TAD 3-way

[virious]

Hi

I am planning my new 3-way TAD (mostly) speaker.

Bass: Usher 15HM (temporary, until a set of TAD shows up locally)
Midrange: TAD TM-1201 (on its way)
Tweeter: TAD TD-2001 on a Yuichi horn. (not bought yet)

Preferably crossed actively at about 300Hz and 3kHz (has anyone tried using the midrange that high?) Otherwise 1kHz - measurements will show, but the horn has to be big enough to accomodate the 1kHz crossover. I am thinking of using Yuichis A-480 horn.

Any thoughts on this project?

Many thanks,
Jeppe
Denmark

[ScottG]

The Usher will probably be every bit as good as a TAD in bass and midbass. Really it's mostly a matter of the driver's T/S vs. the enclosure.

Considering the use of poly graphite for a mid, I'd recommend looking into this driver instead for bass and sub-bass:
http://www.sbacoustics.com/index.php...5-sb42fhc75-6/

The mid is unique, but like any larger diameter it will be more directive as you go higher in freq.. You'll need to determine it's response off-axis vs. that of the horn/driver you want to combine it with to get an even response horizontally. The crossover will likely be lower in freq. than you are intending, but that should also mitigate problems with combing.

Your TAD/Yuchi A-480 preference should work well. Personally I'd opt for the "fin-less" version of that horn.


Note: IF the TAD mid has a wider dispersion pattern than most mids that size (due to it's dustcap and shallow profile), and you can actually crossover higher then there is NO reason for the TAD and larger horn. Instead look at the A-1k with an 18 Sound NS1095N and pocket the difference.

[ScottG]

I should also add that these are the horns I'd recommend (instead of the Yuchi's):

Welcome to Bentwood Horns

However you'll get better sound from a Beyma TPL-50h.

[ScottG]

..correction Beyma TPL-150h

http://profesional.beyma.com/ingles/pdf/TPL150H.pdf

[virious]

Hi ScottG

Thanks for your thorough reply.

So I have to measure the off-axis frequency respons for the TM-1201 in order to choose a proper horn?

On Yuichis page the A-1k is unfortunately "Not available yet"

I will look in to the 18 Sound and the Beyma. Thanks alot

Jeppe

[virious]

By the way, why would You use the SB Acoustics instead of a TAD og Usher? Better low end?

Thanks,
Jeppe

[doug20]

Originally Posted by virious

Hi

I am planning my new 3-way TAD (mostly) speaker.

Bass: Usher 15HM (temporary, until a set of TAD shows up locally)
Midrange: TAD TM-1201 (on its way)
Tweeter: TAD TD-2001 on a Yuichi horn. (not bought yet)

Preferably crossed actively at about 300Hz and 3kHz (has anyone tried using the midrange that high?) Otherwise 1kHz - measurements will show, but the horn has to be big enough to accomodate the 1kHz crossover. I am thinking of using Yuichis A-480 horn.

Any thoughts on this project?

Many thanks,
Jeppe
Denmark

You should consider the SEOS-15 or SEOS-18 (1" throat) that is being offered out of poland (See waveguide/horn thread in the group buy forum).

It will have superior measurements to all other horns from 1KHz on up (IMO). The TAD TD-2001 should match well You can probably request a specific angle to match the TAD perfectly. Where are you buying the TAD TD-2001s? I have one avalable


I would then go with a larger mid range to match the directivity/sensitivity of the horn at the XO point (JBL 15" 2226Js come to mind). Add a big bass bin with a quality subwoofer that can run from 20Hz to 200Hz.


Honestly, I never understand why people bother with low sensitivity driver choices period but to try and match them with a high sensitivity/high quality CD makes no sense at all.

[ScottG]

Originally Posted by virious

By the way, why would You use the SB Acoustics instead of a TAD og Usher? Better low end?

Thanks,
Jeppe

- it's a composite (paper and glass), so it's going to be stiffer and that generally helps with detail. IF you are getting the "h" version of the TAD mid then it should help marginally with integration between the two drivers. IF you aren't getting the "h" version (with the poly graphite), then I'd just stick with the Ushers depending on how low you want to go vs. spl. (..in an active configuration you can always eq. the low end but you are always limited by excursion/sd vs. spl.)

Yes, you most definitely should measure the off-axis horizontal response of the mids every 5-10 degrees off-axis.

Anything much over 1 kHz will be better with the Beyma.

[pos]

both the TM1201 and TM1201H share the same cone. The only difference is in the VC, the H being a 16ohms version.

[ScottG]

Originally Posted by pos

both the TM1201 and TM1201H share the same cone. The only difference is in the VC, the H being a 16ohms version.

..oh, I thought there were some older non "h" versions that were paper with a foam graphite dustcap.. My bad. So I guess it's back to the S&B.