Often a subwoofer won't blend well with a FR. I like midwoofers with more extended range and a smooth roll-off at the top.
dave
It's indeed very difficult to match a sub with a fullrange/wideband...
only few subwoofers are able to do a good job up to the mandatory 150-200hz (and even more sometimes). One of the best i tested is the TIW250XS. It's actually a woofer with subwoofer capabilities. Very impressive.
Yep, I meant to say speech, bad English...
My kids have played piano, saxophone, flute and violin a lot at home, even accordion for some time! I have also recorded their sound and looked at spectrograms!
Jon & Planet10 - A brilliant flat speaker there! Taking the best out of a small fullrange! And a nice room to match!
Based on the factory alignments extention about the same as the SDX7.
Thanx, there are no more SDX7, so something to look at.
dave
TIW250XS is very manageable up to 300hz if you work with a DSP (even more if you're not too picky regarding low-mids)
also the 10w6v3 is expensive and limited to about 200hz but his performance between 50-120hz is unmatched, while having 20-50hz subwoofer capabilites to put some big boys to shame.
also, the economic option would be the UM10-22. Also manageable up to 200hz, but not as good as the other two for either low-mid or sub frequencies.
also the 10w6v3 is expensive and limited to about 200hz but his performance between 50-120hz is unmatched, while having 20-50hz subwoofer capabilites to put some big boys to shame.
also, the economic option would be the UM10-22. Also manageable up to 200hz, but not as good as the other two for either low-mid or sub frequencies.
There is no way the SDX7 can be considered having ''subwoofer capabilities'' on the same level as the 3 options mentionned above. It's not even close.
Like making a comparison between a Ferrari F458, a Porsche GT2, a Corvette and... a Mini Cooper.
It goes as low as the TIW250XS (based on Visaton alignments) just won't move as much air. Sealed box with a bit of boost gets you below 25 Hz.
dave
dave
Effortless 20-35hz is very difficult to achieve, unless you have a tiny room and listen at very moderate volume.
Also, the second you push some EQing in the first octave, you need a very well made driver to handle it.
Also, the second you push some EQing in the first octave, you need a very well made driver to handle it.
The SDX7 is well designed and made. It has XBL.
I have yet to feel the need to bring in the dual Twin SDX10 subs to fill in the bottom octave.
dave
I have yet to feel the need to bring in the dual Twin SDX10 subs to fill in the bottom octave.
dave
I can think of a (very) few acceptable 2ways: some Tannoys, JBL 44xx, Everest, K2, GedLee may be and that's about it.
This kind of statement sets off an alarm for me. What could be fixed with DSP that couldn't be done another way? Not a prejudice against DSP, especially at these frequencies.
On one hand a crossover of any kind is like a two dimensional solution to a three dimensional situation. DSP can simplify with a crossover compensating for a problem that may be acoustical in nature.
On the other hand a 10" driver having issues at 300Hz, could it be something simpler like a spider resonance?
Thanks, it does look fairly good. Maybe there is something that could be said though. There seems to be some kind of resonance around 400Hz that might be a spider resonance which should be easy to account for in a crossover. Apart from that an acoustic problem would take a bit more poking around to deal with.
When I look at it I see the surround anti-phase at about 1.2-1.3 kHz. And break-up above that with some trailing 2nd harmonic below (and above along with 3rd).
Not really seeing anything with the surround at 400 Hz.
I wish that Visaton's Impedance was higher "res.", but I'm not seeing anything wrong until the surround resonance (..except for the usual inductive rise).
Am I missing something? 😕
Not really seeing anything with the surround at 400 Hz.
I wish that Visaton's Impedance was higher "res.", but I'm not seeing anything wrong until the surround resonance (..except for the usual inductive rise).
Am I missing something? 😕
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Much a question of steep slope xovers and precise level adjustements (not really achievable with classic/passive set-up)
When you're using a ''subwoofer'' at such high frequencies, chances are that you'll need to brickwall it. Otherwise it will leak in the midrange and you sure don't want a subwoofer to start singing... 😛
Anyway, the TIW250XS is really an exception, i think.
Usually, subwoofers that are as good crossed that high are... not real subwoofers. Like the SDX7 example.
OR it's a subwoofer that you push out of his comfort zone while thinking he's perfectly at ease.
Either way, i think it's a clear cut case of lack of references.
Usually, subwoofers that are as good crossed that high are... not real subwoofers. Like the SDX7 example.
OR it's a subwoofer that you push out of his comfort zone while thinking he's perfectly at ease.
Either way, i think it's a clear cut case of lack of references.
Well, I'm not looking to muddy the thread with a soapbox rant but since the topic is crossovers.. I'm not uncomfortable performing any manner of fine response equalisation, narrow passbands, phase adjustments, impedance fixing and even delays, using passive speaker level components.
Earl Geddes has taught me a thing or two here. Below the Schroeder frequency, things become acoustic.. related to the room and fixable in spatial terms.
His recommendation is for running the mains in a good normal listening position and running them down, but only so far (below 100Hz somewhere), and fixing them in space using subs, generally below 200Hz.
As I see it, there is a questionable region where acoustic discontinuities in the order of a foot or two in distance can be worthwhile examining. I have used spatial corrections up to 800Hz. It works, if only to prove a point.
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