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#2413 - 04/03/02 09:11 AM Center Channel

I have a Rotel - 840BX Integrated Amp manufactured around 85 / 86 in perfect working condition. I would like to know if there is a way to combine a center channel with a pair of M60ti speakers.


#2414 - 04/03/02 01:03 PM Re: Center Channel
alan Offline

Registered: 01/29/02
Posts: 3186
Loc: Toronto/New York/Dwight
Hello Jim,
If I understand your question,your Rotel is a stereo amp--2 channels, left and right. You could use one of those two channels to drive a center-channel speaker, or you could drive the M60i's as front left and right main channels. But you need an outboard Dolby Digital or Pro Logic decoder to derive a center-channel signal from Dolby Surround tapes, DVDs or CDs, and an additional mono amp to drive the center channel. Technics used to offer an inexpensive outboard Dolby Digital/dts decoder, but you'll still need 3 extra amps for the center and two surround channels.

You might find a used Pro Logic decoder on ebay; Yamaha used to build some with ProLogic decoder and three internal amps built in to power the center channel and 2 surround channels. They were intended for people like you, who only had a simple stereo amp and wanted to upgrade to 5-channel home theater. You could use the Rotel to drive the main front left and right channel M60i's.

Alan Lofft,
Axiom Resident Expert

#2415 - 04/03/02 06:50 PM Re: Center Channel

Thanks for the input. Here is another question. Years ago I seem to remember seeing wiring diagrams showing a center speaker utilizing the + R and + L, do you recall seeing anything similar? If so, can it be done or am I dancing with the devil?


#2416 - 04/03/02 07:21 PM Re: Center Channel
BBIBH Offline

Registered: 01/10/02
Posts: 1032
Loc: Canada
Yes, search for a post that I created, or replied to. It involves the B channel speakers, and is only really a stop gap measure. It requires a decent output stage, and should work with your Rotel.


#2417 - 04/03/02 09:35 PM Re: Center Channel
CAV104 Offline

Registered: 04/03/02
Posts: 118
Loc: Lake Worth, FL
Could not find post. I seem to recall seeing this in a DYNACO publication. My thought is to include a subwolfer as the center utilizing the +R and +L, but for now its just a thought. Allen might try this method over the next several days and post his results. WAIT and SEE
Jim /CAV104


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