Amplifier Type: Variable Class A / Class AB Tube Guitar Combo
Controls: Volume, Boost, Treble, Mid, Bass, Reverb Level, Reverb Dwell, Master, Boost Toggle Switch, Loop Toggle Switch, Reverb Toggle Switch, Class A/Standby/Class AB Power Toggle Switch
Bypass Layout: Tube-Buffered Effects Loop with Dedicated Top-Panel Toggle Switch
Power Requirements: Standard IEC AC Cable (110V-240V regional configuration)
Current Draw: Mains Powered (No mA pedal power threshold applies)
Dimensions: 19.0 x 20.0 x 9.5 inches / 482 x 508 x 241 mm
The internal engineering of this high-headroom combo amplifier breaks conventional design rules by offering two completely distinct power amplifier personalities in a single chassis. The foundation of the power amplifier relies on a matched pair of robust 5881 beam-power pentode tubes, which interact with a comprehensive five-tube preamplifier arrangement consisting of three 12AX7, one 12AT7, and one 12DW7 vacuum tubes. By manipulating the 3-way center standby switch, you can completely reconfigure the operating class of the 5881 power path on the fly. Flipping the switch to the Class A setting delivers a 35-watt cathode-biased operation, mimicking traditional mid-century midrange compression and organic texture. Switching to the Class AB setting reconfigures the amplifier into a 50-watt grid-biased framework, optimizing power delivery for fast transient tracking and high headroom.
The performance-focused control layout isolates interactive tone-shaping modules to minimize layout clutter while providing expansive studio flexibility. A specialized 3-band equalizer network shapes the fundamental tone, maintaining a punchy, tactile low-end response even when processing high-output pickups. Adjacent to the equalization section sits a multi-stage, tube-driven spring reverb pan managed by dual Level and Dwell parameters, allowing fine control over the depth and overall decay length of the spatial reflections. Physical, robust mini-toggle switches are assigned directly to the onboard Boost circuit, the tube-buffered effects loop, and the spring reverb pan, providing instant control-panel overrides. These parameters can also be controlled remotely via independent single footswitch jacks on the rear panel.
In a modern performance framework where complex stereo modulation, multi-stage fuzz boxes, and vintage overdrives form the core signal footprint, this amplifier operates as an open canvas. Connect your instrument through your pedalboard and select the 50-watt Class AB grid-biased mode on the power toggle switch. Set the Bass control to 11:00, Midrange to 1:00, and Treble to 12:00, while advancing the Master volume to 2:00. This setup maximizes the high-voltage headroom of the 5881 power tubes, producing a fast transient response that prevents heavy distortion or clipping from collapsing the lower frequencies. The custom 12-inch Eminence ceramic BD12 driver cleanly projects the nuanced clipping of upstream boutique pedals across large stages.
For soulful blues leads, expressive jazz accompaniment, or tracking sessions that require immediate touch-responsive power amp breakup at lower volumes, alter the internal topology to its cathode-biased state. Shift the main standby toggle to the 35-watt Class A setting, advance the preamplifier Volume knob to 2:00, and back the Master volume down to match your studio room tracking requirements. Engage the onboard Boost switch to add a focused mid-frequency push. This configuration alters the internal tube biasing to deliver a bold, spongy midrange focus that responds natively to subtle variations in pick attack and guitar volume pot adjustments, smoothly transitioning from a woody clean to classic analog saturation.
IMPORTANT ELECTRICAL AND MAINTENANCE SAFETY PROTOCOLS: HIGH VOLTAGE ENERGY RESIDUE ENCLOSED WITHIN CHASSIS PATHWAYS. PERMANENTLY DISCONNECT THE MAIN IEC AC VOLTAGE TERMINAL CABLE BEFORE COMMENCING COMPONENT INSPECTIONS OR TUBE REPLACEMENTS. THE POWER TOGGLE PATH MUST REMAIN ACTIVE WITH THE MAIN STANDBY SWITCH CENTERED FOR A MINIMUM OF SIXTY SECONDS TO ALLOW SAFE PREHEATING OF THE 12AX7, 12AT7, 12DW7, AND 5881 VACUUM GLASS PATHS BEFORE ENGAGING OPERATIONAL VOLTAGES. NEVER ENERGIZE THE POWER STAGES WITHOUT A STABLE IMPEDANCE MATCHED LOUDSPEAKER CABINET ATTACHED TO THE CORRESPONDING REAR TERMINAL PORTS (16-OHM, 8-OHM, OR 4-OHM LOADS). FAILING TO PROPERLY ENGAGE SPEAKER LOADS WILL INDUCE TRANSITIONAL ARCHING AND CATASTROPHIC OUTPUT TRANSFORMER DESTRUCTION, IMMEDIATELY VOIDING RETAIL WARRANTY CONDITIONS. WARNING: THIS APPARATUS CONTAINS COMPONENT MATERIALS INCLUDING LEAD, RECOGNIZED BY THE STATE OF CALIFORNIA TO PROVOKE CANCER, CONGENITAL MALFORMATIONS, OR OTHER REPRODUCTIVE DAMAGES. KEEP ENCLOSURE SLOTS UNIMPEDED TO ASSURE CONSTANT CONVECTIVE THERMAL VENTILATION.
