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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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
Very nice looking. Enjoy !
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
Hi
The fans are disconnected to be silent
Stéphane
..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
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
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
Attachment 52429Attachment 52430Attachment 52431
Hi,
The third copy arrived.
I have the same good sound on all speakers.
Stéphane
Attachment 52530
Superb !
[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
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
The power supply schematics MC 450-650-750
Attachment 53257Attachment 53258
Stéphane
Attachment 54069
Hi,
The family has increased over a model MC1250.:D
The model of Franck (cooky1257).:)
Big sound.:applaud:
Stéphane
Attachment 54128
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
Attachment 55270
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
News
http://1.bp.blogspot.com/-WqsrdNjI8K...0/P1050357.JPG
Stéphane
Stephane, If you could find caps with a slightly higher voltage rating they would work. Say 150vdc. And a slight increase in capacitance wont hurt either.
But a those capacitor are trash.
One MC1250 channel per 15" woofer, and 1 MC450 channel per compression! Nice!Quote:
Originally Posted by stephane RAME
What is the nominal impedance of your woofers?
YesQuote:
One MC1250 channel per 15" woofer, and 1 MC450 channel per compression! Nice!
http://www.audioheritage.org/vbullet...-Audio-SR-D402
No measureQuote:
What is the nominal impedance of your woofers?
Stéphane