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I like my Mark IV with 6V6s. I also have a Mark III which I actually like better than the IV with 6L6s and EL-34s so I thought I'd try 6V6s in the mark IV for a different flavor. It's not a bedroom amp in this configuration, it's still plenty loud to gig with. It doesn't have the headroom of the...

We all know that Mark IVs allow for this switch (only in Tweed or SimulClass mode - also, the 4 ohm speaker tap sounds better with this configuration) but can a SimulClass MarK III also take this tube swap? I'm tempted to try it and like what it does for my Mark IV but I'm curious what it would...

Interesting - uhh.. well the popping fart (or farting pop if you prefer) does not happen when powering up, only powering down. It is annoying but if no harm is being done just I just grin and bear it? I've taken it apart and visually inspected and cleaned sockets, etc and it still makes the loud...

First time poster and new member here, so I apologize for asking what may be a previously addressed issue, but my Mark IV makes a very loud popping noise (loudness is dependant on how loud the amp is set as well) when powering down. It seems perfectly normal in all other respects and I've been...