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Thread: Croft 7r used as 7r monoblocks

  1. #1
    Join Date: Jul 2020

    Location: Athens, greece

    Posts: 7
    I'm George.

    Default Croft 7r used as 7r monoblocks

    Hi guys,
    Quick question,
    Could two amps croft series 7r be used as 7r monoblocks?
    If yes, how is it done?
    Thank you in advance.
    George

  2. #2
    Join Date: Jan 2008

    Location: Norfolk, UK

    Posts: 4,385
    I'm Rob.

    Default

    Hi George.

    Iím assuming the two amps you have are both the 7R integrated amplifiers?

    If so, then yes. Connect one to the left speaker only and connect the left output of your source to the corresponding input on the amp.

    Repeat the same for the other amp but right side only.

    On both select the input and then adjust the volume dials to match when listening - or leave them set at an appreciable level if your source component/s has/have variable output.

    Iím not quite sure if thereíll be a massive advantage (or any at all) but it will work. Essentially itíll give one amp per channel, but do check that the amplifier will be happy with the single channel load (as theyíre not bridgeable) - the manual should give you that warning if not.

  3. #3
    Join Date: Jul 2020

    Location: Athens, greece

    Posts: 7
    I'm George.

    Default

    Thank you for your reply!
    Actually they are not integrated. They ll be connected to a croft 25r pre.
    They don't have anything on the front panel but the on-off switch...
    And I don't think there will be a manual since they will be bought 2nd hand.
    I don't know if they are bridgeable...

  4. #4
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 28,389
    I'm Martin.

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    You don't get a manual with Croft even when they are new.

    You might get more benefit by vertically bi-amping with them rather than just use one channel of each amp.
    Current Lash Up:

    *Oppo BDT-101CI* Nelson Pass DCB1 / Krell KSA100 mkII * JM Lab Electra 926 *


    'You fool! To think that your ape-brain could contain the full knowledge of the Krell!'

  5. #5
    Join Date: Jan 2008

    Location: Norfolk, UK

    Posts: 4,385
    I'm Rob.

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    Quote Originally Posted by GKOU View Post
    Thank you for your reply!
    Actually they are not integrated. They ll be connected to a croft 25r pre.
    They don't have anything on the front panel but the on-off switch...
    And I don't think there will be a manual since they will be bought 2nd hand.
    I don't know if they are bridgeable...
    It sounds like they are power amps. Do you have a picture of the rear panels?

  6. #6
    Join Date: Jan 2008

    Location: Norfolk, UK

    Posts: 4,385
    I'm Rob.

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    Also, are your speakers biwireable?

  7. #7
    Join Date: Jul 2020

    Location: Athens, greece

    Posts: 7
    I'm George.

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    Quote Originally Posted by Filterlab View Post
    Also, are your speakers biwireable?
    Actually they are.

  8. #8
    Join Date: Jan 2008

    Location: Norfolk, UK

    Posts: 4,385
    I'm Rob.

    Default

    Excellent.

    So attach one of the amps (assuming power amps here) to one speaker; biwired from the speaker outputs.

    Attach the other amp to the other speaker in the same way (utilising both channels, one to treble and one to bass).

    If the pre amp doesnít have dual power amp outputs, grab yourself some unbalanced Y splitters (one per channel). These will enable you to use run the single interconnect output from the pre amp into the dual input on the power amp.

    Two of these should do you nicely...



    https://www.audiovisualonline.co.uk/...saAr3lEALw_wcB

  9. #9
    Join Date: Jan 2008

    Location: Norfolk, UK

    Posts: 4,385
    I'm Rob.

    Default

    Drawn you a diagram, hopefully it should help.


  10. #10
    Join Date: Jul 2020

    Location: Athens, greece

    Posts: 7
    I'm George.

    Default

    thank you!!
    will give it a try.

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