"BEST" Woofer 50Hz - 300Hz & Hi eff, maybe 15" ??

[DaveCan]

Originally Posted by bear

Regarding the other suggestions - all appreciated.
The older Altec drivers might suffice, but then we have to consider the TAD 1601 as a newer version, and of course the Focal 15 series is also a clone.

The driver I linked on the first page is actually new Altec stuff not old, made by GPA with the old original Altec tooling and recipes etc...

Great Plains Audio's Homepage

[el`Ol]

Very similar and much more interesting for someone in the US is the Eminence Beta-10A My experience with the two (other models) is that Eminence is more on the soft side, while Ciare is a bit more punchy, but this difference needn't be true for these particular two.

[MarzZ]

I am very interested in this thread. I am looking for the same thing. I have great FR and SPL from 20-50hz, but need something to fill in the mid-bass accurately from 50hz-300hz. With a line array (ie 2-10's or 12's) at these frequencies, does comb filtering still play a factor in the timbre of sound on-axis or off?

-suscribed

[chrismercurio]

I don't think 2 of them qualifies as a line array. Due to the wavelength at 300hz you aren't looking at any comb filtering.

[doug20]

Instead of the TD15 lambda series from AESpeakers.com. Maybe people should consider the AV15X instead.

It will definitely go down below 20Hz and still have good effeciencies because its a great subwoofer (One of the best 15" right now!!).

The other bonus is that these amazing drivers play well way up into the 500Hz range. Dual opposing AV15X will give you a great bass bin that will play from 30Hz to 600Hz!!

[doug20]

Originally Posted by MarzZ

I am very interested in this thread. I am looking for the same thing. I have great FR and SPL from 20-50hz, but need something to fill in the mid-bass accurately from 50hz-300hz. With a line array (ie 2-10's or 12's) at these frequencies, does comb filtering still play a factor in the timbre of sound on-axis or off?

-suscribed

I love the TD12S drivers from aespeakers.com for 50Hz to 500Hz! I have never had better mid bass slam in my HT.

[doug20]

Originally Posted by bear

No it is not a good option.

A horn will not readily "time align" in most instances, unless you want the thing sticking out into the listening space by a significant amount, and you can deal with the offset that will be required to prevent shadowing of the HF section. If I had an utterly huge room, I'd give it some consideration, I don't.

Also I have heard few "bass horns" that really sound that good overall, most simply don't get low enough - and few are actually flat in the passband because the mouth size is way too small...

And I also said that this system has a killer subwoofer section, so I am looking for a "filler driver"... ~60Hz - ~250Hz.

shall we go on?

Anyhow, the topic is fairly clear and simple... "direct radiator upper bass drivers - likely 15" & high sensitivity". Ok?

_-_-bear

What max SPL do you need, what amps do you have? Sensitivity should only be a conditional spec based on actually requirements.

IE...a 92dB driver can play above 120 dBs just as well as a 99dB driver. It just needs more power. I give my TD12S, 500Watts each...lots of headroom, heck I never remotely hit their max SPL peaks.

[chrismercurio]

Curious to the sound differences between TD15's, SBP15's and AV15's. I can crunch the numbers on sensitivity, extension and box size...

Maybe John J or Nick M can comment.

Thanks,

[doug20]

Originally Posted by chrismercurio

Curious to the sound differences between TD15's, SBP15's and AV15's. I can crunch the numbers on sensitivity, extension and box size...

Maybe John J or Nick M can comment.

Thanks,

SBP15s? Is that a new AE design.

THe AV series are really subwoofer drivers, with great low extension because of their displacement but John J has shown measurements all the way up to 1KHz that impressed me.

The TD series are woofers used in main speakers. They can extend low into the 30Hz range for full range speakers (X, S, H series) or they can play well all the way up to 1500Hz (M series) but not have the low end without a PORTED design (Fs around 120Hz)


btw, why stop at 15", the new TD18H is sick!!!! (it has a 2.5" coil).

T/S Parameters:
FS: 29.0Hz
Qts: 0.22
Vas: 390L
Z: 8ohm
1WSPL: 98.2dB
Pe: 1000W continuos

18" plus 14mm xmax would create some displacement and the 98dB is a nice start....put 1000W into WinISD and see the numbers

[chrismercurio]

SBP15 is an old paper coned subwoofer. It reaches lower than the TD15s in slightly larger boxes and has a more conventional looking dustcap. Regarding the 18, it is too sensitive and too big for my needs and doesn't offer the extension. I agree that it does look cool though.

Parameters for the SBP15 are as follows. This is for the 4ohm version. 8ohm is available also:

Fs: 21.3Hz
Qms: 5.35
Vas: 364L
Cms: .35mm/N
Mms: 160g
Rms: 4kg/s
Xmax: 18mm
Sd: 855sqcm
Vd: 3.08L
Qes: .47
Re: 2.7ohm
Le: .3mH
Z: 4ohm
BL: 11.1 Tm
Qts: .43
1wSPL: 90.7dB