Why add a sub to a speaker with 2 18" woofers?
Why add a sub to a speaker with 2 18" woofers?
My gut feeling says that the Behemoths outperform the very most of the "high end" speakers, including the girlie speakers you mentioned. I would have loved to listened to them.
I don't see it as a problem at all. In any event, what's the difference between a genuine large full-range loudspeaker and a small loudspeaker on top of a sub?
I don't know but why I am not getting the same dynamics out of my small speaker + sub (I only have one sub ATM) as I get from full range loud speakers?
I don't know but why I am not getting the same dynamics out of my small speaker + sub (I only have one sub ATM) as I get from full range loud speakers? For instance, the Revel F208 has 8" woofers. My Sub has one 10" woofer. Will adding a second sub help?
I don't know but why I am not getting the same dynamics out of my small speaker + sub (I only have one sub ATM) as I get from full range loud speakers? For instance, the Revel F208 has 8" woofers. My Sub has one 10" woofer. Will adding a second sub help?
Which speakers and sub do you have, what's the crossover point and slope, and how are you doing the crossover?
You'll only get an increase in dynamics if the sub has a filter to remove the LF from the main pair. That way, the sub handles all the extreme LF, and the mains only have to handle what they're capable of, say above 80-100Hz. Getting a second sub won't change that.
S
ATC SCM19 (v1) speakers and REL Storm III sub. Right now, I am crossing over (in the preamp - Classe CP800) at 80 Hz with a 6db slope.
I will get some measurements this weekend. @RayDunzl - I am looking at your graph and I am not understanding how you are interpreting compression from it. Is it the slightly steeper dip close to 20k at 95db?
My comfort level is 85db.
Is it the slightly steeper dip close to 20k at 95db?
My comfort level is 85db.
I don't know but why I am not getting the same dynamics out of my small speaker + sub (I only have one sub ATM) as I get from full range loud speakers? For instance, the Revel F208 has 8" woofers. My Sub has one 10" woofer. Will adding a second sub help?
Yes, the frequency response will extend downwards more evenly, but without a crossover from sub to mains, the mains will still be trying to reproduce LF they can't manage, so distortion will be higher and power handling more limited.But you should still get the evening out of the frequency curve, agree?
I think the crossover frequency has a lot to do with it. A sub comes in in the 50 to 80hz range. Floor standers cross over those dual (or triple) woofers around 400hz. The LF driver in the stand mounts is the limiting factor because it is covering too much of the audio range.
Yes, the frequency response will extend downwards more evenly, but without a crossover from sub to mains, the mains will still be trying to reproduce LF they can't manage, so distortion will be higher and power handling more limited.
^ This could explain a lot. The Revel F208 for instance has
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CROSSOVER FREQUENCIES
270 Hz, 2200 Hz
LOW FREQUENCY EXTENSION
-10dB@23Hz, -6dB@27 Hz, -3dB@31Hz
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So the two 8" woofers on the F208 are handling everything below 270 Hz.
Here I am asking the 6" driver on the ATC (crossover at 2.5kHz) to handle everything from 2.5kHz to 80 Hz. So its not that the Revels are large speakers, its that they have multiple drivers each handling a narrower band. Obviously the more drivers it has, the larger the cabinet needs to be.
Is distortion the issue here? The ATCs measure quite well and known to be some of the lowest distortion speakers. As Ray & Co were saying above, is it more likely the compression? That should also explain the perceived lack of dynamics.
F8 Direct Servo bass and midbass subwoofer
F8 is a subwoofer that can cover more than a decade of frequency range of servo control from below 20hz to 250hz.
So if I keep my ATCs, would a pair of these do the trick? Would I effectively be building something like the Revel F208s? I can then place the ATCs on top of these subs.