Features built into your Twin-Amp: - Two pre-amp channels: •Independent V O L U M E, TREBLE, MIDDLE, a n d B A S S f o r each channel, •Channel 1 BRIGHT switch for crisp tone emphasis, •Channel 2 GAIN control for warm Pro-Tube distortion. - Tools for tone: •Sweet sounding Fender spring REVERB, •Ultra-high frequency definition from the P R E S E N C E control, •TREMOLO volume modulation with SPEED and INTENSITY controls. - Effects loop options: •Engage/bypass external effects devices with the L O O P button, •Normalize (or set alternate) engage/bypass volume levels using the SEND and RETURN controls. - Remote functions of the Four–button F o o t s w i t c h : •CHANNEL select, •EFFECTS LOOP bypass/ engage, •REVERB on/off, •TREMOLO on/off. - Expansion Options: •Output to a second Pro-Tube amp using the PRE-AMP OUT and POWER-AMP IN jacks, and c o n t rol both amps as one, •Output to sound re i n f o rcement equipment, •Plug two 8 ohm speaker cabinets into each of your Pro-Tube amp(s) at the MAIN SPEAKER and EXTERNAL SPEAKER jacks. - Selectable output levels: •FULL POWER supplies 100 watts of output, •1/4 OUTPUT POWER supplies 25 watts of output for smaller venues, •1/4 OUTPUT POWER allows the drive tone created by high GAIN/ VOLUME settings to be generated at lower volume levels. - Quality built: •The chassis is constructed from the finest, most roadworthy components, •Cabinets are made from s t u rdy 3/4 inch birch/maple plywood, •C o v e red in genuine Tolex for long lasting good looks. - Extras: •Tilt-back legs provide an alternate listening angle, •Removable casters—ON for easy transportation and OFF for secure cabinet placement. - This manual includes procedures for testing, balancing and replacing the amplifier tubes at the core of your Pro–Tube sound.