Originally Posted by NateTTU
I have been setting up the MiniDSP in my system and now I have a few questions. I tried doing some EQ with both of my subs as one, but now when I go back to rerun Audyssey it tells me my sub levels do not match. I have done this two times now so it has me thinking. should I only use the MiniDSP to EQ the subs individually and let Audyssey on my receiver do them together? That way they will already be matched and it won't throw off any of my EQ settings. Also, it seems that I have a pretty big spike at 50 & 70 hz and a big null at 60. I was able to flatten things out, but it required a lot of gain and trim and I noticed it started to make the sound ring a bit. What is a good default max amount of trim and gain to use?
Did you readjust the receiver's setup to use only one sub? Audyssey may be pinging the second sub and getting nothing in return, hence, the level disparity.
Don't waste your amp trying to fill a null. Move the sub(s) and/or manipulate their distance settings (phase).
Don't exceed 24dB of total boost per channel or you'll overload the Mini. It's a good idea to monitor the numerical readouts of the output meters while playing a particularly loud movie scene (I use the bridge collapse in War of the Worlds and the convenience store scene in Cloverfield). Keep the readouts in the negative range.
Can't say how much boost (other than 24dB per channel max), it'll depend on the frequency, the sub and the amp.
If it sounds ugly, that's a sign to turn it down or pull down the boost. Be judicious with the boost. You trade dynamics for bandwidth. IOW, if you raise the bottom, the input level must be monitored to find the point where the boosted frequencies cause distress to the driver or amp. This may mean that your maximum safe input level is lower and this will reduce the overall safe level that the system should be run.
Edit: I would take a measurement before running Audyssey, then take a measurement after running Audyssey, to see where I stood, before doing anything with the Mini.Edited by Oliver Deplace - 7/5/13 at 1:18pm