ashok said:
Besides they dont come with reliable specs. while one might not use the paper specs to design a speaker one must trust them enough to know if the driver is worth investing in. one reason to try only drivers used by others.
tcpip said:
They say SR19DT - hence, they are SR19DT's.
http://cgi.ebay.com/Peerless-SR-19D...oryZ3276QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
I have four pairs, so I'm happy to know that they're not bad.
The woofers are these:
http://cgi.ebay.com/Peerless-Acoust...oryZ3276QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I just bought another six woofers - they only cost me $45 total!
Some 2-ways would be great.
I'm glad you like them. I'm quite certain they are not the SR10DT drivers we know in India. Therefore, all my previous comments about the SR10DT are inapplicable here.Spasticteapot said:
I'm curious: how did you know these were made by Peerless India? The label on the rear seems to to say Peerless Acoustics, and the artwork for that label is different in every respect from the Peerless India labels.
Good for you. 🙂
All my comments above, about these probably not being by Peerless India, apply here too.
tcpip said:
http://www.mindspring.com/~audiolab/peerlspc.htm
http://www.diyaudio.com/forums/showthread.php?threadid=57652&highlight=
This says otherwise.
Now that I have the T/S parameters (I'm pretty sure I have the paper version, not the poly version in both cases) for these drivers, I can start designing boxes for them.
I hope the specs for the SR19DT, whatever that is, are correct. I glanced at the specs for the SR10DT, and if they are referring to the same driver which we buy in Bombay, then their specs are not right: the Fs I've seen here, over and over is about 2K, not 1.5K as they say.Spasticteapot said:
Also, I read the audiolab Webpage and the diyaudio thread you pointed me to, but there is no evidence in either of those places to identify the drivers you have as Peerless India drivers. The audiolab page mentions "Peerless Fabrikkerne". Those words are seen on each and every Peerless India driver's label that I've seen (and I've seen a few dozen by now). But your drivers have a totally different legend and a different-looking label. Therefore, I still am not sure how you concluded that the drivers you have are made by Peerless India.
Anyway, happy building. 🙂 The drivers you have could be every bit as good as, perhaps better than, the ones I know from Peerless India, so it won't affect your speaker's quality.
Just curious... why did you buy these drivers? It appears that you bought them in the USA. Aren't there other excellent, well-studied, well-documented drivers available there for similar prices? As I said, I'm not criticising your choice, just curious. 🙂
tcpip said:
Not really, no. The cheapest of the cheap drivers retail at about $15-$25 each; I paid $10 for the KO130's, $7.50 for the SKO130's, and $5 for the SR19DTs.
Hopefully, I'll be able to find someone with a woofer tester that can figure out the exact specs of these things.
I have been using the SR10DT and the SKO130 drivers in a pair of small bookshelves for some years now. They are hooked to my computer via an amplifier. For the price, they are great I must say.
Vivek said:
Details, please? Do you have the poly or paper versions? (The poly versions look very similar - however, they have a different impeadance for some inexplicable reason.)
Where did you buy them from? I too knew about the SKO130 in the Indian market, but I am so uncertain about the matching of the Indian items with the ones bought by Spasticteapot that I didn't bring it up.Vivek said:
The GR Research M130 is supposed to have been based on the SKO130, but you can't find any visual similarity between what they sell at GR Research and the SKO130 in the Bombay market. Seeing all this, I decided not to pitch in. 🙂
I bought them from Torvin in Chennai long back. They have stopped selling them now but I think some shop in Mumbai does.
