 and EL84s from Jamshedpur.
The only mail order company is RS Electronics. But they are horribly expensive and ship to only businesses, but you can order any thing from their catalog.
Angshu
Interestingly Saha capacitors used by AKSA are made right here in Hosur, near Bangalore-they are sold through some large multinational outfit, and I couldnt get a quote from their local office for Hugh! He says they are very good..
My take on getting stuff:
1. Transistors, Diodes, Mosfets: Nothing beats the OnSemi sample programme! They now have a $20 handling charge so it makes sense to club your requirement at once and order.
2. IC’s: National, TI and AD.
3. Capacitors: MKP samples for Taiwanese manufacturers. I also get from Germany (free) since we have a design company there.
4. Resistors: Local.
Fakes are real a possibiliy. Even if you are an expert, chances of getting a lemon are high. But I'm yet tp come across a fake tube. You get UOS though.
Tube and OPT’s call for special skills. Usually the shop owner who have these items, are past their retirement age. So coaxing out stuff involves delicate negotiations. Some days you are lucky - some days you are not. There was a shop, which had quite a collection. But recently when I revisited them, they bumped me off by saying that all valves are disposed off. He didn’t sound convincing though. I guess it isn’t profitable for them to stack and sell in small numbers things such as valves.
But a sure shot place for valves, OPT’s and Chokes is Calcutta. Chandni Market, Radio galli and its surroundings are a real treasure trove. But you must have solid skills to make a purchase here. Prices are usually high. I have done some of my best purchases here. EL34, GZ34, and such. Basically you have to be in alert while your are travelling around India. A couple of week ago I was in Rourkella to attend a wedding and took time off to visit the market. Just 1 hour of rummaging produced 4 nos of Phillips Miniwatt 12AT7, 2 nos of Mullard EZ81 and a pair of Buggleboy EL84. All for just Rs. 400.
Will post some pics when I get home.
George:
Saha sounds bong. Let's coax Angshu into the job 🙂
1. Transistors, Diodes, Mosfets: Nothing beats the OnSemi sample programme! They now have a $20 handling charge so it makes sense to club your requirement at once and order.
2. IC’s: National, TI and AD.
3. Capacitors: MKP samples for Taiwanese manufacturers. I also get from Germany (free) since we have a design company there.
4. Resistors: Local.
Fakes are real a possibiliy. Even if you are an expert, chances of getting a lemon are high. But I'm yet tp come across a fake tube. You get UOS though.
Tube and OPT’s call for special skills. Usually the shop owner who have these items, are past their retirement age. So coaxing out stuff involves delicate negotiations. Some days you are lucky - some days you are not. There was a shop, which had quite a collection. But recently when I revisited them, they bumped me off by saying that all valves are disposed off. He didn’t sound convincing though. I guess it isn’t profitable for them to stack and sell in small numbers things such as valves.
But a sure shot place for valves, OPT’s and Chokes is Calcutta. Chandni Market, Radio galli and its surroundings are a real treasure trove. But you must have solid skills to make a purchase here. Prices are usually high. I have done some of my best purchases here. EL34, GZ34, and such. Basically you have to be in alert while your are travelling around India. A couple of week ago I was in Rourkella to attend a wedding and took time off to visit the market. Just 1 hour of rummaging produced 4 nos of Phillips Miniwatt 12AT7, 2 nos of Mullard EZ81 and a pair of Buggleboy EL84. All for just Rs. 400.
Will post some pics when I get home.
