The amp gained thickness

One day at rehearsal, after warming up the amp, turning off the standby switch, I had no volume, and started trouble shooting cords, effects pedals, and finally straight into the amp

For $35, I felt like I bought a new amp

And the amp just seemed to lack any real balls or bottom end.

Immediately upon firing the amp up with the new tubes installed, I was rewarded with the sonic reminder of just how fantastic this amp sounds

The amp has so much power i had forgotten how powerful the amp is.

These tubes made a huge difference, and until replacing the tubes, I thought I had a pretty good amp

I have an awesome amp, that lives up to the nick name of "The poor man's Hot Rod Deluxe"!

a $45.00 Class D Linear Amp and Car stereo your guitar through a mixing board because this technology of 0-bias tubes sucks the big one.

I bought a tube set up for my fender deluxe, pre's and powers, for i think like $67 total, and I watched a bunch of you tube videos, bought a millimeter and biased the amp myself

Amp sounds like new

The sound is pure crap--theoretically this places the amp into Class D operation, loads down the output transformer with hysteresis coil saturation and kills any Fourier Scale harmonics to the point of sounding Class A at a operation curve/quiescent current ratio in which you can kiss your odd order harmonics goodbye and when pushed hard even the 7581 A tubes which can handle upwards of 550vDC on the plates, break up early and sound like a Fuzz Pedal due to output transformer coil saturation.