Chickentown
Active member
THD Bivalve for sale - $875 shipped (CON-US) with a cornucopia of cool vintage and newer tubes.
I really like this amp, but it needs to go so I can hold on to my Mesa Boogie.
I'll send along an arsenal of tubes so you can start trying all the possibilities right away. The amp is serial #10 and comes with the optional gig bag. It originally came from THD is a small flaw in the "cage" that doesn't affect anything, but it keeps it from being 100% mint (see last photo).
Best to email me directly since I don't check the Boogie Board often enough to give speedy replies to all questions - [email protected]
Description from THD:
The big brother of the THD UniValve, the BiValve-30 is a Single-Ended Class-A amplifier head with dual output tubes that can be switched at will among many octal-based power tubes, including 6L6, EL-34, 6550, 6CA7. 6V6, 6K6, KT-90, KT-88, KT-77 and KT-66, for different tones without re-biasing the amp. The two output tubes do not need to be matched in any way—you are free to experiment with any combination you want! Likewise, the two preamp tubes can be any combination of 12AX7, 12AT7, 12AU7, 12AY7 or 12AZ7. The BiValve-30 delivers tones from smooth and clear to very aggressive overdrive, like the UniValve, but with more power and a much more compliant output transformer for thicker lows. It is easily capable of driving a 4x12" cabinet, yet quite small and relatively light. Finally, it has a built-in Hot Plate® Power Attenuator that allows for full output distortion at almost any volume. The unique combination of our touch-sensitive input circuit and the wonderfully active and reactive tone control section (that we slaved a year to perfect) make for a front-end that really responds to subtle and not-so-subtle changes in the signal being fed into the amplifier either by the guitar or any effect that may be between the guitar and the amplifier.
The tubes - most of the preamp tubes are vintage, but not NOS.
Mullard 12AT7
Raytheon 12AV7
RCA 12DW7
Sovtek 12AX7WA
GE 5963
Marshall ECC83
Old GE 12AT7
Sylvania 6V6-GT
Sylvania 6K6-GT
RCA 6K6
RCA 6V6
Silvertone 6K6-GT
Svetlana 6L6GC (x2)
JAN Philips 6L6 WGB
Teslovak KT88-SA (x2)
Sovtek 5881
SED "winged C" EL-34
I really like this amp, but it needs to go so I can hold on to my Mesa Boogie.
I'll send along an arsenal of tubes so you can start trying all the possibilities right away. The amp is serial #10 and comes with the optional gig bag. It originally came from THD is a small flaw in the "cage" that doesn't affect anything, but it keeps it from being 100% mint (see last photo).
Best to email me directly since I don't check the Boogie Board often enough to give speedy replies to all questions - [email protected]
Description from THD:
The big brother of the THD UniValve, the BiValve-30 is a Single-Ended Class-A amplifier head with dual output tubes that can be switched at will among many octal-based power tubes, including 6L6, EL-34, 6550, 6CA7. 6V6, 6K6, KT-90, KT-88, KT-77 and KT-66, for different tones without re-biasing the amp. The two output tubes do not need to be matched in any way—you are free to experiment with any combination you want! Likewise, the two preamp tubes can be any combination of 12AX7, 12AT7, 12AU7, 12AY7 or 12AZ7. The BiValve-30 delivers tones from smooth and clear to very aggressive overdrive, like the UniValve, but with more power and a much more compliant output transformer for thicker lows. It is easily capable of driving a 4x12" cabinet, yet quite small and relatively light. Finally, it has a built-in Hot Plate® Power Attenuator that allows for full output distortion at almost any volume. The unique combination of our touch-sensitive input circuit and the wonderfully active and reactive tone control section (that we slaved a year to perfect) make for a front-end that really responds to subtle and not-so-subtle changes in the signal being fed into the amplifier either by the guitar or any effect that may be between the guitar and the amplifier.
The tubes - most of the preamp tubes are vintage, but not NOS.
Mullard 12AT7
Raytheon 12AV7
RCA 12DW7
Sovtek 12AX7WA
GE 5963
Marshall ECC83
Old GE 12AT7
Sylvania 6V6-GT
Sylvania 6K6-GT
RCA 6K6
RCA 6V6
Silvertone 6K6-GT
Svetlana 6L6GC (x2)
JAN Philips 6L6 WGB
Teslovak KT88-SA (x2)
Sovtek 5881
SED "winged C" EL-34