Is thread still alive guys ?? was realy intresting to read all the stuff u talked about .true guys no good sounding drivers in India. 10 years back i managed to get hands on two 8 inch drivers named (Axiom) from chandni chowk from the dealor of Bolton in that market ...in 2006 went there to get some more he said two brothers were making them and they were from kolkatta and were back there..woofers were cast basket the first i have ever seen a basket drivers in india...I will be getting my hands on the peerless india drivers soon and hope they sound tru...the real problem is that no indian manufacturer is i think wiling to make good drivers not as the material is not present in india i think its due to lack of knowledge in ppl about a good sounding drivers or a speaker box. i wish good days come to india too drivers of realy good quality get made here and in reach of DIYers
Hi guys. I have had some experience with some indian drivers and measured their T/S parameters. The production consistency of most drivers is next to nil. But nevertheless, I found a Bolton driver exceptionally good sound wise. It was the IMW22 or something with a polypropylene cone (60 watts rms is the stated rating). The roll off that I had measured on it on the upper side was almost like a 12db/octave filter with a crossover of around 4K. Moreover the response below 4K is quite linear. That means you can use the driver without a low pass filter. The lack of the low pass filter which would necessarily have an inductor coil (and thus some resistance, spoiling the damping factor) would help in controlling the bass response (tightness as some say). I have designed a couple of speakers using this driver and peerless tweeters, and they do sound great (apne muh miya mithhu, but I think they do sound very good). Though I have had loads of problems with porting the speakers using these speakers. They sound very good in a sealed. They are supposed to be used in 100L sealed enclosures. Thats the best bet, I guess. Unfortunately Bolton has stopped manufacturing them!!!!!!!!!! Anyone has any experience with bolton speakers.
Regards.
Regards.
Yes, many of us have used 16SJW22 (IIRC) and the like. They are like the inexpensive no-brand drivers sold by Parts Express for the replacement market. Consistency of parameters is quite unstable. Now, with the original founder J S Monga passing away, I don't know what's happening with their production plans. There are a few members of this site who have designed and built speakers using Bolton midbass drivers.akshay said:
Indian speaker manufacturers are of two types: those which make drivers for the replacement market (e.g. Bolton), and those which make for exports (e.g. Peerless India). The former category may have flaky quality, but the latter are totally up to international standards.kamal6767 said:
However, DIYers have a separate problem: there are no sellers for components and parts for DIY (i.e. retail, small volume) customers. This problem is unlikely to go away, and it's not unique to India. Other than North America, the EU, and perhaps Australia, I do not know how many other countries have a thriving DIY components and drivers market. I'm almost certain that most countries do not have good speaker driver manufacturers.
Therefore, I feel we in India should expect the DIY difficulties to continue. It's just a case of market forces. In fact, I'll go a step further and say that most countries (other than that exception list I mentioned earlier) have very poor choice of sellers selling finished audio systems of high quality. The market for such systems is simply not large enough.
Hi, how are the wavecor drivers? They look well built but the midbasses seem to have slightly high-ish resonant frequencies.
Vivek
Vivek
Hello Tarun (tcpip)
I totaly agree with u what u have written i have been though this for years now. i remember when i was in college in 1985 in a sall town called Moga in Punjab people at that time didnt even know what was a woofer i mean the shop retailers there were just full range speakers and i asked the shopkeeper when he goes to Delhi he should ask for Philips woofers and bring two.He did bring me the philips woofers of philips and they were of 16 ohms and i didnt had a powerfull enough amp to run them. I was reading navins comments on some threads how built his first amp and first cassette deck in smaller classed or grades in his school time. Reminded of me of my days and i had done the same. But yes there is a good market for DIYers in India and that has to be explored by someone and there has to be someone good who can work on this and come up a winner and others follow. The basic is that people have no good knowledge about drivers and their specs. Talking about me i never knew what a good bracing was in a speaker cabnet. saw Asawaris and realized what it meant and what 'dead' enclosure meant had never thought on that before. many times the dream died in me for building a good music system for myself. But as i came to know about the peerless people i think it is posible that i would be able to make a good one for myself. It may be a litle light in the darkness if some people make a plan to import drivers and in regular supply and through advertisement in local daily news papers all over india for DIYers may be this might click in Indian and in no time that person becomes very famous may be its a sleeping giant that no one has ever tried to wake it up..may be i am overanqsious may be something else but i want to see good stuff in India just like people in US EU, aus and other countries and more choices. i know if companies are selling few of their products and they come up with a plan to sell loose stuff, i am sure there will be plenty of guys who will be coing up as DIYers and i know that we are some lucky guys to find sites like this and paste our views and how many are lucky like this who have internet and this privelage..i have been using net since 2001 and i never came through this site may be say my luck or something else but i realy am happy to know that even if i am not able to get some good stuff from abroad i know that at least one place has the thing that i need that is as good as international stuff. Thanks to Asawaris and Tarun again for i think many would have clinched their thirst for true world class drivers that he found out in the form of Peerless drivers.
