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Thread: Dynaudio acoustics dca 450 (mc2 audio mc 450)

  1. #1
    Senior Member stephane RAME's Avatar
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    Dynaudio acoustics dca 450 (mc2 audio mc 450)

    Hi,
    My new amplifier for my system
    http://www.audioheritage.org/vbullet...2mhf-JBL-2402h

    2 amplifier Dynaudio Acoustics DCA 450 - 2x250w-8ohms
    http://www.mc2-audio.co.uk/mc450/

    Good sound

    Stéphane
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  2. #2
    Senior Member caladois's Avatar
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    Very nice looking. Enjoy !
    Regards Stephane

  3. #3
    Senior Member cooky1257's Avatar
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    Nice find. If you are lucky and the fans are quiet you'll enjoy these amps very much.
    They sound excellent(I use the MC1250 and an MC650) and are very well built/over specified.
    Cooky

  4. #4
    Senior Member stephane RAME's Avatar
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    Hi
    The fans are disconnected to be silent
    Stéphane

  5. #5
    Senior Member cooky1257's Avatar
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    ..then you may want to read this thread on a uk hifi forum about possible consequences( from post 45 onwards I think);http://www.zerogain.com/forum/showth...ghlight=MC1250

  6. #6
    Senior Member stephane RAME's Avatar
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    Hi,
    Thank you for reading.
    The seller was already using with the fans unplugged.
    Stéphane

    http://www.audioheritage.org/vbullet...t-Plains-audio
    http://www.audioheritage.org/vbullet...2mhf-JBL-2402h

  7. #7
    Senior Member stephane RAME's Avatar
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    Hi,
    I just changed the fan on my amplifiers.
    The model chosen is the Noctua NF-R8 rotating at 800 revolutions / minute
    The result is very quiet

    Stéphane

    Name:  Dca 450 fan 02.JPG
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  8. #8
    Senior Member stephane RAME's Avatar
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    Hi,
    The third copy arrived.
    I have the same good sound on all speakers.

    Stéphane

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  9. #9
    Senior Member caladois's Avatar
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    Superb !
    Regards Stephane

  10. #10
    Junior Member karawaci's Avatar
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    Schematic

    [QUOTE=stephane RAME;318424]Hi,
    I just changed the fan on my amplifiers.
    The model chosen is the Noctua NF-R8 rotating at 800 revolutions / minute
    The result is very quiet

    Stéphane

    Hello,

    Best upgrading !

    But...
    Have you the electronic schematic about this amplifier DCA 450 ?

    Many thanks

    Pierre

  11. #11
    Senior Member stephane RAME's Avatar
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    Hi,
    Yes, really less noise.
    No, I do not have the electronic schematic of this amplifier.
    This summer I also change all the capacitors.
    http://srsystemaudio.blogspot.com/20...dio-mc_26.html

    Stéphane

  12. #12
    Senior Member stephane RAME's Avatar
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    The power supply schematics MC 450-650-750

    Name:  MC2 Power supply MC450-650-750 Small.jpg
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    Stéphane

  13. #13
    Senior Member stephane RAME's Avatar
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    Hi,
    The family has increased over a model MC1250.
    The model of Franck (cooky1257).
    Big sound.

    Stéphane

  14. #14
    Senior Member stephane RAME's Avatar
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    For more space, I just installed all the amplifiers in the attic above my listening room.
    More fan noise.
    The active filter EV DX46 was placed with the amplifiers, I command by the network.

    Stéphane

  15. #15
    Senior Member stephane RAME's Avatar
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    Hi,
    A hum appeared on the left channel of the MC1250, after some tests to verify that this does not come from a ground loop, I decided to changed.
    This amplifier is built in 1998 in the design life of capacitors.
    After opening the cover, a problem arises capacitors (15000uF/120v) used are not easily discoverable standards and unable to change size.
    Good news, these models are sold by MC2 for repairing.

    Stéphane

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