We've done the "absolute phase" debate here a number of times. My DAC64 inverts phase and after the last discussion I vowed to try hooking up my speakers the other way around just to see if I could hear a difference where I'd never heard one before :rolleyes:\r\n\r\nWell, I did hear a difference, but it has nothing to do with absolute phase. The bass suddenly became a lot fuller, bloated almost. At first I wondered what was going on but then I realised that of course my sub was still connected to the amp "correctly", that is to say, not switched around so the relative phase of the sub to the speakers was altered. For those about to make a smart arse remark, when I tried inverting phase before and heard nothing it was before I used my sub for music ;)\r\n\r\nNow, I connect my sub (MJA Pro 50) via the high level connection so it has 3 wires that go to the speaker terminals on my amp: one each for the +ve Left and Right and one to connect to [b]one[/b] of the negative terminals (it doesn't matter which). Is it possible just to reverse those connections just like I've reversed the speaker connections? ie: hook the two "postivie" L & R wires to the respective [b]negative[/b] speaker terminals and the "negative" wire to one of the [b]positive[/b] terminals? I didn't want to just try that for fear of damaging something.\r\n\r\nMy sub has phase adjustment from 0 to 180 deg but since I had to have it set to 90 deg before to get good integration I would need an adjustment to 270 deg to get the same effect - or wouldn't I?\r\n\r\nPreviously using either 0 or 180 deg gave ridiculously bloated bass and 90 was perfect and since I changed the speaker phase it's more or less the other way around but I don't quite understand why. Ideally I'd to "wire up" my sub with inverted phase just like I have done my speakers and then I can go back to using the settings that I know work that took me [i]ages[/i] to get right :(\r\n\r\nMichael.