I totaly agree with u what u have written i have been though this for years now. i remember when i was in college in 1985 in a sall town called Moga in Punjab people at that time didnt even know what was a woofer i mean the shop retailers there were just full range speakers and i asked the shopkeeper when he goes to Delhi he should ask for Philips woofers and bring two.He did bring me the philips woofers of philips and they were of 16 ohms and i didnt had a powerfull enough amp to run them. I was reading navins comments on some threads how built his first amp and first cassette deck in smaller classed or grades in his school time. Reminded of me of my days and i had done the same. But yes there is a good market for DIYers in India and that has to be explored by someone and there has to be someone good who can work on this and come up a winner and others follow. The basic is that people have no good knowledge about drivers and their specs. Talking about me i never knew what a good bracing was in a speaker cabnet. saw Asawaris and realized what it meant and what 'dead' enclosure meant had never thought on that before. many times the dream died in me for building a good music system for myself. But as i came to know about the peerless people i think it is posible that i would be able to make a good one for myself. It may be a litle light in the darkness if some people make a plan to import drivers and in regular supply and through advertisement in local daily news papers all over india for DIYers may be this might click in Indian and in no time that person becomes very famous may be its a sleeping giant that no one has ever tried to wake it up..may be i am overanqsious may be something else but i want to see good stuff in India just like people in US EU, aus and other countries and more choices. i know if companies are selling few of their products and they come up with a plan to sell loose stuff, i am sure there will be plenty of guys who will be coing up as DIYers and i know that we are some lucky guys to find sites like this and paste our views and how many are lucky like this who have internet and this privelage..i have been using net since 2001 and i never came through this site may be say my luck or something else but i realy am happy to know that even if i am not able to get some good stuff from abroad i know that at least one place has the thing that i need that is as good as international stuff. Thanks to Asawaris and Tarun again for i think many would have clinched their thirst for true world class drivers that he found out in the form of Peerless drivers.
Nice to see your optimism. 🙂kamal6767 said:
But my comments about Indian DIY community being very tiny still hold.
For years and years, I've heard Indian DIYers complaining about how it's impossible to build speakers in India because of the lack of parts. I built and documented the Asawari two years ago. Since then, how many DIYers do you think have built copies of the Asawari?
Answer: zero.
The community is really very small.
Hi Tarun
Well i have diffrent opinion on this. My views are that the community is realy big because we Indians are so much lovers of music and i believe that there are lots and lots of people who want to go ahead and build their own equipment if some help is provided to them. I think the lack of knowledge in most of DIYers wanters in India such as crossover designing what capacitors and coils do or what part they play lack of knowledge of cabnet building. Internet access and formost access to sites like these where they can get enthusiasm from. I had the dream of building good quality speakers since 1984. My mother who worked as a Nurse in Middle east (yemen) in 1985 bought me a pair of 10 inch drivers i dont know the make cus it was not there just some numbers. They had great sound i had them put in a ready made cabnet that were available in those days made of thin plywood and they sounded so good and yes the box use to crumble and make sounds. I burnt them overfeeding them from a amp that i had built in those times a readymade plate amp that had a big STR on it and used to run on 24-0-24 transformer. was heart broken when they were burnt since then i have been looking for building a good set of speakers and yes i visited this site accidently and came to your asawaris that gave my soul a 'amrit jal' and that desire again is back to build good speakers cus i now know that good speakers are available now. may be anyone didnt copy Asawaris and no one made them but they are a light in the darkness for me. I wont be copying them cus i have my own imaginations of cabinet that i will have and colour but yes i will be on the same concept. i will use the same drivers and same cross over(if i am able to built xo). Its not that disagree with ur view you might be right in ur views but i have my views for the community is not large but its there. For some one to explore it only time will tell. Lets hope for the best for us that in future these big audio speaker companies realize that selling parts can also bring them good business and we DIYers have more options of parts as the people in west have.
