Systemic Development > Bipolar System Disorders
Stereo Subs Anyone?
BobM:
I had one for the longest time, but man things really changed for the better when I added a second one.
HAL:
Stereo here, but always thought a SWARM sub setup would be interesting to try.
Heard that at RMAF a few times with really good results.
_Scotty_:
Four is better than two😁
You may also get a much flatter bass response if the two in back are 180° out of phase
with the front two.
GDHAL:
--- Quote from: _Scotty_ on January 31, 2023, 04:13:22 PM ---Four is better than two😁
You may also get a much flatter bass response if the two in back are 180° out of phase
with the front two.
--- End quote ---
That is an interesting point , and there is truth behind it. Here is a relatively recent article on the subject of out of phase speakers when on the opposite side of the room:
https://boomspeaker.com/subwoofer-phase-0-or-180/
The thing is, in my experience, it's more trouble and problematic to achieve than it seems. In this case, the "it's" I'm referring to is when you opt to fire speakers (subs or not) towards/at each other.
In my opinion, that doesn't work well for two channel stereo listening. Surround sound, perhaps.
Correctly implementing a sub with other speakers is difficult on its own. Having them fire towards one another just makes an already difficult task even more difficult, if the end goal is to achieve optimum sound quality.
Besides that , if you're going to spend on four quality subs , you're probably better off spending on two subs and then spending the additional money on room treatments.
Best.
Hal
_Scotty_:
The article needlessly complicates the subject. The speed of sound is about 1,100/sec.
Roughly speaking a sound wave travels about 1ft/milli-second. Ideally your receiver would have more than
30 milli-seconds of total delay available. This would allow you to cancel the bass sound wave
before it could hit the back wall of most listening rooms. If you can reduce this primary
reflection's amplitude sufficiently you can achieve far flatter bass frequency response
at the listening position than is normally achieved by any other stratagem that I am aware of.
Even if you don't have a receiver with delay, a worthwhile improvement can be had
by had reversing the phase of the sub or subs behind your listening position.
If you have reduced the magnitude of the reflected bass from the wall behind your listening position
you should hear a marked improvement in the spaciousness of the sound stage
and an improvement in the stereo image. The bass should also have a quite noticeable reduction in bloat and boominess.
I run two Rythmik L12 subs in reverse phase and a QSC DSP 30 digital delay set for 15 milli-seconds of delay.
Scotty
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version