Fender Rivera Era Twin Reverb II ~ Secondhand

Fender Rivera Era Twin Reverb II in very good overall condition, was serviced and recapped a few years ago.

With footswitch and cover, the speakers have been replaced with Celestion S12-150's and side handles have been fitted.

Sounds absolutley amazing.

It is very loud and very heavy and  if you connect the send and receive sockets of the effects loop you can use the loop's level controls as an extra gain stage to make it even louder!

The Fender Twin Reverb II, designed by Paul Rivera during his early-1980s tenure at Fender (1983–1986), is famously nicknamed the "poor man's Dumble" by vintage gear enthusiasts.While it features classic 105-watt all-tube Fender cleans on Channel 1, its unique lead channel circuit contains architectural similarities to Howard Dumble's legendary overdrive designs. It was the last series of production Fender amplifiers to be entirely point-to-point handwired on eyelet boards, making it a highly sought-after platform for boutique modifications.   The link between the Rivera-era Twin Reverb II and Dumble circuits comes down to how the overdrive channel handles gain and filtering:

• Pre-amp Local Negative Feedback: The Twin Reverb II lead channel incorporates a specific 500 pF plate-to-cathode local negative feedback loop in the V2A tube stage. This technique mimics early Dumble Overdrive Special designs, compressing highs and smoothing out the distortion profile. [1]
• Bass/Fartiness Mitigation: Traditional Fenders get muddy or "farty" when overdriven due to high low-end blocking distortion. The Twin Reverb II uses a massive 0.0047 uF coupling capacitor right after the first overdrive stage to filter the low frequencies entering the gain stages—a design principle closely mirrored in Dumble's cascading gain structures. [1]
• Pro Validation: The amplifier's capability was notable enough that guitar icon Larry Carlton famously used a Twin Reverb II in the early 1980s. His tech reported that it easily went toe-to-toe with Carlton’s actual Dumble amplifier for lead line