Parasound a21 upgrades


Bought a lightly used 2 year old Parasound A21 some days ago. It has exceeded my expectations for sure. Right up my alley warm mids and non aggressive highs but also dynamic and tight with lots of headroom. 
Are there any mods that are reasonable to do to these amps? Fuses etc. Can the bias be safely increased to add more class a watts? 
Also have there been any changes over the years? So is a 2 year old A21 the same as a 15 year old one? 

Thanks
mofojo

Showing 1 response by geof3

For a single box a JC5 for sure. Mono’s JC1s. I agree with Eric, PC’s are a great add Parasound gear seems to like Shunyata power. Not much else really. You are getting into the price realm when there are so many great options, it’s really tough to nail them down. The A21 is an excellent amp.