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Quad 405 Updated .... Any Knowlege on this upgrade

I am trying to deciding if I should just buy a newer (used) ss amp or up grade my old quad 405.

Has anyone listened to a Quad 405 after updating?

According to the Quad builder .... I quote .....
I highly disagree with so many of these so called "Audiophiles" speak without ever having dealt with products. I own extremely high end audio equipment and a modified 405 is one of the best. As a matter of fact dual mono Quad 405's are the best I have ever heard."

So I am looking for some truth ..

BTW
I am currently using
Audio Research SP5 pre amp
Quad 405 dumping main amp
Pioneer Elite DV-48AV
Polk Monitor 10's
Velodyne VRP 1200 sub

Thanks in advance
Tony in Florida
ajanzalone
vinw
67 posts
 
I had them in the 80's, it had a hard time driving the Infinity RSIII floorstanders. What would the update/upgrade be?
mgattmch
571 posts
 
If the upgrade is from MK1 to MK11 status, yes, the upgrade is significant. I had an early MK1 unit driving a pair of Yamaha NS-1000M speakers (a know difficult load) and the amp would definitely clip at high levels. No problem at all when I upgraded to a MK11 unit.
ajanzalone OP
2 posts
 
The DATA Opamp & new board upgrade can be viewed at http://www.quadmodsusa.com/

But the question remains as to how this really sounds ..
and if anyone has experienced this change?

looking for some truth .. beyond the advertised hype
amplifier_surgery
3 posts
 
We restore QUAD Amplifier as a hobby. In our experience, the QUAD 405 works best with high sensitivity speakers e.g. 90db/m or better. Their output is very tube-like and do not cause listening-fatigue as other semiconductor Amps do. A power supply and audio boards restoration does wonders to the sound.
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