Amp/Preamp Asylum: Re: Can I Drive Polk SDA-2A's With 2 Bridged Rotel 1070's? by dorokusai Looking for a new Amp or Preamp? If you're after tubes, post over here.

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Posted by dorokusai (M ) on June 17, 2004 at 07:54:31

In Reply to: Can I Drive Polk SDA-2A's With 2 Bridged Rotel 1070's? posted by joeychitwood on June 16, 2004 at 09:10:26:

The Polk Audio SDA-2A is 4ohm. The SDA-2B is 6ohm.

If you run a non-common ground amplifier with SDA's, you will need to use or manufacture the AI-1 interface. Polk Audio no longer sells the AI-1 interface, but directions for building your own are available, and it can be made pretty cheap. The standard SDA interconnect cannot be used in this situation.

I think you would be pushing the limits of the amplifiers at bridged mode, even though the Rotel is a very capable amplifier. I echo what was said previously, in that it may be time to look for another more powerful 2CH amplifier.

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