Any experience with TAD 1601a enclosures?

[ludcam]

Hi all--

Any experience with enclosure volume for the TAD 1601a?

My understanding is that the 2402 is ~130L or 4.6 cu ft.

What do you folks suppose will happen if I build something a little smaller, say 3.6 cu ft (100L) and tune it just a bit higher, like 38hz vs. 32hz.

Will a great rift open in space time and swallow up my family room, sparing neither me or my progeny?

Will women turn from my sight and will the embers of my bed die out and grow cold?

Will my bass response all at once bloat and sag, leaving my fellow DIYers shaking their heads and insisting: "that SOB sure knew how to waste some primo alnico and paper?"

Thanks!

 

[neskor]

TAD 2402 is more around 200-250L
For TAD 1601 you will need something around 170L
Run WinISD to simulate and you will get something like this.
Red line is 100L and the green is 170L

 

[neskor]

also check TAD specs

 

[ludcam]

thanks re TAD

Thanks--and you seem to be correct about the volume of the 2402.

The thread I had gotten my data from discussed how the original calc was off.

TAD 2404 Build - Page 3

I'm still left with a question, however:

Does anyone have experience using this driver in 3.5-4.5L enclosure volume?

I'm OK with a higher tuning, just want to know if it will sound good.

Best
Max

 

[GM]

Any experience with enclosure volume for the TAD 1601a?

What do you folks suppose will happen if I build something a little smaller, say 3.6 cu ft (100L) and tune it just a bit higher, like 38hz vs. 32hz.

Will my bass response all at once bloat and sag, leaving my fellow DIYers shaking their heads and insisting: "that SOB sure knew how to waste some primo alnico and paper?"

Yes.

Less is always less, but one ideally designs to meet the needs of the app, so if this is the biggest you can 'afford'........... for me though, using this vintage spec horn driver in < measured Vas/1.44 net volume [Vb] tuned to Fs that the pioneers decreed was optimum for vented alignments is truly a waste of primo alnico and paper IMNSHO/E.

I presume you mean 3.5-4.5 ft^3.......... 😉 and no, the smallest I've designed was the above with the rest being Vb = Vas, Fb = Fs for coupling to matching impedance tube amps, which begs the Q, what amp are you planning to use as high output impedance amps increase Qes, Qts, increasing optimal Vb, otherwise its system Q [sysQ] can increase Qts' [under damped] to the point of unacceptable 'ringing'/flabby bass, etc..

Qts' = Qts + any added series resistance [Rs]: HiFi Loudspeaker Design

Anyway, with proper damping 'to taste', any speaker alignment can be made to sound good within its limitations, though whether it will satisfy you/meet the needs of the app is a whole different matter only you can answer.

GM

 

[ludcam]

Yes--3.5- to 4.5 cu ft, and yes high output imp

Hi GM,

Thanks for the feedback.

I'm thinking of using this with a 5W SET (although I could always cobble an F4 together) in a modest room size with pretty good boundary reinforcement.

I just don't have the space for anything bigger than 3.5-4.5 cu ft.

My wife has told me that its either my 70hz exponential front horns and subs or her.

And she is still so beautiful to me. And a great conversationalist when she's not mad about my hifi.

I've got the woofers, the horn mids etc., horn tweets.

Although given the resale value of the TADs, I would be happy for recommendations for an alternative woofer

Max

 

[GM]

You're welcome!

What's the amp's output impedance or its damping factor [DF]?

GM

 

[ludcam]

Hi GM

The amps damping factor is very low. Somewhere between 3.5-5.5.

Cheers
Max

 

[GM]

OK, so worst case is ~2.78 ohms including wiring, but with only ~113 L net tuned to actual Fs it will be under-damped enough to probably need significant stuffing.

GM

 

[ludcam]

Another option, I suppose, would be to use a ~90L sealed box, with f3 of ~60hz

The f10 is around 35hz and the sims I ran show the sealed box and the 175L (net) vented box crossing paths at 20hz (~f15)

I could go active with some gentle boost in the 20-40hz range.

Thoughts?

Cheers
Max

 

[ludcam]

Just so nobody starts yelling at me, the 175L vented and the ~90L sealed share very close F15s more like 25hz

f10s are 30 and 35hz respectively

The f5s of the alignments are very different...

So the idea was maybe to go active and add a little bit of boost to the sealed enclosure.

Or maybe try it out first and see what room gain does!

 

[GM]

HR calcs a 0.76 Qtc with the 2.78 ohms series resistance [Rs], so basic damping will probably suffice and with only 5 W and bit of room/boundary gain seems like a good compromise. Of course if [Rs] is lower, then for better or worse it will flatten out any mid bass peaking.

GM