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INTRODUCTION - PLEASE READ FIRST TO UNDERSTAND THIS FORUM!

"This Harbeth User Group (HUG) is the Manufacturer's own managed forum dedicated to natural sound from microphone to ear, achievable by recognising and controlling the numerous confounding variables that exist along the audio chain. The Harbeth designer's objective is to make loudspeakers that contribute little of themselves to the music passing through them.

Identifying system components for their sonic neutrality should logically proceed from the interpretation and analysis of their technical, objective performance. Deviations from a flat frequency response at any point along the signal chain from microphone to ear is likely to give an audible sonic personality to the system at your ear; this includes the significant contribution of the listening room itself. To accurately reproduce the recorded sound as Harbeth speakers are designed to do, you would be best advised to select system components (sources, electronics, cables and so on) that do not color the sound before it reaches the speakers.

For example, the design of and interaction between the hifi amplifier and its speaker load can and will alter the sound balance of what you hear. This may or may not be what you wish to achieve, but any deviation from a flat response is a step away from a truly neutral system. HUG has extensively discussed amplifiers and the methods for seeking the most objectively neutral among a plethora of product choices.

HUG specialises in making complex technical matters simple to understand, getting at the repeatable facts in a post-truth environment where objectivity is increasingly ridiculed. With our heritage of natural sound and pragmatic design, HUG is not the best place to discuss non-Harbeth audio components selected, knowingly or not, to introduce a significantly personalised system sound. 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 offerings there. There is really no on-line substitute for time invested in a dealer's showroom because 'tuning' your system to taste is such a highly personal matter. Our overall objective here is to empower readers to make the factually best procurement decisions in the interests of lifelike music at home.

Please consider carefully how much you should rely upon and be influenced by 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, loudness and room treatment, not necessarily leading to appropriate equipment selection and listening satisfaction for you. Always keep in mind that without basic test equipment, subjective opinions will reign unchallenged. With test equipment, universal facts and truths are exposed.

If some of the science behind faithfully reproducing the sound intended by the composer, score, conductor and musicians over Harbeth speakers is your thing, this forum has been helping with that since 2006. If you just want to share your opinions and photos with others then the unrelated Harbeth Speakers Facebook page http://bit.ly/2FEgoAy may be for you. Either way, welcome to the world of Harbeth!"


Feb. 2018
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Amplifier servicing - Audiolab?

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  • Amplifier servicing - Audiolab?

    Both my Audiolab and Quad 303 amplifiers are rather long in the tooth and probably require servicing. For the 303, my first thought was Quad themselves. Audiolab is now based in China, so they probably recommend somewhere in England. Do any members of this Forum recommend an engineer they have received good service from ?
    I live near Oxford, so would prefer not to have to ship such heavy items.

  • #2
    IAG may help?

    Miles, try to contact b/m phone, they should recommend you some good local audio engineer / service in your area:

    IAG Service Department, Unit 4, St Margarets Way,
    Stukeley Meadows Industrial Estate, Huntingdon, Cambs, PE29 6EB
    Telephone : 01480 452561
    e-mail : stevehu@iaguk.co.uk

    In Poland it worked.

    All the best.

    {Moderator's comment: QUAD is part of the International Audio Group}

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    • #3
      Audiolab service engineer

      I had my 8000 series power amps and integrated serviced a couple of years ago, relays changed, re-biased, output and driver device solder joints checked, oscilloscope check. Don't know if he is still current but I can recommend most highly:

      Kevin Green - kevingreen@tesco.net
      36 Merganser Drive, Bicester, OX26 6UQ

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      • #4
        "Customer is king!" (but manufacturers don't like to admit issues...)

        Originally posted by audiolab View Post
        I had my 8000 series power amps and integrated serviced a couple of years ago, relays changed, re-biased, output and driver device solder joints checked, oscilloscope check. Don't know if he is still current but I can recommend most highly:

        Kevin Green - kevingreen@tesco.net
        36 Merganser Drive, Bicester, OX26 6UQ
        Good luck - that could be a useful contact.

        When customer service doesn't live up to expectations and the customer feels at the end of the road with a brand, Eur 150,000 is as good as scrap metal .... here.
        Alan A. Shaw
        Designer, owner
        Harbeth Audio UK

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        • #5
          Jaguars?

          i'm in Canada and we would see this everyday,sometimes twice a day,those Jaguars were horrible! Really a bad automobile,seems the electrical systems were engineered by the competition hahahahahahahahahaaaaaa.

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          • #6
            Quad 303 upgrades?

            Audiolab have UK offices and I last heard the original engineer was still there (Sean if I remember correctly - so little went wrong they didn't need a large service dept). To be honest, if it ain't wrong, don't 'fix it' is the mantra on Audiolab of old..

            As for the 303, the original supply caps may either be leaky or at least well down in performance. Depending on what you want to do, you can either do straight new for old using the same values, although it has been said that increasing the values of both supply and output caps makes for an improvement (I'm being careful here as I haven't seen measured proof). I do respect the dada/Quad blogspot though and there are pages of articles on restoring old Quads on there, with objective proof often offered I feel.

            I love the 303 when it's working right. Mine had been fully rebuilt with all new components and the big caps were original value Elnas and a smattering of Ansar and Black Gates here and there. Sounded fine to me, but I doubt it was so audibly different to a well sorted 'original' that I could tell any difference :)

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            • #7
              Amp after-care expert recommended

              Originally posted by audiolab View Post
              I had my 8000 series power amps and integrated serviced a couple of years ago, relays changed, re-biased, output and driver device solder joints checked, oscilloscope check. Don't know if he is still current but I can recommend most highly:

              Kevin Green - kevingreen@tesco.net
              36 Merganser Drive, Bicester, OX26 6UQ
              Yes, Kevin Green is excellent.

              Comment

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