Try googling "solo 103", a small project for fostex fe103, there is the description and the scheme of a notch filter. Change the values accordingly to what written here and you're done. Try to buy good components, or you'll ruin the sound.
Ciao
Great, thank you bonzo, I get it now! Did you experience the same issue with this driver and did the filter help?
🙂 me too, although I've a couple of hours of rasping to do before I can hear these things properly.
I'm so easily excited.
If the consensuses is that these drivers sound good in Zigmahornets, I'll have to buy and build .... again.
If the consensuses is that these drivers sound good in Zigmahornets, I'll have to buy and build .... again.
Smaller boxes?
Good evening,
I've been listening to these drivers for 3 years now in Zigma enclosure and I really enjoy them, but it's time for me to build a smaller enclosure (BR/Onken?).
Any suggestion for a suitable one? Maybe something I can use for my fostex fe103 too?
Dave, any help from Planet 10? 😀 😉
Good evening,
I've been listening to these drivers for 3 years now in Zigma enclosure and I really enjoy them, but it's time for me to build a smaller enclosure (BR/Onken?).
Any suggestion for a suitable one? Maybe something I can use for my fostex fe103 too?
Dave, any help from Planet 10? 😀 😉
Mine arrived from Hong Kong to Vancouver, BC in ten days via dhl. $21 in duties and brokerages were payable on delivery.
Hello, I remember reading a Nelson Pass post somewhere which implied a filter would behave differently in series to a driver fed from a tube amp. Is your filter appropriate for tube amps?
Hope so, I have these parts around already.
Have also noticed these little drivers clean up nicely if actively high passed; even taking the load off from 300 hz helps a lot.
my take on the cheep knock offs????or not
using these speakers was a result of another project i started
a siliconray tube amp my first audio build
not knowing a hole lot about the old valve
but needed a speaker to suit within my limited budget sooooo EBAY
i think they were around $80 shmackers aust deliverd and looked great
so didnt know anything about design/building speakers
a quick bit of googling and found a very simple base reflex calculator and some one that was making speakers out of PVC pipe
not knowing a lot about anything the pipes style looked cool so i adopted it i managed to get my hands on some 150mm sewer pipe and boom
using these speakers was a result of another project i started
a siliconray tube amp my first audio build
not knowing a hole lot about the old valve
but needed a speaker to suit within my limited budget sooooo EBAY
i think they were around $80 shmackers aust deliverd and looked great
so didnt know anything about design/building speakers
a quick bit of googling and found a very simple base reflex calculator and some one that was making speakers out of PVC pipe
not knowing a lot about anything the pipes style looked cool so i adopted it i managed to get my hands on some 150mm sewer pipe and boom
Attachments
build and first impressions
as per the base reflex calc i needed 13 liter ported after reading this thread im not sure this is optimum anyway with all the pipe and fittings i was using worked out the literage as best as i could
glued all together and sanded and primed port and speaker holes were filled with
19 mm MDF i angled out the inside of the speaker cutout
by the way i dont have the neo version of this speaker
this project has stalled as im a do er of many projects at once but i feal this will
be a reignitor of this project as is i havent even fired up my amp yet
i had put about 10 hours into these with a cass D sure amp they sound ok they still need to loosen up i think when i move further with this project i will post more
im keen however to see others designs and hearing experiences
as per the base reflex calc i needed 13 liter ported after reading this thread im not sure this is optimum anyway with all the pipe and fittings i was using worked out the literage as best as i could
glued all together and sanded and primed port and speaker holes were filled with
19 mm MDF i angled out the inside of the speaker cutout
by the way i dont have the neo version of this speaker
this project has stalled as im a do er of many projects at once but i feal this will
be a reignitor of this project as is i havent even fired up my amp yet
i had put about 10 hours into these with a cass D sure amp they sound ok they still need to loosen up i think when i move further with this project i will post more
im keen however to see others designs and hearing experiences
Attachments
Looks very cool. I think you may have built yourself and accidental mass loaded transmission line (AMLTL). The port looks a little on the small side and that may be what is limiting your bass. Put some pillow stuffing in the upper third to half to reduce resonances.
