Looking for recomendations on 15" woofers - diyAudio
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Old 23rd January 2013, 07:00 PM   #1
DougL is offline DougL  United States
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Default Looking for recomendations on 15" woofers

I have 3 high efficiency projects planed. For all 3 I was thinking I might be able to use the same 15" Woofer.
I have 2 15" sub-woofers, so this would be mid-woofers.

1: Vision B200 full-range OB with Woofer. XO 150 Hz to 400 Hz.

2: SEOS 12 or SEOS 15 "Econowave" style with Woofer. XO 800 Hz - 1200 HZ In 6 to 8 Cu FT box

3: JMLC 400 1.4" Mid horn with ~ 800 Hz XO In 6 to 8 Cu FT box.

Research indicated that "Pro" style drivers are designed for all 3 apps.

I wanted to keep the Budget around $100 per driver

Research indicates several high end drivers might fit, except for cost:
AE TD15M
Altec 416
Altec 515
JBL 2226H
B&C 15TBX100

Just for reference, I am currently Running a DCX2496 / Class D amps/ OB with Low Q drivers, so I am aware that there are trade-offs on driver Q.

I know the Eminence Beta 15 would work for the OB, but will it sound good at 1K Hz?

Any thought or recommendations on a suitable driver would be appreciated..
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Old 4th February 2013, 04:00 PM   #2
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By all accounts the TD-15M is an top class woofer, but you would probably need to be prepared to wait at LEAST 6mo to a year or more for them. If you do want some, your best bet is to try and find someone from the group buy he did last year who's plans changed or decided on different woofers due to the wait involved.

In any case the dipole (OB) 15 is listed as $310, but picking an arbitrary price point for the individual drivers is not a good way to go about selecting them.

You really need to pick them based on their performance characteristics. A $20-$30 tweeter might well be better suited to a particular mid than a much more expensive one.
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Old 4th February 2013, 04:37 PM   #3
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why not take a look at Beyma and B&C woofs?
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Old 4th February 2013, 07:23 PM   #4
DougL is offline DougL  United States
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Quote:
picking an arbitrary price point for the individual drivers is not a good way to go about selecting them.
I really don't know how to respond to this, other than to restate mt requirements.
I am looking for a 15" woofer with a moderate cost and designed to play up to 1200 Hz.
I realize that choosing one woofer for multiple projects may involve compromises.
For example, A high Qts and high Xmax would be desirable for an OB.
For the horn projects, a Moderate Qts would be better, and low Le is more important.

Doug
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Old 4th February 2013, 07:42 PM   #5
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1200Hz is probably a bit high for a 15".

If you find one which doesn't distort or break up at that frequency you'd need a 60deg horn to avoid dispersion mismatches.
With 90deg horn you shouldn't go higher than about 800Hz or thereabouts.
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Old 4th February 2013, 07:50 PM   #6
ScottG is offline ScottG  United States
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Oddly enough I'm going to suggest reconsidering the size of the woofer..

All 3 designs, assuming a lower highpass freq. transition around 800 Hz or less, are going to be fairly wide-dispersion (unless it's a modest baffle dipole or mid-cardioid design).

Most 15" drivers by contrast tend to have increased pressure loss at 800-1600 Hz.

Polar continuity between sources could suffer off-axis as a result. Even a typical 12" driver might have too much pressure loss off-axis above 1 kHz.
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Old 4th February 2013, 07:51 PM   #7
ScottG is offline ScottG  United States
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Quote:
Originally Posted by Charles Darwin View Post
1200Hz is probably a bit high for a 15".

If you find one which doesn't distort or break up at that frequency you'd need a 60deg horn to avoid dispersion mismatches.
With 90deg horn you shouldn't go higher than about 800Hz or thereabouts.
Beat me to it..
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Old 4th February 2013, 09:51 PM   #8
DougL is offline DougL  United States
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Here is the link to a SEOS 12 + 15" woofer Build
JBL 2226H + DNA-360/SEOS-12
Quote:
Oddly enough I'm going to suggest reconsidering the size of the woofer..
Why? I am looking for increased reactivity in the 800 Hz range.
It would seem that a 15" is called for.
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Old 4th February 2013, 10:06 PM   #9
DougL is offline DougL  United States
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Here is the other SEOS 12 + 15" woofer:
The "Sentinel" 15" B&C + DNA-360/SEOS-12 LCR design
Crossover 1100 Hz.
I may go with the SEOS 15" to better match the woofer.
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Old 4th February 2013, 10:46 PM   #10
Ron E is offline Ron E  United States
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Take a look at Eminence Deltalite - I have a friend who has them and they are very good indeed, although they don't go very deep unless vented.
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