Robert AG
Stunt Coordinator
- Joined
- Sep 27, 2003
- Messages
- 129
Edited for controversal content.......
I've read that one potential problem with stereo subs is that the bass frequency response becomes poorer due to phase and cancellation problems between them?And to that, I'll add -
If a stereo source is downmixed to mono, and then split to two subs left/right, you get something completely different vs. true stereo subs.
As soon as I get a working 2nd sub amp, I'll be adding my experience.
And as far as built-in subs in towers, having seperate stereo sub boxes will at least give some latitude in placement.
I can't wait to try it.
Nothing changes as far as the main front speakers are concerned, since the low bass and LFE is split off by the subs before going to the mains.I'm sorry, but I don't see how this could be true. It's not like the sub's crossover "knows" that some of the input signal is LFE and thus should not be output back ot the main speaker.
Here's an example to illustrate my point:
Let's say that the entire soundtrack consists of an 80 hz sine wave in the LFE channel. The other 5.0 channels are silent. Let's assume an 80 hz crossover.
In the "traditional" 5.1 setup, you'll find that the entire 80 hz signal is passed to the subwoofer, and nothing goes to any other speaker. Correct?
In your proposed setup, the receiver sends the 80 hz signal out the L and R pre-outs (reduced 3 dB). This signal is passed through the crossover of each sub. The output of each crossover's high-pass filter gets sent to the corresponding speaker.
So, what happens if you send an 80 hz signal through a high-pass filter with a -3dB point of 80 hz? The signal is reduced 3dB and sent to the main speaker.
If the original LFE signal was at 115dB, then each sub's crossover will see a 112dB signal, and each sub will output a 109dB signal to the main speaker's amp.