Looking for recomendations on 15" woofers

[DougL]

I don't think using a 15 incher as a mid-bass is a good idea. you can simply go for a 12 incher of B&C or other nice woofs. IMHO

You may well be right. But I have enough reports of successes that I want to find out for myself.

[DougL]

Helmuth,

Nice Woofer, but it doesn't look like it goes very high in your sym.

[1audiohack]

Originally Posted by tvrgeek

The JBL's are probably the head of their class. I would encourage some measurements on mid-range response, decay, and breakup issues.

Another source of large cone high efficiency midranges are the full range driver offerings. These, like the big JBL, use a light weight cone that breaks up giving the impression of extended highs, but if you are looking for a 100 to 1K driver, one may do very well here as that range avoids the large excursion low end they can'd to and the midrange breakup they do.

It may simply be semantics but I think there is a difference between break-up and ringing "giving the impression of extended highs" and the progressive de-coupling of the outer portion of the cone allowing a light and low Le coil to continue to generate HF.

[Helmuth]

Originally Posted by DougL

Helmuth,

Nice Woofer, but it doesn't look like it goes very high in your sym.

I am often looking for high spl and subbas. The beyma was the best one I could find and not extreme expensive.

I would use it up to 500Hz but 1kHz is also possible.

[Charles Darwin]

Have you simmed the Beyma 15P80/Fe?

Going by Beymas data it looks a bit better to me than the 15LX60V2.
It costs about the same around here.

[Helmuth]

Originally Posted by 1audiohack

It may simply be semantics but I think there is a difference between break-up and ringing "giving the impression of extended highs" and the progressive de-coupling of the outer portion of the cone allowing a light and low Le coil to continue to generate HF.

when you look at the THD of woofers they can have very low distortion at higher frequencies and very low extrusion that let them sound good.

Like this sm115/n not expensive at all and high end THD.

third and second harmonic around -55dB. The low and thd is sensational good.

[Helmuth]

Like I already thought the 15lx60v2 is best in band with and efficiency.

the 15p80fe (orange) can work in a small box but not as good at 30Hz as the 15lx60v2(bleu).

[Helmuth]

Here the SM115N the recommendation in price performence. Big box.

[ra7]

I would go with the recommended jbls or eminence deltalite. Using them up to 1 khz may require some nifty crossover work. But if crossing at 700 hz or so, they will leave evrything behind.

[tvrgeek]

Originally Posted by 1audiohack

It may simply be semantics but I think there is a difference between break-up and ringing "giving the impression of extended highs" and the progressive de-coupling of the outer portion of the cone allowing a light and low Le coil to continue to generate HF.

Talking both things. Decoupling is the more desirable way they work, but breakup is another. Yes, "ringing" of different zones at different frequencies. The problem with decoupling is it means the cone is not working as a piston and the distortion will be much higher. It just plain is not easy! Just thinking bask on all the papers JBL has published on breakup modes, bell-mode, teeter-totter modes and dampening materials. They know what they are doing, but that still does not make using the wrong driver for the application that much better.