In most cases, it's probably not a good idea. I definitely wouldn't touch it if it were still under warranty. I got a pair of 60's vintage ALTEC 1570B mono blocks and had them modded using Tom Tutay's mods. These mods made a considerable difference and turned old commercial amps into something special in my two-channel system.
Is It Worh Modding An Amp
I have a Primaluna Dialogue One that sits idle as a backup. I’m debating the idea of having it modded. Problem is I have no idea what can or should be upgraded or if the amp is worth the investment. Id be willing to fork over 500-1000 if it was worth it and made sense compared to what else I could do with the funds. Curious what people’s experiences and thoughts are?