Parasound HCA 2200 Mk II strange behaviour

EspenE · 03:41 PM

I have a Parasound HCA2200 Mk II amplifier (2x385W @ 4 ohm).

Very nice amp that works as it should – apart from one (a bit annoying) problem when switching it on. The left channel gives no sound before I turn the volume up quite high. Then – when the channel has been “pushed into working” by this burst of signal, it works correctly, and I can adjust the volume up and down just as I want.

The other channel works normally.

As far as I can see, this has nothing to do with the startup delay circuits (softstart and mute), which seem to work correctly in both channels: the relays for both channels clicking in in the same sequence and within the same time.

Any clues of what can be the cause for this? All help appreciated.
Regards, Espen

john curl · 24th April 2011, 03:53 PM

I would call Tony@Parasound.com and get his opinion.

EspenE · 25th April 2011, 07:22 AM

Wow, thanks.
I'll try that.

Regards,
Espen

Clicquot · 19th May 2011, 11:41 AM

Quote:

Originally Posted by EspenE

Wow, thanks.
I'll try that.

Regards,
Espen

Hi Espen,

did you get any feedback yet about this issue? I'm having kind of the same issue with my para
thx!

inspired · 14th November 2011, 02:10 PM

I'm looking for one of these amps and am also interested in the outcome as I may have to deal with the same issue when I buy one.

PeteNFB · 25th February 2012, 11:44 PM

This is causes by dirty contacts of the output relay.

24th April 2011, 03:32 PM	#1
EspenE diyAudio Member Join Date: Jun 2003 Location: Oslo	Parasound HCA 2200 Mk II strange behaviour I have a Parasound HCA2200 Mk II amplifier (2x385W @ 4 ohm). Very nice amp that works as it should – apart from one (a bit annoying) problem when switching it on. The left channel gives no sound before I turn the volume up quite high. Then – when the channel has been “pushed into working” by this burst of signal, it works correctly, and I can adjust the volume up and down just as I want. The other channel works normally. As far as I can see, this has nothing to do with the startup delay circuits (softstart and mute), which seem to work correctly in both channels: the relays for both channels clicking in in the same sequence and within the same time. Any clues of what can be the cause for this? All help appreciated. Regards, Espen Last edited by EspenE; 24th April 2011 at 03:41 PM.

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24th April 2011, 03:53 PM	#2
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	I would call Tony@Parasound.com and get his opinion.

25th April 2011, 07:22 AM	#3
EspenE diyAudio Member Join Date: Jun 2003 Location: Oslo	Wow, thanks. I'll try that. Regards, Espen

14th November 2011, 02:10 PM	#5
inspired diyAudio Member Join Date: Jan 2009	I'm looking for one of these amps and am also interested in the outcome as I may have to deal with the same issue when I buy one.

25th February 2012, 11:44 PM	#6
PeteNFB diyAudio Member Join Date: Dec 2010	This is causes by dirty contacts of the output relay.

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