Originally Posted by Alex solomon
You see this is where I get confused. According to subwoofer setup guide at Av123 and ( at SVSound also, I believe) they recommend they you set the level on the preamp -5 ( -10 to +10 being the range). This they say, would let the sub work with clean unclipped singal from the pre-pro. So who is right?
BTW, if I lower the gain on the sub, does this mean I have to re-run Audyssey again or could I just use SPL meter to adjust the sub level?
If you set the subwoofer level (at the sub) so that receiver/pre/pro outputs a signal between -5 and zero, you'll have accomplished this:
Originally Posted by glennQNYC
Let me clarify... You want to use the hottest undistorted, full waveform (unclipped) signal you can get into an amplifier without overloading the input(s).
Each subwoofer amp will have a different level setting to accomplish the above. I usually start out at 1/3 volume on the sub and work up until the receiver/pre/pro is at -5 to zero. One sub I had needed to be set at ~2/3 of it's full scale. My Earthquake sub was at less than 1/4 of it's volume scale. My current JL subs are at 1/2 of their volume scale.
You want to avoid going above zero with the receiver/pre/pro output because you run the potential of overdriving the sub amp inputs and/or clipping the signal.
Originally Posted by mmiles
Yes, run ARO first.
If you want to run ARO at all, run it first. However, ARO is a single point, single band EQ. Audyssey is a multi-point, multi-band EQ. They may or, (more likely), may not compliment each other. In that case, skip ARO and just run Audyssey.
I have posted about this previously in this thread:http://www.avsforum.com/avs-vb/showt...36243&page=154
(Starting with post # 4615.)