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HUG - here for all audio enthusiasts

INTRODUCTION- PLEASE READ FIRST TO UNDERSTAND THIS FORUM!

"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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Test equipment (reference-standard microphones)

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  • Test equipment (reference-standard microphones)

    As I mentioned recently, we have recently invested several thousand dollars in new test equipment. Although Bruel & Kjaer has always been at the heart of our test set, we have not had the luxury of duplication across the various sites that I may need to measure speakers: on the production line, in the test bunker (for grading drive units), at the Old Dairy (open space for measuing) or The Stable (mini deadroom) or at home. I have made do with 'clone' amateur test equipment - especially microphones, and that has introduced a degree of uncertainly which has wasted valuable time.

    So, back to B&K, the best, the most accurate, with traceable standards and a very long life. For example, here is the actual curve (also supplied as a mini-CD) for the best of the new microphone capsules we have just purchased from B&K Denmark http://www.bksv.com/.

    As you can see from the curve below the yellow zone reresents +/- 1dB, and this specimen deviates from perfectly flat by a maximum of only about 0.5dB at the very highest frequencies and is, for all practical purpsoses, perfect. Bigger picture here: http://www.harbeth.co.uk/images/B&Krefmic640.png

    An accurate microphone, a reliable and known acoustic space - even if not a perfelcty relection free one, and a flat amplifier (another sad story) are paramount should you wish to design quality speaker systems.

    We now meet our ISO9001 obligations in this important area.
    Attached Files
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK

  • #2
    Frequency response of B&K microphone capsules

    Originally posted by A.S. View Post
    As you can see from the curve below the yellow zone reresents +/- 1dB, and this specimen deviates from perfectly flat by a maximum of only about 0.5dB at the very highest frequencies and is, for all practical purpsoses, perfect. Bigger picture here: http://www.harbeth.co.uk/images/B&Krefmic640.png

    An accurate microphone, a reliable and known acoustic space - even if not a perfectly reflection free one, and a flat amplifier (another sad story) are paramount should you wish to design quality speaker systems.
    I don't seem to be able to view the microphone frequency response curve mentioned above. Would it be possible to supply a working link?

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