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
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Bryston BackPac (PP60) mounted on backside of SHL5?

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  • Bryston BackPac (PP60) mounted on backside of SHL5?

    Hi everybody,

    I have a pair of Bryston PP60 which i like to mount on the back of SH5L speakers.

    Is it a problem because of cabinet 'thin-wall' panel construction? Thanks.
    regards, Al

  • #2
    Scres into cabinets - no

    Personally, I wouldn't do anything that would damage the beautiful Harbeth SHL5 cabinets. I just couldn't drive screws through without shedding tears.

    Why don't you mount the amp-packs on the stands or on the floor and run short lengths of cable to the terminals ?


    • #3
      Changing the damping by adding mass

      Apart from the question of whether putting holes in your cabinet is a good idea (my guess is, probably not), my understanding of Harbeth's design principle is that the thin-wall cabinet is supposed to resonate in a predictable way at non-audibly-objectionable frequencies, so that energy is not dissipated in ways and at frequencies the ear finds offensive.

      With that in mind, I have to imagine that bolting a rigid object of not-insignificant mass and surface area to one of the cabinet panels is going to affect the intended resonant behaviour of the whole cabinet, and therefore very possibly introduce an audible coloration that wasn't there before.


      • #4
        Rubber bushes?

        You could always use rubber bushings to partially decouple the amp pack, but I must agree with HiFi dave here that defacing any "domestic" Harbeth cabinet should be avoided for depreciation reasons if nothing else.. ;)


        • #5

          That's what i had guessed also. Now i have no doubt anymore. My stands will be open frames design, so no possibility to mount the amps on them.


          • #6
            'Don't do it!'

            As I'm reading this post, I can almost hear The Band's, Levon Helm singing, "Don't Do It, Please don't do it."


            • #7
              Added mass will have an effect

              While a rubber bushing would decouple, the additional mass would still be present and certainly alter cabinet resonance.


              • #8
                M40 amps?

                ....i thought it might work, because the m40.1 also have the amps backside....

                {Moderator's comment: No. Not M40.1. First/second generation M40. Pro active.}