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  • Receiver power and external amps

    I still have a few questions about adding an external amp and I'm hoping to learn about the differences between receivers.


    My speakers are the rockets - rs750, rsc200, and 250s as surrounds. I dont listen at ear bleeding levels, but I do enjoy loud over say moderate levels (I know that's about as subjective as you can get lol).

    I started with a Yamaha RX-V663 amp a few years ago. I still think it has a great features for the price and did quite well. I wasn't impressed with YPAO and figured more power might help. I ended up selling this to a friend and found a great deal on an Onkyo SR805. There is a noticeable difference between the Yamaha and the Onkyo. A large part of this might by Audyssey vs YPAO, but regardless the sound is better to me.

    I had read about the power ratings of the Onkyo and they are VERY good for a receiver, I believe 160 watts per channel with 5 channels driven. I think another source had similar power, its VERY high for a receiver. For reference the Yamaha 663 was about 4x watts under the same conditions.
    I don't believe there would be a big difference between say 45 watts and 60 watts, I think doubling of power would be a start. My thought was the Onkyo handily does this, could this be a factor? I know the x06 models had a big drop in power and many complaints.

    I'm considering an external amp, but I dont know if the difference will be noticeable. My original plan was to add an amp to the Yamaha, but the Onkyo had such good power I thought I'd try it and see how it does. I'm quite happy with it now, but the audio bug has me wondering if I'm missing something.

    Any thoughts on this? I hear (no pun intended) the rockets are quite poewr hungry. They do definitely come alive at higher listening levels, much more than the x-series imo. The ice series amp from Pioneer look great, but their tested power is less than my current receiver. I would like a big difference from an external amp, but I dont know the importance of electronics in the grand scheme of things (room, speakers, etc). Any thoughts and/or experiences would be welcomed, thanks!

  • #2
    From Home Theater Magazine. All figures are 0.1% distortion and 8ohm loads

    Yamaha 663 : 42.6 watts 5 channels driven (this was my old receiver)
    Yamaha 1065: 50.4 watts 5 channels driven
    Yamaha 3900: 69.2 watts 5 channels driven
    Yamaha Z7: 63.0 watts 5 channels driven

    Onkyo 608: 82.3 watts 5 channels driven
    Onkyo 807 105.5 watts 5 channels driven
    Onkyo 805: 162 watts 5 channels driven
    Pio SC-27: 111.3 watts 5 channels driven
    Marantz 6004: 73.4 watts 5 channels driven
    Denon 4310: 113.8 watts 5 channels driven


    External Amp:
    Cinenova Grande 7 Channel Amplifier: 293 watts 7 channels driven at 0.1% distortion. They should call this the rainmaker!

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    • #3
      Hard to say without knowing more about what your situation is (other gear, room acoustics) - but I'd probably put the money to use elsewhere first, I think you're in good shape in the power department.

      Acoustic treatments? Subs?
      my dedicated HT build thread (AVS)

      Comment


      • #4
        Originally posted by fitzwaddle
        Hard to say without knowing more about what your situation is (other gear, room acoustics) - but I'd probably put the money to use elsewhere first, I think you're in good shape in the power department.

        Acoustic treatments? Subs?
        Thanks for the reply.

        Sadly no accoustic treatments. I was hoping to get a few panels and corner bass traps, not sure when that will happen though. This is in the living room, I'd guess maybe 12x14x9? Maybe a bit bigger, but definitely not a large space.

        I have the Onkyo receiver, mainly use the ps3 for movies. Squeezebox classic for music. I'd say 75% movies and 25% music. Some gaming here and there. I have dual mfw-15s to take care of the low end. Who knows if they are 100% and/or how long they will stay that way.

        I also have an l/c/r setup with Energy AC300s. They are more sensitive at 90db. Each has a pair of 5.5" drivers, they sound great and are more airy/open sounding than the rockets. However, they lack the punch that the rockets deliver, which I like for ht. The other thing to note is the rockets (even the sig version) are a bit laid back. It almost seems you need more volume to bring out the clarity and details (at least compared to the Energys).

        Comment


        • #5
          Home Theater Mag

          Those are benched power ratings for the AVRs right, not just Manufacturer listed?

          The Onkyos are known for their umph compared to other brands as far as I can tell paging through AVSforum.


          The rockets need more power because they are less sensitive, right? Is that why they need more punch?

          You could always spring for an Emotiva XPA-3 or something for your L/C/R and see what happens!

          That was recommended to me prior to getting the UPA-7.....
          -Greg

          Some people are born on third base and go through life thinking they hit a triple. - Barry Switzer

          HO's Basement Take 2

          Comment


          • #6
            Originally posted by HuskerOmaha
            Those are benched power ratings for the AVRs right, not just Manufacturer listed?

            The Onkyos are known for their umph compared to other brands as far as I can tell paging through AVSforum.


            The rockets need more power because they are less sensitive, right? Is that why they need more punch?

            You could always spring for an Emotiva XPA-3 or something for your L/C/R and see what happens!

            That was recommended to me prior to getting the UPA-7.....
            Correct, those are the bench tests. In that case, the Onkyos look quite strong.

            I believe the rockets mains are 88db, the center channel being 90db. They seem to like power though. They definitely sound better at moderate-loud levels rather than low listening levels.

            My thoughts were am I missing a "lot" without the additional power. I dont think so, maybe I just need to test and see for myself or listen to someone with a setup. I also didn't know if using a receiver as the pre/pro would be a significant disadvantage.

            Happy Holidays everyone! :huge:

            Comment


            • #7
              2- Channel Amp

              I will have a 9 channel setup. 5.1+Heights for HT, and add in 2-in ceiling speakers in the bathroom/bar for stereo (football, etc).

              What external amp would you recommend for those 2-channels?
              I could then get a cheaper AVR that is 7.2 instead of 9.2.

              Or I could jump for Audyssey XT32...............
              -Greg

              Some people are born on third base and go through life thinking they hit a triple. - Barry Switzer

              HO's Basement Take 2

              Comment

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