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Thread: M30 & SHL5 output

  1. #1
    tomsmith Guest

    Default M30 & SHL5 output

    What is the maximum acoustic output(dB) with 2 speakers in-room, of the M30 & SHL5

  2. #2
    Join Date
    Jan 2006
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    South of England, UK
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    Default Re: M30 & SHL5 output

    The honest answer is 'something over 100dB at 1m' but as I've never measured the maximum sound pressure level (and respect my ears too much) I can't be precise.

    Not only that, tere are many factors which must be taken into account to give a meaningful number such as ....

    a) how far away is the microphone?
    b) are both speakers playing exactly the same (mono) signal?
    c) is the signal bandwidth-limited so that, for example, all deep bass and extreme HF are eliminated and do not reach the speakers?
    d) are we measuring long-term maxima or just a burst, and in both cases over precisely what time period?
    e) is permanent but minor damage permitted to the speakers?

    Harbeth - and indeed all predecessor BBC-monitor speakers are designed to be listened to at a moderate level. You can get an idea of what I think is moderate from the Video Vault of a listening test underway.
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK

  3. #3
    tomsmith Guest

    Default Re: M30 & SHL5 output

    Do they both have the same mid/bass driver & crossover for that driver?

  4. #4
    Join Date
    Jan 2006
    Location
    South of England, UK
    Posts
    4,460

    Default Re: M30 & SHL5 output

    They have the same driver. They can't have the same crossover because a) the cabinets are of different sizes b) they have different tweeters c) .....
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK

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