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Pieoftheday
19-06-2017, 19:06
I don't care if it is introducing noise into my Hifi, I've got to have the fan on today:ner:

Barry
19-06-2017, 19:09
I'm using my Quad 510 monoblocks at the moment, in place of my usual 25W Class A monoblocks. The latter each have a dissipation of 400W! It's far too hot for that.

Pieoftheday
19-06-2017, 19:51
I'm using my Quad 510 monoblocks at the moment, in place of my usual 25W Class A monoblocks. The latter each have a dissipation of 400W! It's far too hot for that.

It's too hot for pretty much anything let alone a red hot amp, good you have a fall back amp:)

Pharos
19-06-2017, 22:00
Barry 400W dissipation for an O/P of 25W is very inefficient.

The maximum theoretical efficiency of class A from memory was about 45%, but that is about 6%.

Arkless Electronics
20-06-2017, 12:07
Barry 400W dissipation for an O/P of 25W is very inefficient.

The maximum theoretical efficiency of class A from memory was about 45%, but that is about 6%.

It all depends on what type of class A and what load it is specified into.

Barry
20-06-2017, 15:56
Barry 400W dissipation for an O/P of 25W is very inefficient.

The maximum theoretical efficiency of class A from memory was about 45%, but that is about 6%.

They are a pure class A design, where the power output doubles for each halving of the load impedance.

http://www.marklev.com/2013/04/ml-2-monophonic-class-power-amplifier.html

Oddball
20-06-2017, 23:30
You cant beat a bit of fan :eyebrows:

maxrob200
21-06-2017, 00:43
The Mark Levinson ML-2 mono blocks were 25 watts Class A and they were huge! So was the Krell KSA 50. All real Class A amps are big, hot and heavy LOL

alainrj
22-06-2017, 09:36
With a bit of creative thinking No need for a fan


20569

Notice I'm earthed also