Field notes, comparisons, and real bench-tested research.
Four new posts a week on dating, identifying, maintaining, and understanding vintage Fender tube amps — built on the foundation of the original 1997–2000 Gagliano research and decades of community knowledge.
Vibrolux vs Deluxe Reverb: 2×10 vs 1×12 in the 35-Watt Sweet Spot
Quick Reference: Vibrolux Reverb vs Deluxe Reverb at a Glance Deluxe Reverb circuit: AB763 (blackface), AA763 (transitional 1963) Vibrolux Reverb circuits: AA964 (1964-1965), AB568 (1966-1967) Deluxe Reverb output:…
Super Reverb vs Deluxe Reverb: When 40W of 4×10 Beats 22W of 1×12
Visual reference for super reverb vs deluxe reverb. Quick-Reference Spec Comparison Spec Fender Super Reverb Fender Deluxe Reverb Circuit Number AA763 / AB763 AA763 / AB763 Era Classification…
Hot Rod Deluxe vs Deluxe Reverb: Modern vs Vintage Tube Tone
Quick Reference: Hot Rod Deluxe vs Deluxe Reverb at a Glance Hot Rod Deluxe IV: 40W RMS, 3 channels, 2x 6L6GC, 3x 12AX7 preamp, solid-state rectifier, digital reverb,…
6V6 vs EL84: American Compression vs British Chime in Small Amps
These two tubes define the tonal divide between American and British small-amp design. The 6V6 is the heartbeat of every classic Fender circuit from the tweed Champ to…
EL84 vs 6L6: British Class-A vs American Class-AB Compared
Most players treat the EL84 vs 6L6 question as a simple “British vs American” choice. That framing isn’t wrong, but it misses the real story. The difference between…
5751 vs 12AX7: The Lower-Gain Sub That Pros Use
Most players assume swapping a 5751 for a 12AX7 cuts your amp’s gain by 30 percent, based on the raw amplification-factor ratio (70 versus 100). That estimate turns…
Princeton Reverb ’65 vs ’68 Custom Reissue: AA1164 vs Modified
This covers the AA1164 circuit in detail, explains what Fender actually changed in the ’68 Custom design, and gives you a concrete framework for matching each amp to…
Pro Reverb vs Deluxe Reverb: The Forgotten Middle Ground
Quick Reference: Pro Reverb vs Deluxe Reverb at a Glance Pro Reverb circuit: AA165 1964–66 / AB668 1966–67 (blackface), AA1069 (silverface) Deluxe Reverb circuit: AB763 (blackface), AA1172 /…
Hot Rod Deluxe vs Hot Rod DeVille: 1×12 vs 2×12 in the Same Circuit
The Fender Hot Rod Deluxe and Hot Rod DeVille share an identical three-channel preamp circuit and control layout, but diverge in power amp configuration and speaker complement: the…
Super Reverb vs Twin Reverb: 4×10 vs 2×12 in Blackface Glory
Forty watts or eighty-five. That gap sounds minor on paper. In a rehearsal room at volume, it’s the difference between an amp that starts to bark when pushed…
12AY7 vs 12AX7: The Tweed-Era Low-Gain Tube and Modern Substitutions
Most players researching a 5E3 Deluxe restoration get told “just swap in a 12AX7 if you can’t find a 12AY7.” That advice is half-right and half-wrong. The swap…
EL34 vs KT88: When the Power Tube Swap Changes Your Amp’s Character
Twenty-five watts versus forty-two watts of plate dissipation. That single number gap explains most of what separates these two tubes. But the full story runs deeper than headroom…