Peachtree Audio Nova - No subwoofer connection


I just switched from speakers (Martin Logan Ethos) needing no subwoofer to a pair of monitors (Reference 3A MMC Serie) which have an advertised lower limit of 40-42 Hz. This is fine for most of our listening but there are occasions, like when watching movies, when additional bass would be nice. I have a Polk Audio Micropro 4000 which seems very capable but the Nova has no dedicated connection for a sub. I talked to a Peachtree technician who said the only way to connect a sub is to use a splitter at the RCA pre-out connection dividing the signal between the Peachtree 220 amp and the sub. I tried this before and, of course, the sub works fine but it changes the overall sound in a not good way.....and I'm not good at judging minor changes.

I also use the Behringer Ultracurve 2496 in the system and separating the signal this way bypasses the sub's signal from the equalizer so auto room adjustments won't include the range of frequencies that would be produced by the sub. I suppose that if there was a dedicated sub out connection the result would be no different. Because base frequencies, though, are a big part of adjustments for the purpose of room equalization, this is a problem.

Because the 2496 has an unbalanced 1/4" aux out" it crossed my mind that it could be used for a sub. The manual doesn't seem to address this and I've not found discussions about this on the Internet. I've also not been unable to establish communication with Behringer for their help.

There's a good chance that I'm off base on some of these assumptions about this all works but if anyone has suggestions that might help with this dilemma it would be much appreciated.
128x128broadstone

Showing 3 responses by zd542

That's a good suggestion. Just run a cheap pair of speaker cables from your speakers to the sub. I know it doesn't sound like a good idea from an audiophile point of view, but there's really nothing wrong with doing it this way.
What happened with your ML's? I thought they would be a good speaker for you.
"These terminals look like speaker level inputs as would be the inputs on a passive sub and if this were the case that connection would bypass the sub's amplification circuitry; they assured me that this is not the case and all capabilities would remain operational such as volume, phase control, room balancing, filters, etc. I'm confused. Having a speaker level signal delivered to anything other than directly to a driver makes no sense unless their is some attenuation circuitry reducing the signal level. Also, what about the impedance reduction resulting from paralleling the speaker outputs."

I get why you think this might be a bad idea, but its not. Its perfectly OK to use the speaker cable connection the way Polk recommends.