RB-1080 and 4ohm's?

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  • jrh
    Junior Member
    • Aug 2005
    • 5
    #1

    RB-1080 and 4ohm's?

    Hey all. Question, I'm kicking around the idea (as in I might buy it today) of adding a RB-1080 to my 1056 receiver. The 1080 would be driving a pair of Axiom M80ti's which are a 4 ohm speaker. I'm sure this is a dumb question, but how does the 1080 do driving a 4 ohm load? The specs call out 200x2 at 8ohms but I'm not seeing anything about bridging it to 4ohms on the Rotel site.
    I might as well get additional thoughts on this also...I have the option to pick up a used Classe CA-150 (it's probably 5 years old but in perfect shape) which is 150x2 at 8ohms or 300x2 into 4ohms. Do you guys recommend one over the other? Thanks everyone!
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    • Taito
      Senior Member
      • Sep 2004
      • 226
      #2
      Hi jrh, The 1080 is fine when driving 4 Ohm loads (bridging is something different). Information from an independent review saying that they had measured the power output of the 1080 at closer to 250W continuous into 8 Ohms and a little over 400W into 4 Ohms. Unfortunately I cannot remember which magazine this review was in. I have a 1080 which I use to drive JM Lab Cobalt 826S's and love it.

      I am not familiar with the Classe amp, but people in Club B&W generally prefer Classe to Rotel. Check it out. Hope this helps, Ben
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        • thyname
          Senior Member
          • Jan 2005
          • 358
          #3
          Greeting there from a fellow Axiom owner!! I have RB-1080 as well with RC-1070, but with Axiom M60s rated at 8 Ohms. 1080 has no problems whatsoever driving 4 Ohms speakers. I have heard they may output 350 wpc with 4 Ohms loads.
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            • Marlboroman
              Member
              • Aug 2005
              • 73
              #4
              The Rotel tech support guys say that the rated output for the RB-1080 into 4 ohms is 300 watts per channel. Hope that helps.

              SM
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                • RickF
                  Member
                  • Apr 2005
                  • 52
                  #5
                  Jrh, I am currently running a pair of M80ti's with the RB-1080 and really do like the combination. I have an RC-1070 preamp that I ran with with the 1080 specifically for a little while in 2 ch stereo only and then hooked up the 1080 through the pre-outs on my H/K 635 to run the 80s as the two front mains in a 5.1 system...great combination.

                  The RB-1080 will drive those 80s with no problemo whatsoever, believe me!
                  Last edited by RickF; 05 September 2005, 06:16 Monday.
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                    • lvhung
                      Senior Member
                      • Jun 2005
                      • 301
                      #6
                      200W is may not ideal
                      at lower level listening
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