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HUG - here for all audio enthusiasts

Since its inception ten years ago, the Harbeth User Group's ambition has been to create a lasting knowledge archive. Knowledge is based on facts and observations. Knowledge is timeless. Knowledge is human independent and replicatable. However, we live in new world where thanks to social media, 'facts' have become flexible and personal. HUG operates in that real world.

HUG has two approaches to contributor's Posts. If you have, like us, a scientific mind and are curious about how the ear works, how it can lead us to make the right - and wrong - decisions, and about the technical ins and outs of audio equipment, how it's designed and what choices the designer makes, then the factual area of HUG is for you. The objective methods of comparing audio equipment under controlled conditions has been thoroughly examined here on HUG and elsewhere and can be easily understood and tried with negligible technical knowledge.

Alternatively, if you just like chatting about audio and subjectivity rules for you, then the Subjective Soundings sub-forum is you. If upon examination we think that Posts are better suited to one sub-forum than than the other, they will be redirected during Moderation, which is applied throughout the site.

Questions and Posts about, for example, 'does amplifier A sounds better than amplifier B' or 'which speaker stands or cables are best' are suitable for the Subjective Soundings area.

The Moderators' decision is final in all matters regarding what appears here. That said, very few Posts are rejected. HUG Moderation individually spell and layout checks Posts for clarity but due to the workload, Posts in the Subjective Soundings area, from Oct. 2016 will not be. We regret that but we are unable to accept Posts that present what we consider to be free advertising for products that Harbeth does not make.

That's it! Enjoy!

{Updated Nov. 2016A}
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Technical questions to Harbeth's designer

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  • #31
    Re: Removing Grilles

    Alan, how about fixing/stapling a short piece of fabric to the side of the frame of the grill, on both sides of the grill.

    So that when the user holds both the short pieces of fabric(short so as not to affect the looks of the speaker, if thats a concern at all), and grill can be remove w/o warping the grill frame.

    Comment


    • #32
      Re: Removing Grilles

      That's a very good idea. I'll talk it over with the grille maker ladies. I guess it's going to rely entirely on the strength of the glue.
      Alan A. Shaw
      Designer, owner
      Harbeth Audio UK

      Comment


      • #33
        Re: Removing Grilles

        Hello,all. I have the opposite problem with my Compact 7ES-2's. The grilles seem to be too loose in their channels and will buzz/vibrate at certain lower frequencies. Any suggestions for a fix on this? Thanks. Bob LaBarca

        Comment


        • #34
          Re: Removing Grilles

          Ah - steel and wood each with their own unique characteristics. This is quite easy: remove grilles, apply a little outward bias on both long sides and refit.
          Alan A. Shaw
          Designer, owner
          Harbeth Audio UK

          Comment


          • #35
            Tightening screws or not?

            Alan,
            Being a contented owner of numerous models over the years( and still hanging on to them) I am happy to say that if it is time to change my SHL 5 it's going to be the M40 for me. For that I need to buy another house.But in the meanwhile, I am wondering if I should attempt to tighten the screws on the front and rear panels as they may be lose after years of use and is there any advice on the level of tightness which allows the speakers to perform at it's best.
            Best Regards
            James Beltran
            Malaysia

            Comment


            • #36
              Active vs. Passive design

              Hi dear harberth designers
              I have a question about active vs. passive loudspeakers design,
              regarding the benefit of active loudspeakers design, among them are better crossover, more efficienty, better amplifier matching, more control on the frequency response and more, why don't Harbeth produce more active loudspeakers, and only have one model which is active, is it because the audiophile market is not mature enough for Active loudspeakers, or are there other reasons
              Regards
              Ofer

              Comment


              • #37
                Re: Active vs. Passive design

                Originally posted by oferab
                ... better crossover, more efficiency, better amplifier matching, more control on the frequency response and more
                Interesting question. Actually, the sonic advantages of Active are really small compared with passive. It is not true to say that an Active crossover is necessarily better - it is certainly much more complicated.

                In my opinion the correct way to design a speaker system is this:

                1. Design and optimise passive version. This then becomes the template for the active filter circuits.

                2. Design the active filters from the passive filter template.

                3. Adjust time delay etc. in the active if desired.

                Commercially, the hifi user wants maximum choice. This speaker + that amp. If he buys active he has no choice of amp. Not ideal for him. In the studio what they will pay for is convenience - they are not much interested in the active v. passive arguments which they really don't understand.
                Alan A. Shaw
                Designer, owner
                Harbeth Audio UK

                Comment


                • #38
                  Re: Removing Grilles

                  I brought home a brand new S-SHL5 yesterday. The grille fits so tightly I do not think I will ever be able to remove the grille to catch a glimpse of the drivers. Alan, how's the little video coming along? It will be useful for those who have problems removing the grille, including me.

                  Comment


                  • #39
                    Re: Removing Grilles

                    Could you email me privately with the serial numbers so I can investigate this please? Can you also tell me your room temperature now?

                    Since I'm not aware of any really tight grille/cabinets here I think expansion of the grille frame (steel) or cabinet due to temperature is a factor.

                    The video - yes, I will talk to our PR man about that next week.
                    Alan A. Shaw
                    Designer, owner
                    Harbeth Audio UK

                    Comment


                    • #40
                      Re: Removing Grilles

                      Hi Alan,

                      I've had the same problem with my grilles being too tight. In fact after my 6Moons article went live I was demoing the speakers for visitors and ended up tearing the grill fabric on one of the grilles while removing them. Any chance I can get it recovered?

                      Kind regards,

                      Jeff

                      Comment


                      • #41
                        Re: Removing Grilles

                        I cannot remove the grilles too, too tight!

                        Comment


                        • #42
                          Re: Removing Grilles

                          Not so. The grilles went on so they will come off. But, as I noted before, thermal expansion on the frame means that they can be very tight.

                          Please remember that we recommend all listening is with the grilles on because, maybe surprisingly, the frequency response is flatter with the SuperGrill on, not off.

                          There is absolutely no need to remove the grilles - ever.
                          Alan A. Shaw
                          Designer, owner
                          Harbeth Audio UK

                          Comment


                          • #43
                            Re: Removing Grilles

                            Alan, I have PM'ed you the info you requested. Thanks.

                            Comment


                            • #44
                              Re: Active vs. Passive design

                              Thanks for your detailed replay
                              I think that with active system, you get get a better integration of the components, where all the system is tuned in one place,
                              also you save the cost of the cases, and the cables
                              on the other hand, you need a pre amp, instead of an integrated amp
                              pepole who are using pre amp and seperate amp, will not have a problem
                              but the Audiophile market is not ready for that kind of solution, for myself,
                              I think it is better get a complete and tuned system, without having to search for the right amplifier

                              Comment


                              • #45
                                Re: Active vs. Passive design

                                Originally posted by oferab
                                ... I think that with active system, you get get a better integration of the components, where all the system is tuned in one place ...
                                I think that may be true but it is not necessarily true.

                                There are many very cheap active systems available (for the home musician market) which have cheap electronics, cheap drive units and cheap cabinets. They are acceptable to that market but not for our market. So, you can not assume that 'active solutions are always good' - it depends upon the details of the design and how much money is available for the designer to spend on components etc. etc..

                                We should again try and understand "what was in the mind of the designer" - perfection or profit?
                                Alan A. Shaw
                                Designer, owner
                                Harbeth Audio UK

                                Comment

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