Quad set of matched valves vs 2 pairs of matched valves.

[J M Fahey]

Of course.
But IF they are not closely matched (you have what you have) best is to match current through both OT halves "by hand" , placing them as needed so total difference is, say, less than 20mA , and better if possible.

Not because of the tubes but to keep OT from losing inductance and deep Bass.

What´s the point of having the better more expensive OT and then degrade its quality by lazyness?

EDIT: I bet that 6V6 pair roughly matches EL34 current at same bias voltage .

[Justin Thomas]

But I play Fenders. I <WANT> to lose deep bass! I declare myself open for business as the only vendor of grossly mismatched tubes, to once and for all cure the Fender Fart, without ever picking up a soldering iron!
I smell a scam-biz opportunity...

I won't reveal that my parts cost is ZERO, because I will simply use discarded tubes that I get for free, that Mesa players mail to me. I will check them for shorts on my Eico 666 tube tester, and simply plug them in your amp and not adjust anything!

"The Groove not curing the flatulence in your Twin Reverb? Not meeting their promise of the best sound possible? Call me, "Groove-Kill Tubes!"

Justin

[Dave H]

I bet that 6V6 pair roughly matches EL34 current at same bias voltage .

Yes they did. That's why I tried it.

[g1]

IF they are not closely matched (you have what you have) best is to match current through both OT halves "by hand" , placing them as needed so total difference is, say, less than 20mA , and better if possible.

Not because of the tubes but to keep OT from losing inductance and deep Bass.

What´s the point of having the better more expensive OT and then degrade its quality by lazyness?

Also the matching will help reduce hum, exactly why the Fender "output tubes matching" pot was adjusted by ear for minimum hum.