I wanted to ask you what are the Options to Upgrade an Art Tube MP?
I recently changed the Tube to a ECC81, this made a nice difference. Are there any other recommended upgrades?
The funny thing is that this isn't a tube preamp at all...
Most amplification is done by the transistorized input amplifier.
They probably added a tube to add some 'tube distortion'.
I don't have the impression that the suggested modifications will result in a significant change of sound.
The modifications are typically what the 'phreakz' suggest...
I think the best modification is to bypass the tube!