George:
Saha sounds bong. Let's coax Angshu into the job 🙂
hi
Transducers in India – plus an article on a wide range of speaker related issues
Hi
I am a transducer design engineer in India and have a manufacturing set up in Calcutta ,
( My range of products and transducers are discussed down below like the 400 watt longthrow subwoofer )
This article has been inspired by my diy audio enthusiasm and to aid all constructors
I have constructed all types of transistorized and mosfet amps from 30 to 1000 w rms (sine) , they have mostly been elektor circuits (though I have made some audio amateur and other designs too ) , most of the pcb layout and design / construction idea has been changed by me _ for better efficiency , ease to construct , thermal and long run stability , currently I redesign pcb,s and advise circuits to aid my customers , to suit their cabinets and budget (making all components , potentiometers spk socket / input sockets ets pcb mounting )
My transducers are
1. Symmetrical field motor structure (magnet and plates design) of all types , extended pole piece and bumped or dual magnet design to allow long travels of the voice coil
2. All types of high quality paper cones , non press , semi press cones , fully pressed and
felted cones
we even design our own cones and have them manufactured to suit application
Cones developed for specific application _ subs , mids , full ranges
For eg my subwoofer’s _ nonpress paper rubber surround cones do not require a passive or active c/o it naturally rolls off at about 200 hz to absorb all mid and hi frequencies mechanically
4. kapton former and imported – eldra voice coil wires and high temp vcs
with voice coil lengths upto 60 mm and x max of 25 mm at 4 ohms
this allows the coil to remain in the magnetic gap during all instances of cone excursion
where as most manufacturers ( even the ones discussed in diy audio ) yet use short coils even in their subs resulting in the coil to leave the magnetic field when the cone moves , this would result in distortion at above 40 to 50 w rms and these speakers will always have the tendency to be inaccurate that is : the nature of sound they will produce tend to be same with all types of recording , where as deep bass should roll but punchy tracks should impact from the same driver
5. surrounds and spiders developed for long throw purposes ets
surrounds in own material – rubber and foam in own dyes in different densities , hardness and roll profiles
Power handling of my woofers are
from 30 w to :- 100 w (4 inch driver) , 30 to 150 w (5 to 6 inch driver) , 40 to 200 w (8 inch driver) , 60 to 250 w (10 inch driver) , 60 to upto 400 w (12 inch driver) w = amplifier power at sine wave rms
just in the 8 inch range and 30 to 100 w category I have 22 separate cones and different models
To cut down to basics - In a complete speaker construction procedure there are three stages :
1.determine the T/S parameters of the driver
2.run it through box design calculations / software with the cut off frequency size and type _ bandpass / bassreflex etc in mind
3.construct the box solidly assemble the speakers
then perform final measurements with a microphone plus software analysis of the speaker
upon this test result and personal taste
the crossover can be tweaked , notch filters and impedance correction put in and phase tuned
the above is nirvana but it does not include power handling , the sweetness required from hi fi speakers or the accuracy factor in professional audio / monitors
Reverting to important issues governing diy and speaker design
1 . The speaker matching with the amplifier ,
I can provide a double magnet (155 to 230 mm) subwoofer in a lambada extended pole underhung sfg topology magnet structure with a kapton voice coil with imported aluminum wire voice coil lengths in excess of 60 mm with a xmax of 25 mm at 4 ohms , a imported non-press paper rubber surround cone (which totally absorbs all mid + hi frequency due to the cone design)
and
if the user constructs the most powerful IC amp it will not match
infact it won’t match a 150 w rms transistorized design using latest Toshiba ets transistors
the reason – the magnet structure is over damped
now if it was the crescendo mosfet amp then we are going somewhere ,
Two
the type of the transducer , its power handling , has the voice coil size been increased blindly to increase power handling without magnetic efficiency and x – max in mind ?