What is the port dia and length you are using? A good rule of thumb is the port cross sectional area should be about 1/3 the area of the cone. Then set the length based on tuning. It appears to have quite a low fs which is good. Set the tuning freq just at of little below fs - say 60 Hz. What is the length of the pipe from driver face to bottom at base?
One thing you may be getting is a loss of bass due to baffle step loss as the area around the driver is small. You will need a baffle step compensation circuit to reduce the highs to balance with the bass. Probably a 0.8mH + 4 ohm resistor in parallel to start with and see if that helps.
What is the port dia and length you are using? A good rule of thumb is the port cross sectional area should be about 1/3 the area of the cone. Then set the length based on tuning. It appears to have quite a low fs which is good. Set the tuning freq just at of little below fs - say 60 Hz. What is the length of the pipe from driver face to bottom at base?
One thing you may be getting is a loss of bass due to baffle step loss as the area around the driver is small. You will need a baffle step compensation circuit to reduce the highs to balance with the bass. Probably a 0.8mH + 4 ohm resistor in parallel to start with and see if that helps.
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Hi Goodlagger,
thank you for posting here your project, I'm trying to collect all the data and experiences on these drivers in this thread.
I think they are fine drivers, and that they are really enjoyable with low power amps.
I tried them in zigmahornet enclosure and I loved them immediately.
They go low, I mean really low, much lower than Fostex fe103. They don't have the same beautiful midrange, but they have a lot less of Fostex's shortcomings in upper and lower register.
I tried them wit chipamp (lm3886), D amp (Fenice 2024), and now tube amp (dual mono ecl86 single ended triode, no compromise diy version!).
With every amp they sounded great, but tube amps can cure their "hot" high register.
Now I hope to finish a F2 amp soon...who knows how far these driver can be pushed?!? 😀
My other speakers are JBL L65, Altec 755E (OB) and Greencones in OB, but these drivers are much more "room friendly".
The project posted by Scottmoose and your own are the only ones I know made for this driver: let us know your impressions!
Ciao
thank you for posting here your project, I'm trying to collect all the data and experiences on these drivers in this thread.
I think they are fine drivers, and that they are really enjoyable with low power amps.
I tried them in zigmahornet enclosure and I loved them immediately.
They go low, I mean really low, much lower than Fostex fe103. They don't have the same beautiful midrange, but they have a lot less of Fostex's shortcomings in upper and lower register.
I tried them wit chipamp (lm3886), D amp (Fenice 2024), and now tube amp (dual mono ecl86 single ended triode, no compromise diy version!).
With every amp they sounded great, but tube amps can cure their "hot" high register.
Now I hope to finish a F2 amp soon...who knows how far these driver can be pushed?!? 😀
My other speakers are JBL L65, Altec 755E (OB) and Greencones in OB, but these drivers are much more "room friendly".
The project posted by Scottmoose and your own are the only ones I know made for this driver: let us know your impressions!
Ciao
Thanks for the advice since I first listened to them I have upgraded the size of the port from 16mm internal to 35mm internal and tuned to 60hz from memory
I will take thoes other measurements and get back to you another off topic question how are you with tube amp wiring I want someone to look over my circuit to make sure I did it right befor I switch on?? If I can get these pipes sounding good I'm thinking a black metallic ??? Thoughts are the baffle step circuit resistor and inductor in parallel or are they they in series then parallel across the speaker terminals
Nice to find, some people tried these. just wondering if it is possible to paint the middle part. I guess it is called the dust cap?. anyway it would be nice if the speaker was completely white.
Hi,
did you mean the phase plugs? The "bullet like" copper things in the middle of the cones?
I think you can easily remove them as they are magnetical connected with the speaker (neo version).
Then you can measure their bottom diameter and ask to Planet 10 if they can be substitute with his wooden phase plugs, they are really nice!
Ciao!
Try search for the seller "anitaydavid" on ebay (I have no affiliation with him).
He should still have some with standard ferrite magnet.
Ciao
Ok thanx for you reply, i'll see if i can remove them when they arrive. good to know they can be replaced 🙂
Yeah happy days! got the speakers last week and now I'm trying to calculate the proper cabinet dimensions using this site: mh-audio.nl - Home
Fs = 68,971
but I can't find Sd cm2 in the specs? how would one calculate this?
Fs = 68,971
but I can't find Sd cm2 in the specs? how would one calculate this?
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