Well, what we can learn here, again: don't mess with good design 😱.
I had covered the box walls behind the driver with some 5mm thick heavy cloth, to dampen higher harmonics, and I thought that it does not affect to bass response. And that was false idea...
Now there is just the 100g as suggested, and FR from 1m looks like this. The placement is same as before, but below 100Hz it looks much better. Thanks all.
I had covered the box walls behind the driver with some 5mm thick heavy cloth, to dampen higher harmonics, and I thought that it does not affect to bass response. And that was false idea...
Now there is just the 100g as suggested, and FR from 1m looks like this. The placement is same as before, but below 100Hz it looks much better. Thanks all.
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That is a very nice response! It does indeed hit 50 Hz and that is not bad for a driver with a 110 Hz fs. Can you show us the harmonic distortion plot that goes with this? It will start to get worse below 200 Hz but I just want to see how much.
Thanks,
X
Thanks,
X
That is a great looking response for any speaker!
Thanks for taking the data and sharing it. Confirms the typical -45 dB to -50dB THD that the Vifa has above 200 Hz (at least on the TC9FD's that I have measured). You are at -20dB (10%) which is not that bad around 50 to 60 Hz. This looks like it sounds really nice - balanced, smooth, with pretty deep extension given it is only a 3.5 in driver. 🙂
Thanks X.
I have not had long listening sessions yet, but early impressions are very good.
The BSC is modified to give good mid & high response. As I don't have miniDSP, I just used primitive old school components😀 Here is the circuit too.
I am still wondering if the C2 should be 2.2uF instead of 1.5uF. Room damping and own taste makes difference which is better.
This BSC is propably not optimal for placement on the wall, but works better if the speaker is slightly further. I have to put them some 50cm from the wall, that is why it is like this.
I have not had long listening sessions yet, but early impressions are very good.
The BSC is modified to give good mid & high response. As I don't have miniDSP, I just used primitive old school components😀 Here is the circuit too.
I am still wondering if the C2 should be 2.2uF instead of 1.5uF. Room damping and own taste makes difference which is better.
This BSC is propably not optimal for placement on the wall, but works better if the speaker is slightly further. I have to put them some 50cm from the wall, that is why it is like this.
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i just hooked up my tabaq for the first time and the sound is more than i had hoped for. never thought i would experience such speed and resolution from a 3", and there's also super clean bass to boot. i'm using w3-1364sa, not yet fully broken in since i'm still noticing the change in sound from about 30 hours ago when it was initially unlistenable.
two things-
1. the stuffing was less than 100g. after measuring out the cotton, i found it to be way too compact trying to stuff the whole recommended amount in there. so i put in only 70g or so each.
should i stuff in some more?
2. i love the sound so much that i'm already decided to build another pair using tc09fd this time. i'd like to go bipole.
how should i adjust the dimension, and can i wire them in series to increase the impedance?
two things-
1. the stuffing was less than 100g. after measuring out the cotton, i found it to be way too compact trying to stuff the whole recommended amount in there. so i put in only 70g or so each.
should i stuff in some more?
2. i love the sound so much that i'm already decided to build another pair using tc09fd this time. i'd like to go bipole.
how should i adjust the dimension, and can i wire them in series to increase the impedance?
Just double the cross sectional area and double the vent area for a bipole. I would wire the 8 ohm TC9FD drivers in parallel for a 4 ohm load which works better with small class D amps. The bipole really takes care of the baffle step losses and no BSC is needed. You can argue that the extra driver in a bipole is probably less expensive than a coil and cap for BSC and boosts sensitivity from 85 dB to 91 dB (at 2.83 volts drive). It's like getting a 4x more powerful speaker.
i can't go lower than 8ohm since this speaker is planned to be used with a balanced amp.
so by keeping the baffle width the same, i would make the pipe taller or 'thicker'? and the vent taller if the pipe is also made taller instead of 'thicker'?
so by keeping the baffle width the same, i would make the pipe taller or 'thicker'? and the vent taller if the pipe is also made taller instead of 'thicker'?
i see, thanks.
how about vent on both sides?
also the series wiring still ok?
much appreciated.
how about vent on both sides?
also the series wiring still ok?
much appreciated.
I built a folded Tabaq with the TB W3-1364sa a couple of years ago. Also tried CHP-70, but preferred the TB. Very nice midrange.
Those Bamboo Fiber/Paper FR's give Fostex FF85WK a run for the money. I have
heard both in the same uFonken, and they sound
Those Bamboo Fiber/Paper FR's give Fostex FF85WK a run for the money. I have
heard both in the same uFonken, and I liked the sound of the TB better.
yes, as mine are breaking in i am continuously amazed by the sound. makes me wonder how w3-1876 would compare.
I don't doubt you liked the TB more, but since Q & Fs are broadly similar to the FF85wk but Vas is substantially higher, the alignment will have changed compared to the design intention.
I just finished a pair of TABAQ with TB W3-881SI. I still have to lacquer them, as to give them a glossy finish. Paint is HD Behr Premium Plus Acrylic Latex Dark Cavern (Dark Charcoal Gray). For point to point connections inside the enclosure I used Cat5 pairs. The binding post cups are cheap-o $7.00/pair, but they will have to do until I receive an order from Parts-Express that I'm waiting for, with various items, among them some quality binding post cups. I still have a few details left like painting inside the vents, but I can get to those prior to applying lacquer. Getting ready to test how they sound...😀
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Looks very nice. Those look like pretty nice binding posts already - most of the time I use just the $0.80 spring loaded terminal cups and they work fine - not pretty or fancy but they do the job.
How do they sound?
How do they sound?