the type of cone used , pressed paper , semi press paper , non press paper , felted composite , reinforced ets ( this decides how the speaker will sound )
the motor structure , sfg (symmetrical field geometry magnet structure) , for full range and pro drivers if there are eddy current shorting rings , other shorting rings employed to extend frequency response , linearise impedance , improve transience
the vc material and wire , the vc inductance – 2 layer , 4 layer , dual vc type etc
the suspension system and compliance
surround material , eg rubber then type natural or synthetic ets , the extent of the roll of the surround and its match with the spiders
the construction – at the end all parts of a speaker is held together by adhesives , the quality of adhesives used / and the process of manufacturing , for eg if I repair a toy with a epoxy hardener type adhesive and do not allow for the correct drying time …
at the end all manufacturers are increasing production speeds
To this end I have spent a considerable time in exploring speaker matching (helped by my audio electronics knowledge) to guide my customers
And
Our transducers are designed for its specific application with power handling and type hifi or pro audio in mind , not just a woofer cone thrown into a full-range magnet coil design as employed by other manufacturers named in a few article s , one Mumbai manufacturers drivers known to be exported do not even confirm to its t/s parameters or its power handling capacity or the Xeroxed measurements given with the driver , and their idea of a subwoofer is a four layer voice coil which due to its voice coil inductance has a lower mid/hi frequency response but come on what about this reducing the voice coil height and then we are left with the problem of the coil leaving the magnetic gap when it moves subs require a large coil winding height – thus the term long throw transducer
The above discussion generally is applicable to hi fi speakers
I am a sound reinforcement enthusiast and pro audio is too involving to make a start here
To all my friends out there who are sound engineers (me being fanatic about discos) phase and time are your enemies in multiple speaker systems
These are a few of my products in this range
I have pro audio drivers mainly amazing full ranges from 5 to 15 inch
12 and 15 inch are for sound reinforcement and pro monitors and are rated at 200 to 300 w rms
Low frequency transducers
jbl , ev , eminence type 600 w rms 15/18 inch low frequency transducers of ets
using company replacement parts
that is company : cone , edge wound voice coil , spider , dust cap , gasket – reconing kit
in my own aluminum die cast basket
with the same sfg magnet pole piece structure of the original driver
using general magnetics magnet and soft metals as used by jbl etc for their magnet plates
at amazing prices (lower than p – audio)
(this is dependant on my importing the re- cone kit but I plan to have most in my inventory all the time next year)
my own 600 w rms transducers
using imported cones and spider
own high temp aluminum wire voice coils on kapton former
sfg extended vented pole motor structure
this is also available in a dual magnet design to compensate for the tiny loss of the round wire voice coils to an edge wound one by increasing the field strength thus resulting in similar efficiencies of a edge wound voice coil driver
this is of course at a much lower price than that of the above
little about me – that is us , there are two of us , suranjan das gupta and vivek jaiswal - aka viki who are both transducer design engineers and audio electronics enthusiast ,
we can be contacted at
Suranjan Das Gupta – 9830005575
Viki Jaiswal – 033-30907825 and 033- 30912935
Hunter Audio , 77/B Amherst St , Calcutta 700009
Transducers in India – plus an article on a wide range of speaker related issues
Hi
I am a transducer design engineer in India and have a manufacturing set up in Calcutta ,
( My range of products and transducers are discussed down below like the 400 watt longthrow subwoofer )
This article has been inspired by my diy audio enthusiasm and to aid all constructors
I have constructed all types of transistorized and mosfet amps from 30 to 1000 w rms (sine) , they have mostly been elektor circuits (though I have made some audio amateur and other designs too ) , most of the pcb layout and design / construction idea has been changed by me _ for better efficiency , ease to construct , thermal and long run stability , currently I redesign pcb,s and advise circuits to aid my customers , to suit their cabinets and budget (making all components , potentiometers spk socket / input sockets ets pcb mounting )
My transducers are
1. Symmetrical field motor structure (magnet and plates design) of all types , extended pole piece and bumped or dual magnet design to allow long travels of the voice coil
2. All types of high quality paper cones , non press , semi press cones , fully pressed and
felted cones
we even design our own cones and have them manufactured to suit application
Cones developed for specific application _ subs , mids , full ranges
