HUG - here for all audio enthusiasts


"This Harbeth User Group (HUG) is the Manufacturer's own managed forum dedicated to natural sound, realisable by controlling the confounding variables between tthe microphone and the listeners' ears.

For example, the design of and interaction between the hifi amplifier and its speaker load can and potentially will alter the sound balance of what you hear. To reproduce the sounds captured by the recording microphones, as Harbeth speakers are designed to do, you would naturally select system components (sources, electronics, cables and so on) that do not color the sound before it reaches the speakers.

Identifying components for their system neutrality should, logically, start with the interpretation and analysis of their technical, objective performance, as any and every deviation from a measurably flat frequency response at any point along the serial chain from microphone to ear is very likely to cause the total system to have an audible sonic personality. That includes the contribution of the listening room itself.

HUG specialises in making complex technical matters simple to understand, aiding the identification of audio components likely to maintain a faithful relationship between the recorded sound and the sound you hear. With our heritage of natural sound, HUG cannot be really be expected to guide in the selection, approval, endorsement or even discussion of equipment that is intend to introduce a significantly personalised sound to the audio signal chain. For that you should do your own research and above all, make the effort to visit an Authorised Dealer and listen to your music at your loudness on your loudspeakers through the various electronics offered there. There is no on-line substitute for that time investment in a dealer's showroom.

If you desire to intentionally tune your system sound to your personal taste, please consider carefully how much you should rely upon the subjective opinions of strangers. Their hearing acuity and taste will be different to yours, as will be their motives and budget, their listening distance, listening loudness and listening room treatment, not necessarily leading to appropriate equipment selection and listening satisfaction for you.

Alternatively, if faithfully reproducing the sound intended by the composer, score, conductor and musicians over your speakers is your audio dream, then understanding something of the issues likely to fulfill that objective is what this forum has been helping with since 2006. Welcome!"

Jan. 2018
See more
See less

Naim "Plop" - serious problem for speakers or not

  • Filter
  • Time
  • Show
Clear All
new posts

  • Naim "Plop" - serious problem for speakers or not

    Dear Alan,

    as posted in another thread I currently tested a Naim Nait 5i/2 to replace my Marantz PM6003. I defintively consider the combination of the Naim with my Compact 7 ES3 over the set up with the Marantz.

    BUT: I prefer to switch my System off when not it use. So there is that (obviously) common "plop"-issue when switching on the amp making the bass driver moving inwards.

    My question is: Is this critical for my speakers or not.
    Your advice would be very much appreciated.

    Best Regards from Germany

  • #2
    NAIM plop

    Hi Oliver,

    I'm both a Harbeth and Naim dealer in the US and understand why you like the Naim/Harbeth combination. I have not encountered any problems as a result of the "plop" you refer to. Additionally, Naim recommends leaving their amplifiers power on as much as possible to avoid have to go through warm-up every day, I leave the amps powered on. However, during an extended absence or a pending storm, I usually power down the system to avoid possible electrical damage.



    • #3
      NAIM plop

      Hello Oliver, I'm a Naim user for about 17 years now and have grown used to the "plop'' sound when switching off (actually there is also a slight "thump'' when switching on as well). I don't have the technical explanation for these noises but I can say they do not harm the speakers at all.

      Incidentally, I keep my amplifiers on all the time and only switch off when I go away on holiday. I know this is not very "green'' of me but I believe this is why they have lasted so long (and are still working fine).


      • #4
        NAIM plop

        read this for some idea
        Thud sound when power down

        Alan commented reversing the polarity of the connection from the amplifier to the speaker. Moving inward first then outward is more damaging on the driver.


        • #5
          Plop on switch off not on

          Originally posted by ernesto View Post
          BUT: I prefer to switch my System off when not it use. So there is that (obviously) common "plop"-issue when switching on the amp making the bass driver moving inwards.
          Ditto on the responses above. Another Naim user here.

          Nevertheless, I am little curious about the "plop" sound that moves the driver of the speaker. Usually the drivers will not move with the "plop". Also, the "plop" normally occurs when switching off the amp, not switching on.

          Another thing is the "plop" sound will be significantly subdued if a power supply is used in conjunction with the amps. Unfortunately the power supply can only be added to the Nait XS, Supernait and all the preamps.

          There are many Harbeth users using Naim amps in their systems if you check the Naim forum. There isn't any report on speaker damage with the "plop" as far as I know. Personally I do not think this "plop" is detrimental to the speakers although initially like you I had fears when getting my first Naim amps sometime last year. Somehow I have got used to it and for the fact that I will never switch off the amps and leave them permanently on unless I am away for a long holiday break.



          • #6
            NAIM and plop

            +1. Naim user too but I experience the 'plop' sound on turn on and turn off! I am using a NaimUniti. The 'plop' sound is quite gentle and in no way startling. No worries with the 'plop' as Naim has assured this is quite normal with most of their amplifiers.

            Naim could easily put a diode for soft start but they felt that any additional electronic parts would only be detrimental to the sound. In any case, I hope you leave the amplifier on 24/7!


            • #7

              @ all
              thank you very much for your comments and useful input.
              I have decided to opt for the better sound, keep the Naim and leave it on. The Marantz has to go.