biamplification wiring how-to

Cmpromo,

If your pre has 2 sets of outputs you can either use 2 pairs of IC's out to the amps or splitters and just 1 pair of IC's. From George's, Yioryos, posts I gather that he and I are bi-amping in very similar fashion. My IC's out to the amps are perhaps 1 meter shorter than his. As you can imagine, a quality IC of this length will not be cheap so I elected to use only one set of outputs and a single pair of IC's out to the amps. I then use a Cobalt Cable XLR-XLR y-connector to feed each channel of the amps. There could be a slight degredation with this setup vs. using a pair of IC's, but with truely balanced components I doubt it would be much.

I'm using the vertical bi-amp configuration that Tripper described. I found that in my system this had the best sound vs. the horizontal method. I have also found that the amps I have owned have sounded best when not used in bridged mode. I have not owned true monoblocks to date. Maybe someday.

George, if you're still following this thread, did you need to use an active x-over with the ML and Rogue amps?

Hi George,

I have 10t's as well so I'm very interested in your bi-amping experiments. I have been trying to find tube and SS amps that have gains and input impedances that match well enough to not use an external x-over. BAT amps usually come to mind but the Rogues are looking like another option here. I have not been able to find any gain specs on the M-150's so I'm hoping you'll know. The Levinson 27.5 looks to have a 26 dB gain which is a better match with some tube amps like the BATs. The Classe's I'm using have 29 dB gain so they may not match up well without the use of a x-over or I may have to swap them out with something else. As you know the 10t's like alot of power so I agree that the bi-amping is a great way to go. And the tube amp on top and SS on the bottom is great way to get that tube sound short of using 4 high powered tube amps.

I found the same thing about running stereo amps in bridged mode. Classe said it was fine to do. But I found that they weren't as smooth and ran hotter. I believe that there is also an issue with the load that the amp sees. In bridge mode an 4 ohm load looks like 2, and so forth. I agree, true mono-blocks are preferable.

I'll have to check out the Bryston x-overs. I couldn't find a Marchand that had balance connections.