Quad 44 preamp upgrades

[DC]

Has anyone had any experience with buying upgrade kits / components / modules on line for a Quad 44 preamp? Was there a significant performance gain?

 

[DC]

 

[charles]

 

[DC]

 

[Pieter-B]

 

[DC]

 

[Winders]

 

[Jozua]

 

[mafioso]

 

[DC]