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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
mgattmch
558 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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