Two subwoofers for two channel music listening
Martin Logan makes a couple of lines of subwoofers and they recommend the line level option over the high impedance connection where possible, though to be honest, I doubt that you or I would ever be able to hear the difference. I'm no audio engineer, but I did stay at a Hollywood Express last night :) |
You want your subs to be the deepest, tightest and driest they can be, the last thing you want is an amp driving another amp, that’s just wrong and gives one note bass, that’s why line level drive the best for them. I gave you more credit than that, guess I was wrong. In this scenario, no amp is driving another amp. You are completely off the mark. The only thing that is happening is that the main amp is sending a low level signal to the sub amp. This works beautifully and makes it much easier to make the main speakers and sub(s) coherent. Oz |
It's interesting that the SVS 1000 has both line level and speaker level inputs. I have the SVS SB 3000 and it only has line level. But it does have a terrific Bluetooth app to manage volume, xover point, slope remotely. No more continuous getting out of your listening position to tweak the sub controls. Really comes in handy for music that's recorded a bit this as the Bluetooth app also allows user preset settings. @ozzy621 - thanks for commenting that the speaker level input doesn't result in an amp driving an amp. Inherently we all should know this can't be as the sound would be horrible. I still don't understand how 'the main amp sends a low level signal to the sub amp' and not full range signal as the main amp speaker terminals are designed to do. Perhaps someone out there could explain how this main amp speaker output to sub amp speaker input works. |
Remote Control of Sub(s) sounds terrific, initial setup from a few listening spots. After that, remote volume would be very nice. A crossover has to exist somewhere, to separate low bass from everything else. Home theater receivers have built in, and the content coding has separate bass. 2 channel amps for music systems typically do not have crossovers built in. You can use a self powered sub’s built in crossover, that is the method that makes it easier for the amp and mains because they do not have to produce low bass. A separate external crossover does the same thing, except you have more control of the quality of that device. And you do not need to get any signal back from the sub. Crossover sends lows to sub, everything else (easier job) to the amp(s) which send signals with no low bass (easier job) to the mains. http://www.acousticfrontiers.com/three-ways-to-add-a-subwoofer-crossover-to-your-two-channel-system/ Many subs have crossovers built in, some line in, some speaker wires in, some both. If via speaker wires, the amp is still producing low bass, then the sub filters that for itself, and sends speaker wires to your mains. This gives the mains a break, but does not give the amp a break. |
Since my speakers are in a slightly recessed open room, and face a much bigger room, I measuered and phase aligned my subs, with the towers on top. This works side by side, too. Maybe human hearing is not very directional at low frequencies, but this phase alignment certainly decreases the interference between the subs and tower woofers. |