Tarun the air coils that are used in the xo how do you grade the copper wire here is there some special wire to wind these coils? A person used to wind my transformer (UPS) and had a small setup of widing parts and coils used in telephone. Can he do the job of widing the coil for my requirement. any speacial wire needed?
Well i have diffrent opinion on this. My views are that the community is realy big because we Indians are so much lovers of music and i believe that there are lots and lots of people who want to go ahead and build their own equipment if some help is provided to them. I think the lack of knowledge in most of DIYers wanters in India such as crossover designing what capacitors and coils do or what part they play lack of knowledge of cabnet building. Internet access and formost access to sites like these where they can get enthusiasm from. I had the dream of building good quality speakers since 1984. My mother who worked as a Nurse in Middle east (yemen) in 1985 bought me a pair of 10 inch drivers i dont know the make cus it was not there just some numbers. They had great sound i had them put in a ready made cabnet that were available in those days made of thin plywood and they sounded so good and yes the box use to crumble and make sounds. I burnt them overfeeding them from a amp that i had built in those times a readymade plate amp that had a big STR on it and used to run on 24-0-24 transformer. was heart broken when they were burnt since then i have been looking for building a good set of speakers and yes i visited this site accidently and came to your asawaris that gave my soul a 'amrit jal' and that desire again is back to build good speakers cus i now know that good speakers are available now. may be anyone didnt copy Asawaris and no one made them but they are a light in the darkness for me. I wont be copying them cus i have my own imaginations of cabinet that i will have and colour but yes i will be on the same concept. i will use the same drivers and same cross over(if i am able to built xo). Its not that disagree with ur view you might be right in ur views but i have my views for the community is not large but its there. For some one to explore it only time will tell. Lets hope for the best for us that in future these big audio speaker companies realize that selling parts can also bring them good business and we DIYers have more options of parts as the people in west have.
Tarun the air coils that are used in the xo how do you grade the copper wire here is there some special wire to wind these coils? A person used to wind my transformer (UPS) and had a small setup of widing parts and coils used in telephone. Can he do the job of widing the coil for my requirement. any speacial wire needed?
I'm really happy for you.kamal6767 said:
Anyone can build coils for xo, provided he uses thick single-strand enamelled copper wire (at least 16-18 SWG, IMHO, 20 SWG is too thin) and has a rig to measure small values of inductance accurately (e.g. starting with 0.1milliHenry). Remember, all the xo coils are air-core, while most coils made for other power electrical apps are iron core or other solid-core.
I got my larger coil made by Corrson, and the smaller 220uH coil made by a local Bombay chap who makes transformers. He did not have any means to measure inductance, so I calculated the number of turns needed on his bobbin size, then afterwards measured the coil myself and removed a few turns to bring the inductance down from 250uH to 220uH.
I would suggest that you just get your coils done from Corrson if you can afford their prices. They use 17 SWG copper, and you must remember to ask them for 0.22 milliHenry, not 220 microHenry. In my time, they had said they could not do micro-Henry coils, and when I later asked "Can you do 0.22 milliHenry?" they said "Sure". So they may be a bit confused in such matters.
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