Today, just on a lark, I stopped in a local Thrift store. Low and behold they had two NAD 2240-PE amplifiers and one NAD 5220 CD player. This stuff is 1988 vintage, made in Japan, and I scored the whole lot for $24 in perfect condition.

My question is about the amplifiers. They are two channel with 40 watts per channel and a true high-current design with THD <0.03%. OK... Enough gloating :>) I would like to use these in my system for home theater. I currently have a Yamaha RX-V661 that I would like to use as just a pre-amp as much as possible. Connected to the Yamaha pre-outs is a Conrad Johnson MF-80 external amplifier (Solid State early 90's vintage w/ 2-channel, 80 watts per channel) to drive my Vandersteen Model 2 CE front left and right speakers. The in-wall surround speakers can be driven by the Yamaha, but I would like to incorporate one of the NAD amplifiers to drive a center channel. My questions are (1) Should I simply connect one channel of the amplifier to the CC and leave the other channel connected to nothing? or (2) can I connect both amplifier channels to the same CC ? My concern is that both of these scenarios could damage either the amplifier or speakers.

Matt

Today, just on a lark, I stopped in a local Thrift store. Low and behold they had two NAD 2240-PE amplifiers and one NAD 5220 CD player. This stuff is 1988 vintage, made in Japan, and I scored the whole lot for $24 in perfect condition.

My question is about the amplifiers. They are two channel with 40 watts per channel and a true high-current design with THD <0.03%. OK... Enough gloating :>) I would like to use these in my system for home theater. I currently have a Yamaha RX-V661 that I would like to use as just a pre-amp as much as possible. Connected to the Yamaha pre-outs is a Conrad Johnson MF-80 external amplifier (Solid State early 90's vintage w/ 2-channel, 80 watts per channel) to drive my Vandersteen Model 2 CE front left and right speakers. The in-wall surround speakers can be driven by the Yamaha, but I would like to incorporate one of the NAD amplifiers to drive a center channel. My questions are (1) Should I simply connect one channel of the amplifier to the CC and leave the other channel connected to nothing? or (2) can I connect both amplifier channels to the same CC ? My concern is that both of these scenarios could damage either the amplifier or speakers.

Matt

If the amp is brideable (I don't know) you can bridge it and drive the center channel with it. Otherwise just connect one channel to the center speaker.

You have a nice set of vintage NAD gear.:)

The 2240 cannot be bridged.:( However it will play loudly.:)

Thank You very much. Very helpful!

Can anybody tell me if the NAD 2240 is phase inverting or not?

Matt