Bi-amping McIntosh MC2120 and MC2125 with Klipsch RP-5

If the amps are sonically identical, I’d be inclined to wire them in a vertical bi-amp configuration.  One amp on the left, one amp on the right.  You get the benefit of improved separation and soundstage, and each channel has it’s own power supply.  There could be some improvement in clarity as well.  Many of the same benefits of monoblocks.

You can try a horizontal setup as well, and see which you prefer.  There are pros and cons with each. 

If your subwoofer has a high pass filter, you could experiment with limiting the low bass frequencies to your RP-5s too.

Thanks! So I guess that’s exactly what I was describing - vertical versus horizontal bi-amping. I will try with the vertical as suggested and go from there, thank you!

  Considering the speakers are 96db and have powered bass drivers, I’d doubt you’re going to need it or see much improvement at all. you’re only using a fraction of the power of one amp let alone two. Honestly I doubt you’re using more than 2wpc of one amp. No idea why you would want a 240 wpc amp to drive tweeters and another to drive the midrange. Seems to me you’re going the wrong direction. That said if you have them try it.

Thanks, in what way do you mean I am going in the wrong direction? I agree, with these particular speakers I have plenty of power driving them with my current solo Mc2125 but I no have my dads Mc2120 and I don’t intend to sell it so I may as well use it. Are you saying this would deteriorate my current sound?

Go vertical.

I have a biamp set up and I use solid state for the bass drivers and tube amplifiers for the upper drivers.  I use MC 901 McIntosh monos to achieve this. It’s working out really well for 802 d3 Bowers speakers.  It’s definitely a lot of power.  Maybe I could achieve the same result with 300 W mono tube amplifiers and be just as happy without the biamp.  But I’m very happy with what I’ve got.

You’re got very sensitive speakers and I suspect Will have no problem using tubes for the bass drivers.

I’m with Glennewdick on this.  You inherited Dad’s amp, and you want to incorporate it into your already well equipped system…very understandable…but your system simply doesn’t need it. Put the 2120 on a shelf in a place of honor, or develop a second system built around it, or…best idea…get different speakers without powered woofers, where one amp drives the passive woofers and the other both mids and tweeters.  If it must be Klipsch, something like KLF-30s, Cornwalls, or the like.  You will need to redo your speaker wires.

The possible advantage is eliminating the passive crossover network at the speaker but you have to replace it with an electronic crossover ahead of the amplifiers. Experimentation is required.