IMHO it’s not an issue at all.

Many thanks to The Abyss 2022 for the tube recommendation. I planned to purchase the HA-300 next, but feel quite content with the HA-3A so far. I’ve bought some beautiful things instead. While listening to beautiful music you want see the beauty around you.

It definitely is, since whole chassis is grounded (connected to ground).

I never heard any noise from my HA-3A as well as from my other gear with exception of the speaker tube amp, but that very faint hum seems inherent to my unit. I always plugged the whole setup into one inexpensive Supra distributor.

As far as I know the best way to avoid ground loop issues is to power all of your audio chain from ONE outlet, using power distributor (filter).

If I had to connect the May with HA-300 I wouldn’t go cheap:)

Of course, but why people say the good priced valuable things “it’s steal”? Funny English:) Anyway, most of us prefer to get more paying less.

“For the first time in my life I feel like I’ve stolen enough” (Bender Rodriguez):)

Soldering is like one way ticket. Might be more future proof to purchase one (or better two sets of solder-free connectors to easily try different wires and compare them). Of course, the good ones aren’t cheap. Again, this way is better for silver or silver plated wires because copper ones are...

Could that issue be related with the caps modification?

Seems like Duelund mod became a mainstream:)

Audiophile(samurai) has no goal, only path… My path is tubes (or serpentine road from tube to tube). Moving forward slowly you can breathe in fresh air and see the endless sky above. Being translated into audio that means listening to beautiful music in its natural beauty. JSBach’s harpsichord...

There is military belief that shell(bomb) never falls twice in the same place:) Good luck!

So everything is fine, just follow LXMc’s advice.

Well, you should push really hard to flex anything made of that thick steel:)