rotel rsx-1056 background hiss noise

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  • Elvis
    Senior Member
    • Jan 2005
    • 106

    #46
    Kens,my complaint is with hiss in center and surrounds when listening in 2ch mode.Almost any avr/pre/pro will have a hiss (some more some less)in active channels,thats normal.As you said the Panasonic mutes other channels not used,as do most all other designs,thanks for checkin' it out.

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    • GregoriusM
      Super Senior Member
      • Oct 2000
      • 2755

      #47
      I get the hiss no matter what mode I'm in and I get it in the front 3 channels. I haven't hooked up the surrounds yet.

      I just got the unit hooked up on Thursday.

      IF I cannot another 1056 without these problems, or a definite timeframe for fixing them, then I'll keep the 1056 but get a written agreement that when the 1057 comes out in a year or two, that I'll get the full payment I made for the 1056 to be applied to the 1057, which will no doubt have fixed these problems.

      I paid 2 large ones, including taxes, for this 5.1 receiver. That's certainly not a HTIB. There should be extremely low hiss, if any. I can hear the hiss from my center channel from 6 feet away.

      Not to mention the pop problem.

      I had NO problems like this with my lowly Denon 3300, which was a 5 year old product until I sold it and bought the 1056 last Thursday.
      .
      Gregor

      Comment

      • Kevin P
        Ultra Senior Member
        • Aug 2000
        • 10812

        #48
        Greg, did you try disconnecting all your sources (esp. cable or satellite) to try and rule out a ground loop or source issue as the cause for your hiss?

        A hiss audible from inches away is normal. Every receiver and amp I've ever owned has done this. If it's audible from 6 feet away, then THAT's a problem.

        Does your center channel hiss get louder when you turn the volume up and softer when you turn it down?

        Comment

        • GregoriusM
          Super Senior Member
          • Oct 2000
          • 2755

          #49
          I am returning my 1056 and getting a replacement, which they will update to the latest software and flash the eprom.

          I just had too many problems.

          The hiss, the popping, 2 times freezing up and I had to turn it on and off using the back switch, another time just turning off (these are when I was changing parameters in system setup), the mute doesn't always totally mute - I can still hear a slight sound from the input, etc.

          So, I'll let you know what happens with the next one. I'm thinking I just got a dud. It happens with any manufacturer.

          I should get it on Friday.
          .
          Gregor

          Comment

          • basementjack
            Senior Member
            • Dec 2004
            • 191

            #50
            Just my 2Cents, but this has been a huge discussion on hiss, and there hasn't been a single mention of speaker efficiency - the effect of any hiss however minimal will be 2x louder with a 3db increase in efficiency - in other words - hiss will be a much bigger issue for someone with 93db efficient speakers over someone with 85 db efficient speakers...

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            • NewBuyer
              Senior Member
              • Feb 2005
              • 122

              #51
              Question please, about basementjack's comment:

              Is it really that simple? What I mean is, since the hiss comes only through the tweeters (which need so much less power than the woofers), does the speaker's raw efficiency rating really apply to both tweeters and woofers equally?

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              • Elvis
                Senior Member
                • Jan 2005
                • 106

                #52
                I'm not sure how eff.rating would make the 1056 NOT mute center and surrounds in 2ch mode? That is the hiss issue,they aren't muted.

                Comment

                • Bam!
                  Super Senior Member
                  • Jan 2004
                  • 2458

                  #53
                  ...it's true, my speakers have an efficiency of 103DB's. I hear every little piece of sound that the amp offers, being both good and bad. A hiss will be a lot more apparent on speakers offering higher efficiency.

                  I also have pro ac 2.5's that have 86 db efficiency and I don't hear any hiss what so ever unless I crank the volume at Mack 8!

                  anyways just my 2 pesos.
                  Got a nice rack to show me ?

                  Comment

                  • GregoriusM
                    Super Senior Member
                    • Oct 2000
                    • 2755

                    #54
                    This is the second 1056 that has hiss problems, except that now it is hiss/buzz/hum.

                    My dealer is talking to Rotel to see what gives.

                    I hope they can rectify this situation.
                    .
                    Gregor

                    Comment

                    • Elvis
                      Senior Member
                      • Jan 2005
                      • 106

                      #55
                      Good luck.

                      Comment

                      • NewBuyer
                        Senior Member
                        • Feb 2005
                        • 122

                        #56
                        I agree, good luck. I really like the Rotel sound, EXCEPT for the hiss/buzz/hum!

                        Comment

                        • GregoriusM
                          Super Senior Member
                          • Oct 2000
                          • 2755

                          #57
                          My hiss is from the tweeters, but the buzz/hum is from the tweeters and mid/bass driver.

                          I've put it on a separate circuit and will try today and unplug all of the inputs, and see what happens.

                          Also, the hum/buzz is there half the time and half the time it isn't.

                          Arggggghhhh!!!
                          .
                          Gregor

                          Comment

                          • alienone
                            Junior Member
                            • Apr 2005
                            • 7

                            #58
                            Have you tried to put in a net filter it could be line noise from the power outlet it helped me

                            Comment

                            • GregoriusM
                              Super Senior Member
                              • Oct 2000
                              • 2755

                              #59
                              What is a "net filter"?
                              .
                              Gregor

                              Comment

                              • alienone
                                Junior Member
                                • Apr 2005
                                • 7

                                #60
                                I don't know if I use the right word but it reduce spikes and other noise generated from other equipment from your power outlet here is a link

                                Comment

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