For eg my subwoofer’s _ nonpress paper rubber surround cones do not require a passive or active c/o it naturally rolls off at about 200 hz to absorb all mid and hi frequencies mechanically
4. kapton former and imported – eldra voice coil wires and high temp vcs
with voice coil lengths upto 60 mm and x max of 25 mm at 4 ohms
this allows the coil to remain in the magnetic gap during all instances of cone excursion
where as most manufacturers ( even the ones discussed in diy audio ) yet use short coils even in their subs resulting in the coil to leave the magnetic field when the cone moves , this would result in distortion at above 40 to 50 w rms and these speakers will always have the tendency to be inaccurate that is : the nature of sound they will produce tend to be same with all types of recording , where as deep bass should roll but punchy tracks should impact from the same driver
5. surrounds and spiders developed for long throw purposes ets
surrounds in own material – rubber and foam in own dyes in different densities , hardness and roll profiles
Power handling of my woofers are
from 30 w to :- 100 w (4 inch driver) , 30 to 150 w (5 to 6 inch driver) , 40 to 200 w (8 inch driver) , 60 to 250 w (10 inch driver) , 60 to upto 400 w (12 inch driver) w = amplifier power at sine wave rms
just in the 8 inch range and 30 to 100 w category I have 22 separate cones and different models
To cut down to basics - In a complete speaker construction procedure there are three stages :
1.determine the T/S parameters of the driver
2.run it through box design calculations / software with the cut off frequency size and type _ bandpass / bassreflex etc in mind
3.construct the box solidly assemble the speakers
then perform final measurements with a microphone plus software analysis of the speaker
upon this test result and personal taste
the crossover can be tweaked , notch filters and impedance correction put in and phase tuned
the above is nirvana but it does not include power handling , the sweetness required from hi fi speakers or the accuracy factor in professional audio / monitors
Reverting to important issues governing diy and speaker design
1 . The speaker matching with the amplifier ,
I can provide a double magnet (155 to 230 mm) subwoofer in a lambada extended pole underhung sfg topology magnet structure with a kapton voice coil with imported aluminum wire voice coil lengths in excess of 60 mm with a xmax of 25 mm at 4 ohms , a imported non-press paper rubber surround cone (which totally absorbs all mid + hi frequency due to the cone design)
and
if the user constructs the most powerful IC amp it will not match
infact it won’t match a 150 w rms transistorized design using latest Toshiba ets transistors
the reason – the magnet structure is over damped
now if it was the crescendo mosfet amp then we are going somewhere ,
Two
the type of the transducer , its power handling , has the voice coil size been increased blindly to increase power handling without magnetic efficiency and x – max in mind ?
the type of cone used , pressed paper , semi press paper , non press paper , felted composite , reinforced ets ( this decides how the speaker will sound )
the motor structure , sfg (symmetrical field geometry magnet structure) , for full range and pro drivers if there are eddy current shorting rings , other shorting rings employed to extend frequency response , linearise impedance , improve transience
the vc material and wire , the vc inductance – 2 layer , 4 layer , dual vc type etc
the suspension system and compliance
surround material , eg rubber then type natural or synthetic ets , the extent of the roll of the surround and its match with the spiders
the construction – at the end all parts of a speaker is held together by adhesives , the quality of adhesives used / and the process of manufacturing , for eg if I repair a toy with a epoxy hardener type adhesive and do not allow for the correct drying time …
at the end all manufacturers are increasing production speeds
To this end I have spent a considerable time in exploring speaker matching (helped by my audio electronics knowledge) to guide my customers
And
Our transducers are designed for its specific application with power handling and type hifi or pro audio in mind , not just a woofer cone thrown into a full-range magnet coil design as employed by other manufacturers named in a few article s , one Mumbai manufacturers drivers known to be exported do not even confirm to its t/s parameters or its power handling capacity or the Xeroxed measurements given with the driver , and their idea of a subwoofer is a four layer voice coil which due to its voice coil inductance has a lower mid/hi frequency response but come on what about this reducing the voice coil height and then we are left with the problem of the coil leaving the magnetic gap when it moves subs require a large coil winding height – thus the term long throw transducer
The above discussion generally is applicable to hi fi speakers
I am a sound reinforcement enthusiast and pro audio is too involving to make a start here
