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Thread: A curious thing has happened?

  1. #1
    Join Date: Nov 2019

    Location: Lincolnshire, UK

    Posts: 17
    I'm Stephen.

    Default A curious thing has happened?

    Following earlier advice, I bought a pair of HiFi grade 6.0mm van Damme speaker cables to connect my Myryad MP100/MA120 pre/power amp to my Kef Reference Series Model 2 speakers.
    I could hear a definite improvement when playing cds through my Naim cd player.
    I then decided to experiment with bi-wiring, with my QED Silver Anniversary cables to the LF and the van Damme to the HF.
    When I switched on the amp I noticed a hum from both speakers which was not there before. Not loud, but noticeable, not audible when listening to music. The hum seems to be slightly worse when selecting the "aux" input to which I connect phono preamp.
    I would be interested to know if anyone had experienced this before. Any comments or suggestions would be gratefully received.
    Perhaps I should just forget bi-wiring?

  2. #2
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,586
    I'm Lawrence.

    Default

    Can you send photos of the connections at the back of the amp and speakers please?

  3. #3
    Join Date: Nov 2019

    Location: Lincolnshire, UK

    Posts: 17
    I'm Stephen.

    Default

    Quote Originally Posted by Lawrence001 View Post
    Can you send photos of the connections at the back of the amp and speakers please?
    Will do, as soon as domestic duties allow!!

  4. #4
    Join Date: Jan 2009

    Location: Sheffield - UK

    Posts: 6,813
    I'm Mark.

    Default

    I’m afraid something is wrong then (not the domestic duties bit ), Bi-wiring shouldn’t reveal, or cause, any hum. I suspect some other connection issue which has accidentally been caused whilst swapping cables around behind your amp.

    100% Analogue

  5. #5
    Join Date: May 2008

    Location: Surrey

    Posts: 6,343
    I'm Rob.

    Default

    You did remove the links between the HF and LF speaker connections?
    Buy Bose...And get your parking validated!.

    https://youtu.be/ZCBe7-6rw4M

  6. #6
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 63,233
    I'm Grant.

    Default

    cables might be picking up rf etc try rerouting them away from other ones and see if it varies/goes away.. as said above check the links
    Regards,
    Grant .... ؠ

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  7. #7
    Join Date: Jan 2009

    Location: Sheffield - UK

    Posts: 6,813
    I'm Mark.

    Default

    Normally that only happens if you are using very high sensitivity speakers (over100dB) and the Kef’s don5 fit into that category.

    Leaving the links in shouldn’t cause hum either.

    100% Analogue

  8. #8
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 42,158
    I'm Geoff.

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    Quote Originally Posted by YNWaN View Post
    Leaving the links in shouldn’t cause hum either.
    No. But it makes bi-wiring even more pointless (in my view ).
    "when common sense, logic and plausibility are excluded. All that remain are foolishness and lies"

  9. #9
    Join Date: Jan 2009

    Location: Sheffield - UK

    Posts: 6,813
    I'm Mark.

    Default

    - perhaps (though I’ve heard more benefits from bi-wiring than bi-amping) .

    100% Analogue

  10. #10
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,586
    I'm Lawrence.

    Default

    Quote Originally Posted by walpurgis View Post
    No. But it makes bi-wiring even more pointless (in my view ).
    I thought that but maybe having two guages and materials would still help, it would be like a hybrid cable.

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