For the past 3-4 months I've been running my Quick Rod with two NOS 5751s in the preamp stage; really perfect for Gear 1, pure vintage goodness.
More recently I've begun working on an instrumental project called Codex Astartes. No matter what I tried, I could not get a good metal tone! No matter what gear, what gain setting, even with an OD pedal ... nothin' but feeback and/or microphonics.
Then it hit me ... of course not, not with dual 5751s in the preamp stage!
I just replaced V1 with a JJ 12AX7 ...
... Buttery, high gain tone of the gods is back!! :)
Gear 2, with the gain at 12 o'clock instantly conjures up vintage Dokken/RATT tones with ease, especially with the Scumback-loaded cab.
I had forgotten how jaw-dropping, how high resolution, and how TONEFUL the Splawn is when it's back into its "home turf" of melodic metal.
Simply put:
I'm re-sold on the Quick Rod's value all over again. For a mere $2k, this amp ANNHILIATES amps that cost 1.5-2x the QR.
Swapping out a single valve can take you from 1972 to 1984, and then beyond when you swap out both preamp valves, with a degree of quality that is unmatched at this price point.
Best metal amp. Ever.
Some kind of clippage coming soon!