To all my friends out there who are sound engineers (me being fanatic about discos) phase and time are your enemies in multiple speaker systems
These are a few of my products in this range
I have pro audio drivers mainly amazing full ranges from 5 to 15 inch
12 and 15 inch are for sound reinforcement and pro monitors and are rated at 200 to 300 w rms
Low frequency transducers
jbl , ev , eminence type 600 w rms 15/18 inch low frequency transducers of ets
using company replacement parts
that is company : cone , edge wound voice coil , spider , dust cap , gasket – reconing kit
in my own aluminum die cast basket
with the same sfg magnet pole piece structure of the original driver
using general magnetics magnet and soft metals as used by jbl etc for their magnet plates
at amazing prices (lower than p – audio)
(this is dependant on my importing the re- cone kit but I plan to have most in my inventory all the time next year)
my own 600 w rms transducers
using imported cones and spider
own high temp aluminum wire voice coils on kapton former
sfg extended vented pole motor structure
this is also available in a dual magnet design to compensate for the tiny loss of the round wire voice coils to an edge wound one by increasing the field strength thus resulting in similar efficiencies of a edge wound voice coil driver
this is of course at a much lower price than that of the above
little about me – that is us , there are two of us , suranjan das gupta and vivek jaiswal - aka viki who are both transducer design engineers and audio electronics enthusiast ,
we can be contacted at
Suranjan Das Gupta – 9830005575
Viki Jaiswal – 033-30907825 and 033- 30912935
Hunter Audio , 77/B Amherst St , Calcutta 700009
hi
* Speakers (all spks employ imported high temp voice coil wires and other parts)
* all w = rms
Prices
6 inch , large rubber roll surround , medium compliance , extending to 50 hz , typical x max of 5 mm ,
50/60 watt - rs 200 , 80/90 watt - rs 250 to 300 , 100 watt and above depends depends on the type you want , materials etc but typically rs 450 to 700
6 inch midbass , excellent medium density foam surrounds - imported cones , with great looks in maroon (like Sony) grey etc. x - max typical 5 mm , copper and aluminum types depends on needs , cut off point , making c/o design simple and inexpensive
compliance proven to match compact enclosures of all types
prices same as above , in the wattage categories ,
dual magnet 6 inch car subs - 100 w rs 550/
8 - inch midbass , specs similar to above 6 inch midbass
prices - plus rs 50 to 100 of that of the 6 inch mid bass units
subwoofers
8 inch , 12 inch
having non-press imported cones , rubber surround , excellent bass response , these cones have a natural cutoff at around 250 hz and absorbs mid and all high frequencies , due to its mechanical designs , even when mid and hi tone controls are boosted from a tone control / equalizer
when few a full range signal (without active or passive c/o ) ,
these subwoofers are intended for all types of sub enclosure , front firing and bandpass , and they perform excellently in a tower unit improving low frequency response and cutoff point , without the use of sub amps , enclosures or expensive passive c/o designs , will perform with a 6 db c/o
all have a typical x-max of 10 mm 1 - way ,
aluminum and copper vc s depends on application and sensitivity required ,
glass fiber or kapton formers / high temp materials and adhesives
symmetrical field geometry motor structure with the coil and plates / assembled to tight tolerances , mostly are a vented - extended pole piece design
prices
8 inch
120 watt - 900 to 1100rs , depending on changeable specs
double mag 160 watt - 1500
12 inch
160 watt - 1800 to 2000 depending on specs
double mag 300 watt 2800 to 3300 , depending on specs
You can have your own models developed for you to the type you want, with the materials you would like in the voice coils etc
Such speakers will cost you more or less the same - ish as the prices of other models (the price s im sending you) as long they are in the same category
A person who is designing a system requires the speaker unit to be as part of the entire system, which will match and is suiting the system being designed ,
It is best if you specify the x-max you would like + the type of voice coil materials ets which will best suit your needs
For eg ,
a subwoofer which is intended for a sealed back bandpass enclosure , requires a high compliance suspension and a larger coil
where as a subwoofer for a dual vented bandpass enclosure requires a stiffer suspension and a shorter coil ,
I can make you , one for a sealed bandpass one for a dual vented bandpass ,
Where the basic model as far as the looks are concerned or the power handling ets remains the same
suranjan
transducer design engineer
* Speakers (all spks employ imported high temp voice coil wires and other parts)
* all w = rms
Prices
6 inch , large rubber roll surround , medium compliance , extending to 50 hz , typical x max of 5 mm ,
