View Full Version : Dynaudio acoustics dca 450 (mc2 audio mc 450)
stephane RAME
12-09-2010, 05:05 AM
Hi,
My new amplifier for my system
http://www.audioheritage.org/vbulletin/showthread.php?29600-Altec-AcoustaBass-AB-2200-JBL-3732mhf-JBL-2402h
2 amplifier Dynaudio Acoustics DCA 450 - 2x250w-8ohms
http://www.mc2-audio.co.uk/mc450/
Good sound :):):)
Stéphane
caladois
12-09-2010, 08:08 AM
Very nice looking. Enjoy !
cooky1257
12-10-2010, 02:26 AM
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
12-10-2010, 04:55 AM
Hi
The fans are disconnected to be silent
Stéphane
cooky1257
12-10-2010, 08:12 AM
..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/showthread.php?t=18411&highlight=MC1250
stephane RAME
12-13-2010, 04:44 AM
Hi,
Thank you for reading.
The seller was already using with the fans unplugged.
Stéphane
http://www.audioheritage.org/vbulletin/showthread.php?11750-My-new-Loudspeaker-Systems-%E2%80%93-Great-Plains-audio
http://www.audioheritage.org/vbulletin/showthread.php?29600-Altec-AcoustaBass-AB-2200-JBL-3732mhf-JBL-2402h
stephane RAME
08-12-2011, 12:42 AM
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
524295243052431
stephane RAME
08-18-2011, 09:08 AM
Hi,
The third copy arrived.
I have the same good sound on all speakers.
Stéphane
52530
caladois
08-18-2011, 10:58 AM
Superb !
karawaci
09-23-2011, 07:18 AM
[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
09-23-2011, 09:19 AM
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/2011/08/dynaudio-acoustics-dca-450-mc2-audio-mc_26.html
Stéphane
stephane RAME
10-14-2011, 10:29 AM
The power supply schematics MC 450-650-750
5325753258
Stéphane
stephane RAME
12-15-2011, 11:45 AM
54069
Hi,
The family has increased over a model MC1250.:D
The model of Franck (cooky1257).:)
Big sound.:applaud:
Stéphane
stephane RAME
12-18-2011, 11:29 PM
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
stephane RAME
03-31-2012, 11:33 AM
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
stephane RAME
02-21-2014, 09:18 AM
News
http://1.bp.blogspot.com/-WqsrdNjI8Ko/UwdwrHoK2SI/AAAAAAAADJA/_vFXV7mUp_k/s1600/P1050357.JPG
Stéphane
NickH
02-21-2014, 09:50 AM
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.
News
http://1.bp.blogspot.com/-WqsrdNjI8Ko/UwdwrHoK2SI/AAAAAAAADJA/_vFXV7mUp_k/s1600/P1050357.JPG
Stéphane
One MC1250 channel per 15" woofer, and 1 MC450 channel per compression! Nice!
What is the nominal impedance of your woofers?
stephane RAME
02-21-2014, 10:33 AM
One MC1250 channel per 15" woofer, and 1 MC450 channel per compression! Nice!
Yes
http://www.audioheritage.org/vbulletin/showthread.php?35331-News-speakers-FD-Audio-SR-D402
What is the nominal impedance of your woofers?
No measure
Stéphane
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