Beomaster 4400, bump on the speakears

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Home Forums Product Discussion & Questions BeoMaster Beomaster 4400, bump on the speakears

Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
    Posts
  • #41776
    lollo
    BRONZE Member
      • Topics Started 1
      • Total Posts 3

      Hi to all, I’m an old enthusiast of B&O products. My collection began over 50 years ago with a wonderful Beomaster 5000. Then came the Beomaster 1400, 3000, 1900, 3300, Beossound 3000 mk2 and now the Beomaster 4400. I just bought this last one and it works very well but I have a doubt. When I turn it on there is a bump noise on the speakers. I ask you if it is normal because I saw from the wiring diagram that there is a relay but I think it is connected to the protection device and not instead to a delay in connecting the speakers to avoid this. Someone can please clarify this. Thank you.

      #41777
      chartz
      GOLD Member
        • Burgundy
        • Topics Started 3
        • Total Posts 228

        Hi,

        The bump is normal. The relay is on the PSU rails, not the speakers.

        #41778
        lollo
        BRONZE Member
          • Topics Started 1
          • Total Posts 3
          1. Ok, thank you. I found a stupid but easy way to avoid the bump.  Just turn on the beomaster with the speakers unplugged :-). B regards
          #41779
          chartz
          GOLD Member
            • Burgundy
            • Topics Started 3
            • Total Posts 228

            Or use the speaker switch, perhaps. ?

            #41780
            Glitch
            BRONZE Member
              • Topics Started 15
              • Total Posts 313

              lollo:  You might want to put a multimeter across the speaker outputs and check the DC offset voltage. This should be very close to 0.0V. Sometimes power-on “thumps” are normal/unavoidable, other times they are indicative of something else. It is hard to judge what you are actually experiencing from the information that you provided.

              Glitch

              #41781
              lollo
              BRONZE Member
                • Topics Started 1
                • Total Posts 3
                • Ok, thank you. I will measure with the multimeter if there is Dc voltage on the speakers after switching on the beomaster.  If so, it would be a regulation problem of the final stage of the amplification which should thus be verified and investigated. But probably the bump is normal as Chartz reported. Yes Chartz, I use the switch to disconnect the speakers :-).
                #41782
                Glitch
                BRONZE Member
                  • Topics Started 15
                  • Total Posts 313

                  My assumption was that you were experiencing something different than with your other/previous B&O receivers, otherwise you wouldn’t have asked the question.  If there is an issue, there are multiple things that can cause a speaker thump.

                  Glitch

                  #41783
                  chartz
                  GOLD Member
                    • Burgundy
                    • Topics Started 3
                    • Total Posts 228

                    Don’t worry, the 4400 has it with 0 mV offset. Not a problem really. I’ve been hearing that thump every single day for 10 years now, ever since I restored it!

                    My 1967 Beolab 5000 has it too.

                    As an aside, the 4400 sounds extremely good, probably my best B&O receiver.

                  Viewing 8 posts - 1 through 8 (of 8 total)
                  • You must be logged in to reply to this topic.