OUTPUT TRANSFORMER
POWER TRANSFORMER
12AX7/ECC83
PREAMP TUBE
POWER TUBE
6V6
5
Line Out
Boost/Drive
FTSW
TIP = BOOST
RING = DRIVE
2.4 TROUBLESHOOTING
Supro products have been designed for years of trouble free service. There are many unique protection features to
the design. If you are having difficulties, check the following:
No sound, but pilot light is ON
Check to see that the speaker is plugged into the speaker jack (not the footswitch jack). Make sure all knobs are turned
up past zero and that the Standby switch is set to operate. As this is a tube amplifier, the tubes take approximately 1
minute to warm up before you will get sound. The Standby switch should be set to standby for this warm up period.
No sound and the lights are all OFF
Unplug the power cord and check the 3A,250V(100V-120V); 2A,250V(220V-240V) fuse.
If you have any further questions, our email address is
2.3 TUBES
Each Supro tube amplifier is 100% analog.
2.2 REAR PANEL
BOOST/DRIVE FTSW
Using a TRS cable, connect a two-button, latching footswitch to this jack
to facilitate remote switching of the Boost and Drive functions.
LINE OUT
The Line Out provides a buffered preamp output to another amplifier or
to a console for recording.
