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Thread: Bi Amping Quad 303's

  1. #1
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 5,274
    I'm Dan.

    Default Bi Amping Quad 303's

    Hi All

    I have a spare 303 which has just been fully recapped and serviced had the idea of Bi amping with my Tannoy 615's technically fine but finding the adaptors is a question can anyone help

    presume its left to left right to right to pre then + Trebal on the left and - Bass on the right right for my 615's? Y adaptors and interlink have been told i need
    [B] Pre & Power [/B\]
    Technics SU C909U with Quad 405 Power
    Turntable
    Thorens TD 125 MK1 , SME 3009 S2 Non Improved , Shure V15 II Cartridge , SME 2000 Plinth
    CD Transport & DAC & PSU
    Marantz 6005 , Beresford Caiman , Paul Hynes SR4
    Loudspeakers
    JPW Kit with Audax , Peerless and VOLT B250's
    Speaker Cable , Digital Coax , Interconnects
    QED Speaker Cable , Chord Coax Digital , Nakamichi Interconnect , Belkin Interconnect

  2. #2
    Join Date: Jan 2009

    Location: Essex

    Posts: 32,332
    I'm openingabottleofwine.

    Default

    You used to be able to get appropriate adapters for the two Quad 303s from flashback sales, but sadly David Laine died three years ago and the company has ceased trading. Quad 303s use a 4-pin DIN plug/socket. These are hard to come by, but are available from the likes of Farnell, Deltron and RS Components:

    https://cpc.farnell.com/c/plugs/4-pl...-pin-din-plugs

    https://www.dem-uk.com/deltron-compo...s_and_sockets/

    https://uk.rs-online.com/web/c/?sear...4-pin+DIN+plug



    You might be able to buy 4-pin DIN plugs from Amazon and/or eBay.


    Do you want to 'horizontally' bi-amp, or 'vertically' bi-amp? There is a useful article on bi-amping in The Knowledge. https://theartofsound.net/forum/show...-and-Bi-wiring
    Last edited by Barry; 19-08-2023 at 10:22. Reason: Addition and correction
    Barry

  3. #3
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 5,274
    I'm Dan.

    Default

    Hi Barry

    Thank you for the links i would like to try either way with horizontally and vertically
    [B] Pre & Power [/B\]
    Technics SU C909U with Quad 405 Power
    Turntable
    Thorens TD 125 MK1 , SME 3009 S2 Non Improved , Shure V15 II Cartridge , SME 2000 Plinth
    CD Transport & DAC & PSU
    Marantz 6005 , Beresford Caiman , Paul Hynes SR4
    Loudspeakers
    JPW Kit with Audax , Peerless and VOLT B250's
    Speaker Cable , Digital Coax , Interconnects
    QED Speaker Cable , Chord Coax Digital , Nakamichi Interconnect , Belkin Interconnect

  4. #4
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 5,274
    I'm Dan.

    Default Completed Bi Amp = Fantastic

    Finally Bi Amped the 2 303's with the 33 Pre 1 303 for treble and 1 303 for Bass

    Celestion A1 Compact Loudspeakers

    Marantz 6005 CD Transport , Project Box S DAC , Chord Coax , Paul Hynes SR4 PSU


    "Courtney Pine - Modern Day Jazz Stories - 1996 - Verve "
    [B] Pre & Power [/B\]
    Technics SU C909U with Quad 405 Power
    Turntable
    Thorens TD 125 MK1 , SME 3009 S2 Non Improved , Shure V15 II Cartridge , SME 2000 Plinth
    CD Transport & DAC & PSU
    Marantz 6005 , Beresford Caiman , Paul Hynes SR4
    Loudspeakers
    JPW Kit with Audax , Peerless and VOLT B250's
    Speaker Cable , Digital Coax , Interconnects
    QED Speaker Cable , Chord Coax Digital , Nakamichi Interconnect , Belkin Interconnect

  5. #5
    Join Date: Jan 2009

    Location: Essex

    Posts: 32,332
    I'm openingabottleofwine.

    Default

    Ah, so 'horizontal' biamping. Well done.

    (Had it been me, I would have arranged for 'vertical' biamping. But then each to their own. )
    Barry

  6. #6
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 38,136
    I'm Martin.

    Default

    vertical does make more sense. but it is more complicated.

    I'm interested to know if there was any perceived benefit over just using one 303 for the lot?

    I got two Krell KSA50S here so could bi-amp but I've been working on the principle that one is sufficient. Finding somewhere to plug the second one in is also an issue, don't like to run them off a power strip due to potential for current limiting.
    Current Lash Up:

    TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.

  7. #7
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 6,903
    I'm Lawrence.

    Default

    I thought you could just do the same thing to get vertical but have one amp per side instead of splitting them top and bottom. So just change the way the speaker cables are plugged in. What's the complication?

    There's also the added advantage of being able to place them near the speakers with short speaker cable runs if you want.

    Sent from my PCT-L29 using Tapatalk

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