Dynaudio acoustics dca 450 (mc2 audio mc 450)

[stephane RAME]

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

[caladois]

Very nice looking. Enjoy !

[cooky1257]

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

[stephane RAME]

Hi
The fans are disconnected to be silent
Stéphane

[cooky1257]

..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

[stephane RAME]

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

[stephane RAME]

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

[stephane RAME]

Hi,
The third copy arrived.
I have the same good sound on all speakers.

Stéphane

[caladois]

Superb !

[karawaci]

[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

[stephane RAME]

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

[stephane RAME]

The power supply schematics MC 450-650-750



Stéphane

[stephane RAME]

Hi,
The family has increased over a model MC1250.
The model of Franck (cooky1257).
Big sound.

Stéphane

[stephane RAME]

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

[stephane RAME]

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