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  1. #1
    mad-moon mad-moon's Avatar
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    Help with speaker mode

    Can anyone help with speaker mode..can you tell me what these modes are..excluding stereo and mono of course...[IMG][/IMG]
    Last edited by mad-moon; 09-02-2012 at 10:15 AM.

  2. #2
    In the trade Wammer Valvebloke's Avatar
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    Double post

  3. #3
    In the trade Wammer Valvebloke's Avatar
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    What model is the amp ? Knowing that you can almost certainly find the instruction book on t'internet. But here's a wild guess:

    Mono: Sums both the input signals and feeds this sum to both speakers
    Right (Left): Feeds the right (left) input signal to both speakers
    Stereo: Left signal to left speaker, right signal to right speaker
    Rev(erse): Left signal to right speaker, right signal to left speaker

    VB

  4. #4
    Too many turntables Beobloke's Avatar
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    ^^^ Wot 'e said is spot on ^^^

    I've never been sure why anyone would want to use any of the settings offered (except the reverse setting if you suspect you have a speaker problem) but it's nice to know that you have the option, I suppose!
    Instant human being - just add coffee. Do not stir.

  5. #5
    mad-moon mad-moon's Avatar
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    Quote Originally Posted by Valvebloke View Post
    What model is the amp ? Knowing that you can almost certainly find the instruction book on t'internet. But here's a wild guess:

    Mono: Sums both the input signals and feeds this sum to both speakers
    Right (Left): Feeds the right (left) input signal to both speakers
    Stereo: Left signal to left speaker, right signal to right speaker
    Rev(erse): Left signal to right speaker, right signal to left speaker

    VB
    Hello Valvebloke..It is an old Rotel RX-800. looking at your reply..the left right sum seems to make common sense to me now...left channel..feeding the left stereo channel into both speakers and vice versa for the right channel...can't really here a vast amount of difference..the reverse option gives an almost mix between stereo/mono..not quite stereo and not quite mono..and sort of takes away some of the dynamics.
    Last edited by mad-moon; 09-02-2012 at 11:28 AM.

  6. #6
    Too much time on my hands SergeAuckland's Avatar
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    Quote Originally Posted by Beobloke View Post
    ^^^ Wot 'e said is spot on ^^^

    I've never been sure why anyone would want to use any of the settings offered (except the reverse setting if you suspect you have a speaker problem) but it's nice to know that you have the option, I suppose!
    At the time of this amplifier, there was still a fair bit of mono equipment in use, especially tape recorders and tuners. These only had a single output cable, and the ability to feed L (or R) into both channels for dual-channel mono was very useful.

    Channel reverse wasn't hugely useful, except it would identify bad wiring, if the violins were on the right! One setting which was useful (but wasn't on the above amplifier) was a mono with one channel inverted switch. This could be used to test channel balance in a cartridge, play a mono LP and switch to mono with one channel reversed. Anything still audible indicated what and where the channel imbalance was.

    S.

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