Processor upgrade from Integra 9.8?

There are subwoofers like Rythmik or MLogan that accept two simultaneous connections, an LFE from the prepro and a line level from the pre. You will need two outputs from your stereo pre; one for your mains and the other for the sub. There are other solutions, like the one offered by SVS, which put the sub between your pre and your mains. Check their websites.
Regarding the MX121, did Mc people tell which D/As are they using?

Ridom - good idea. That was 1 of the things I was going to investigate. My sub is a Velo DD-15+ and I'm pretty sure it has that capability. Thanks again.

I'm probably just going to run the sub through my 2-channel pre to avoid having to set my full-size front and rear speakers to "small" in the Integra. Seems like the path of least resistance and brain damage; also don't have to worry about changing sub settings, etc. My fronts have strong bass and the last thing I want is for 40-100hz to be handled by the sub instead (this inadvertently happened several years ago for 6 months and drove me crazy in 2-channel until I figured out what was going on)

Thanks all for your help - I'll probably also pick up an 80.2 or 80.3 sometime soon. Prefer new w/warranty.

Ordered 80.2 today - will hopefully have it by Friday. Was getting a headache trying to reinvent the wheel... :-) Thanks all for your assistance.

I too have a DTC-9.8 and am thinking of upgrading to a 80.2. Please let us know if you think the difference was worth the upgrade.