I just bought a DD-18, beautiful unit, and I just have a few question about setup and connections
I have it hooked up to a Yamaha Z9, with the setting of a monaural' signal output. (not stereo', not front and back').
Now, first, the Yamaha has left and right LFE pre-outs, as it can accommodate two subs in Stereo/FrontAndRear sound fields.
Do I just connect my sub-woofer cable to ONE of these outputs on the Z9, and then use a Y-splitter cable to connect the other end of the cable to the TWO inputs on the DD-18?
Or can I have my Z9 outputting a Monaural LFE signal through both of its pre-out and connect a separate cable for each left and right pre-out, into the DD-18's left and right inputs? Or does it not really matter, and the effect will be the same?
My second question is:
The DD-18 is a THX Ultra 2 certified sub, and the Z9 is also THX Ultra 2 certified, so in the Z9 there is a setup option which asks if your connected subwoofer is a THX Ultra 2 compatible sub.
What exactly does the amplifier then do if I say YES, or if I say NO to this option. The manual does not really state what this setup feature does. Should I set the Z9 to YES, or NO, and what difference will I hear, or what things is it doing different to the signal?