50/60 watt - rs 200 , 80/90 watt - rs 250 to 300 , 100 watt and above depends depends on the type you want , materials etc but typically rs 450 to 700
6 inch midbass , excellent medium density foam surrounds - imported cones , with great looks in maroon (like Sony) grey etc. x - max typical 5 mm , copper and aluminum types depends on needs , cut off point , making c/o design simple and inexpensive
compliance proven to match compact enclosures of all types
prices same as above , in the wattage categories ,
dual magnet 6 inch car subs - 100 w rs 550/
8 - inch midbass , specs similar to above 6 inch midbass
prices - plus rs 50 to 100 of that of the 6 inch mid bass units
subwoofers
8 inch , 12 inch
having non-press imported cones , rubber surround , excellent bass response , these cones have a natural cutoff at around 250 hz and absorbs mid and all high frequencies , due to its mechanical designs , even when mid and hi tone controls are boosted from a tone control / equalizer
when few a full range signal (without active or passive c/o ) ,
these subwoofers are intended for all types of sub enclosure , front firing and bandpass , and they perform excellently in a tower unit improving low frequency response and cutoff point , without the use of sub amps , enclosures or expensive passive c/o designs , will perform with a 6 db c/o
all have a typical x-max of 10 mm 1 - way ,
aluminum and copper vc s depends on application and sensitivity required ,
glass fiber or kapton formers / high temp materials and adhesives
symmetrical field geometry motor structure with the coil and plates / assembled to tight tolerances , mostly are a vented - extended pole piece design
prices
8 inch
120 watt - 900 to 1100rs , depending on changeable specs
double mag 160 watt - 1500
12 inch
160 watt - 1800 to 2000 depending on specs
double mag 300 watt 2800 to 3300 , depending on specs
You can have your own models developed for you to the type you want, with the materials you would like in the voice coils etc
Such speakers will cost you more or less the same - ish as the prices of other models (the price s im sending you) as long they are in the same category
A person who is designing a system requires the speaker unit to be as part of the entire system, which will match and is suiting the system being designed ,
It is best if you specify the x-max you would like + the type of voice coil materials ets which will best suit your needs
For eg ,
a subwoofer which is intended for a sealed back bandpass enclosure , requires a high compliance suspension and a larger coil
where as a subwoofer for a dual vented bandpass enclosure requires a stiffer suspension and a shorter coil ,
I can make you , one for a sealed bandpass one for a dual vented bandpass ,
Where the basic model as far as the looks are concerned or the power handling ets remains the same
suranjan
transducer design engineer
suranjan!
Interesting long techno-marketing post i would say..!
btw Where should i hunt for these..!! 😛
Who distributes ur products..? Brandname..?
is it availabel in blr..?
Would be interested in the details..!
ajju
Interesting long techno-marketing post i would say..!
btw Where should i hunt for these..!! 😛
Who distributes ur products..? Brandname..?
is it availabel in blr..?
Would be interested in the details..!
ajju
We need to draw a line____________
Hi Sangram,
Thanks for your long illuminating posts. I'm sure many people would find something new in it.
Now that we have seen this for some time ,
we would find it a bit troublesome putting all the "if this then that" selection to pick a driver.
You are the only speaker manufacturer I know of ( or is that custom manufacturer ?) who offers so many variables that the customer could possibly swoon before ordering.
To get customers keep it short! REAL short .
Make some drivers that you think will sell and publish the specs and ONE fixed price. You should get some buyers. Then you can improve from there based on feedback.
Don't say , here are a million combinations , I can do them all , what do you want ?
Today is gone tomorrow. There isn't much time to keep focussed while you make the customers ultimate speaker . You should be charging Mega bucks for that kind of service.
I suggest you collect the informed DIY'ers specs ( by request ) and make at least ONE 6 inch, 8 inch , 10 inch and 12 inch driver and measure its parameters and post the results with pictures on the forum. Remember that making several drivers to match up to a set of specs is not EASY. The buyer however will demand that.
See what some people had to say about Peerless driver specs. That statement however does not apply to all their drivers.
With your limited resources would you be able to guarantee the performance of all drivers supplied ? If you can that would be great. With established and reputed manufactures offering great drivers , you would have to be much cheaper to make any serious sale. I do hope you see all of this. From your posts this was not apparent. So if I am telling you what you all ready know , sorry for wasting your time. If you do see the light , we are still here to support your efforts.
