Originally Posted by alk3997
Rob, a quick question for you. I was looking at the append by an owner of a Denon AVR-5308A (I assume 5308 since the 5803 doesn't have Audyssey). When I'm tuning my DD15plus with a 5308A using the Velodyne test CD, should I output in stereo (so no surround or center speakers) and the front mains set to small? Or should I run in something like PLIIx but set all speakers to small temporarily (center and 4 surrounds are usually set to small)?
If I leave the fronts at large (they go down to 18Hz +/- 3dB) and run in stereo, I can't see how any signal would go to the sub since no high pass would be applied to the front mains.
What I'm really asking is what is the best method for equalizing the DD15plus and also how does the DD15plus "know" when to output sound and not output sound. I see the "sync" message appear and I'm assuming that's how it knows which cycle to output and not output, but I am curious how it really works.
Excellent question. The subwoofer knows to output signal when signal is applied to the input, this is controlled by the bass management circuit in your AVR. The supplied test disc is in 2.0 stereo and has no dedicated LFE track, so setting your speakers to large will result in no signal going to the subwoofer as your AVR believes the mains are capable of playing deep full bass. Now unless you have powered towers, chances are while your speakers can play deep, the bass will not have sufficient punch unless you are driving the AVR loudly, hence you are adding a subwoofer.
For a typical home-theater configuration, it is our recommendation that you select small speakers for your mains. I have mentioned before the way a crossover works, and that it is not a cut off but rather a gradual transition. Given the usual AVR 12dB per octave slope, most folks should set their crossover between 60-100Hz. This will route the deepest bass frequencies to the subwoofer and its dedicated amplifier.
Disclaimer: As with all thing audio your individual equipment, setup, and preferences will affect your results, there is never any one "right" answer and you should always do what sounds best to you. Experimentation will yield the best results, you should always go with what sounds best to you and not what someone else's belief of what is correct or not. Feel free to seek advise as a starting point, but at the end of the day it is your system and your the one who will be listening to it. All that matters is that you enjoy your sound system.