TABAQ TL for Tang Band

[Bjohannesen]

I am starting this thread not to mix up things like I did on http://www.diyaudio.com/forums/showt...08#post1036908



Take a look at the thread above, which has a link to my Quarter Wave design TABAQ for the nice 3" TB drivers.

I would appreciate commments and suggestions as I am not the right person to claim "it is a nice speaker".

I am impressed, however, how much you can get out of these small drivers.

I have tested my TABAQ with TB W3-926S and W3-315SC. Both are doing well.

I am a great fan of Martin J. King´s models, and I have simulated TABAQ with TB 4" driver. On paper it looks very promising, but I have not tried it in real life.

I have enclosed the simulations.


Hi from
Bjorn

[Solve]

Thanks Bjorn!
Goint to build those with Tangband W4-1320SA.

Solve

[Scottmoose]

Looks pretty good to me. The TB drivers have enough excursion to keep distortion in the LF regions low, and there's a nice, gradual roll-off too, so no boom. Will need to be placed against a rear wall or into a corner though, or have a BSC circuit as the baffle-step point will be too high to cancel out with room gain. I like. Great little cabinet for those who don't fancy an MLTL or horn. Nice job Bjorn.

[loninappleton]

Originally posted by Bjohannesen
I am starting this thread not to mix up things like I did on http://www.diyaudio.com/forums/showt...08#post1036908



Take a look at the thread above, which has a link to my Quarter Wave design TABAQ for the nice 3" TB drivers.

I would appreciate commments and suggestions as I am not the right person to claim "it is a nice speaker".

I am impressed, however, how much you can get out of these small drivers.

I have tested my TABAQ with TB W3-926S and W3-315SC. Both are doing well.

I am a great fan of Martin J. King´s models, and I have simulated TABAQ with TB 4" driver. On paper it looks very promising, but I have not tried it in real life.

I have enclosed the simulations.


Hi from
Bjorn

I would have never seen this if you hadn't started
the new thread so it's much appreciated.

I will try anything to get my W871's in something
that sounds decent. With all the talk about the small
Tangbands, I've never been happy with the builds
I've done for them. I did a TL in PVC to 41 inches,
small open baffle, and a 16 in tall "whiskey carton"
design ala' John Krutke. No happiness after all of
these. Small open baffle actually sounded best
at extreme nearfield.

Your design looks like it has real possibilities. Also
the presentation for new builders in the pdf is very
well-done.

[Svein_B]

Nice work Bjorn!

I notice that your simulations are "ruler flat" down to around 55Hz. I am not (yet) very familiar with the MJK simulations, so I am not sure if it assumes free space, or if it takes into account floor reflections and rear wall room gain.

If the sims are free space, I wonder if they might offer a little too much lower bass "boom", especially in a smaller room. Would it be possible to dimension for a slight drop in gain for the lower octave, possible with a little lower tuning?

I am just curious regarding sims vs. reality. Do you have any (subjective) listening experiences to share with us ?


Svein.

[Scottmoose]

They're 1/2 space sims.

If you look carefully, you can see that the response actually gradually decreases (accident or design ;-) and as they cut off at a relatively high frequency (not bad for a little driver though) I don't think boom will be a problem, especially when baffle-step loss is brought into play.

Regards
Scott

[Bjohannesen]

Hi Scootmoose


As you can see in the article (link in the other thread), I am using BSC. 3.9 Ohm in parallell with a 0.1 mH coil.

The bass is not boomy at allwith the 3" drivers, not even in i a corner. For fun I tried the TABAQ with Hi-Vi B3S - and then, the bass got too "impressive".

I have not tested the 4" driver, but I expect this to perform nicely as well.


The stuffing density is 3 times higher than I use in my other quarter wave contructions (subs - but that is another story).

Bjorn

[Scottmoose]

Sounds favourite. Neat little speakers.

[Bjohannesen]

Hi Svein, I used hours of funny work with MJK software before I ended up with the design.

These 3" TB drivers do not perform if you tune the cabinet lower than the 55Hz I have done. The same goes for the 4" driver, by the way.

Bjorn

[Solve]

Hi Bjorn!
Just wonder, do i gain anything with 4" drivers?
Does it go lower or nearly the same as 3"?

Solve