Cheers.
Hi Sangram,
Thanks for your long illuminating posts. I'm sure many people would find something new in it.
Now that we have seen this for some time ,
we would find it a bit troublesome putting all the "if this then that" selection to pick a driver.
You are the only speaker manufacturer I know of ( or is that custom manufacturer ?) who offers so many variables that the customer could possibly swoon before ordering.
To get customers keep it short! REAL short .
Make some drivers that you think will sell and publish the specs and ONE fixed price. You should get some buyers. Then you can improve from there based on feedback.
Don't say , here are a million combinations , I can do them all , what do you want ?
Today is gone tomorrow. There isn't much time to keep focussed while you make the customers ultimate speaker . You should be charging Mega bucks for that kind of service.
I suggest you collect the informed DIY'ers specs ( by request ) and make at least ONE 6 inch, 8 inch , 10 inch and 12 inch driver and measure its parameters and post the results with pictures on the forum. Remember that making several drivers to match up to a set of specs is not EASY. The buyer however will demand that.
See what some people had to say about Peerless driver specs. That statement however does not apply to all their drivers.
With your limited resources would you be able to guarantee the performance of all drivers supplied ? If you can that would be great. With established and reputed manufactures offering great drivers , you would have to be much cheaper to make any serious sale. I do hope you see all of this. From your posts this was not apparent. So if I am telling you what you all ready know , sorry for wasting your time. If you do see the light , we are still here to support your efforts.
Cheers.
hey ashok ... dont forget a full range / wide range too 🙂 just kidding. i agreew ith ashok. concentrate on a few drivers (5 would be nice) and do them well.
a 1" dome, 6" cone, 8" cone, 12" cone and maybe a 4-5" wide range.
a 1" dome, 6" cone, 8" cone, 12" cone and maybe a 4-5" wide range.
Yes, I agree with ashok and navin. If you can give the DIY community some good drivers to choose from, you should be able to sell quite a few. Needless to say, Indian DIYers are hungry for some good, international quality drivers.
hunter audio
hey navin u are rite and so are ashok .... i think u shud give and advertise a few of u'r standard drivers. i wud deffinately go for them .... u in calcutta na.
Binil
hey navin u are rite and so are ashok .... i think u shud give and advertise a few of u'r standard drivers. i wud deffinately go for them .... u in calcutta na.
Binil
Hi Suranjan
I may be interested in a couple of passive radiators if you can make them. Dia 15inch, to mate with a sub driver that I ordered from the US. I will give you more specs after hearing from you. Compared to drivers these are, as you may be aware, much simpler.
George
I may be interested in a couple of passive radiators if you can make them. Dia 15inch, to mate with a sub driver that I ordered from the US. I will give you more specs after hearing from you. Compared to drivers these are, as you may be aware, much simpler.
George
Making ones own passive radiator.
George,
I have come across a shop selling all kinds of cones , frames and spiders - amongst other driver parts.
Should be easy to rig up ones own. Some amount of experimenting will be necessary. Can't say if it can be made to meet specs that you want.
I saw a 15 inch locally made woofer yesterday. Cost is Rs2500/- . It sounds awful and has a very high resonance . Corrugated cloth surround and a paper cone. This I was told is better than the rest !!!!!!!!!!!!!!!
Pathetic, but lots of people seem to be buying them !
There seems to be a market for everything.
Cheers.
George,
I have come across a shop selling all kinds of cones , frames and spiders - amongst other driver parts.
Should be easy to rig up ones own. Some amount of experimenting will be necessary. Can't say if it can be made to meet specs that you want.
I saw a 15 inch locally made woofer yesterday. Cost is Rs2500/- . It sounds awful and has a very high resonance . Corrugated cloth surround and a paper cone. This I was told is better than the rest !!!!!!!!!!!!!!!
Pathetic, but lots of people seem to be buying them !
There seems to be a market for everything.
Cheers.
gjo said:
These Saha guys have collaborated with Sprague. Apparently been in business since 1954 and one of the biggest makers of Caps in the world. Check their site http://www.susco.com.
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