Amplifier Type: Variable Class A / Class AB Tube Guitar Combo
Controls: Volume, Boost, Treble, Mid, Bass, Reverb Level, Reverb Dwell, Master, Boost Toggle Switch, Loop Toggle Switch, Reverb Toggle Switch, Class A/Standby/Class AB Power Toggle Switch
Bypass Layout: Tube-Buffered Effects Loop with Dedicated Top-Panel Toggle Switch
Power Requirements: Standard IEC AC Cable (110V-240V regional configuration)
Current Draw: Mains Powered (No mA pedal power threshold applies)
Dimensions: 19.0 x 20.0 x 9.5 inches / 482 x 508 x 241 mm
The internal engineering of this high-headroom combo amplifier breaks conventional design rules by offering two completely distinct power amplifier personalities in a single chassis. The foundation of the power amplifier relies on a matched pair of robust 5881 beam-power pentode tubes, which interact with a comprehensive five-tube preamplifier arrangement consisting of three 12AX7, one 12AT7, and one 12DW7 vacuum tubes. By manipulating the 3-way center standby switch, you can completely reconfigure the operating class of the 5881 power path on the fly. Flipping the switch to the Class A setting delivers a 35-watt cathode-biased operation, mimicking traditional mid-century midrange compression and organic texture. Switching to the Class AB setting reconfigures the amplifier into a 50-watt grid-biased framework, optimizing power delivery for fast transient tracking and high headroom.
The performance-focused control layout isolates interactive tone-shaping modules to minimize layout clutter while providing expansive studio flexibility. A specialized 3-band equalizer network shapes the fundamental tone, maintaining a punchy, tactile low-end response even when processing high-output pickups. Adjacent to the equalization section sits a multi-stage, tube-driven spring reverb pan managed by dual Level and Dwell parameters, allowing fine control over the depth and overall decay length of the spatial reflections. Physical, robust mini-toggle switches are assigned directly to the onboard Boost circuit, the tube-buffered effects loop, and the spring reverb pan, providing instant control-panel overrides. These parameters can also be controlled remotely via independent single footswitch jacks on the rear panel.
In a modern performance framework where complex stereo modulation, multi-stage fuzz boxes, and vintage overdrives form the core signal footprint, this amplifier operates as an open canvas. Connect your instrument through your pedalboard and select the 50-watt Class AB grid-biased mode on the power toggle switch. Set the Bass control to 11:00, Midrange to 1:00, and Treble to 12:00, while advancing the Master volume to 2:00. This setup maximizes the high-voltage headroom of the 5881 power tubes, producing a fast transient response that prevents heavy distortion or clipping from collapsing the lower frequencies. The custom 12-inch Eminence ceramic BD12 driver cleanly projects the nuanced clipping of upstream boutique pedals across large stages.
For soulful blues leads, expressive jazz accompaniment, or tracking sessions that require immediate touch-responsive power amp breakup at lower volumes, alter the internal topology to its cathode-biased state. Shift the main standby toggle to the 35-watt Class A setting, advance the preamplifier Volume knob to 2:00, and back the Master volume down to match your studio room tracking requirements. Engage the onboard Boost switch to add a focused mid-frequency push. This configuration alters the internal tube biasing to deliver a bold, spongy midrange focus that responds natively to subtle variations in pick attack and guitar volume pot adjustments, smoothly transitioning from a woody clean to classic analog saturation.
IMPORTANT ELECTRICAL AND MAINTENANCE SAFETY PROTOCOLS: HIGH VOLTAGE ENERGY RESIDUE ENCLOSED WITHIN CHASSIS PATHWAYS. PERMANENTLY DISCONNECT THE MAIN IEC AC VOLTAGE TERMINAL CABLE BEFORE COMMENCING COMPONENT INSPECTIONS OR TUBE REPLACEMENTS. THE POWER TOGGLE PATH MUST REMAIN ACTIVE WITH THE MAIN STANDBY SWITCH CENTERED FOR A MINIMUM OF SIXTY SECONDS TO ALLOW SAFE PREHEATING OF THE 12AX7, 12AT7, 12DW7, AND 5881 VACUUM GLASS PATHS BEFORE ENGAGING OPERATIONAL VOLTAGES. NEVER ENERGIZE THE POWER STAGES WITHOUT A STABLE IMPEDANCE MATCHED LOUDSPEAKER CABINET ATTACHED TO THE CORRESPONDING REAR TERMINAL PORTS (16-OHM, 8-OHM, OR 4-OHM LOADS). FAILING TO PROPERLY ENGAGE SPEAKER LOADS WILL INDUCE TRANSITIONAL ARCHING AND CATASTROPHIC OUTPUT TRANSFORMER DESTRUCTION, IMMEDIATELY VOIDING RETAIL WARRANTY CONDITIONS. WARNING: THIS APPARATUS CONTAINS COMPONENT MATERIALS INCLUDING LEAD, RECOGNIZED BY THE STATE OF CALIFORNIA TO PROVOKE CANCER, CONGENITAL MALFORMATIONS, OR OTHER REPRODUCTIVE DAMAGES. KEEP ENCLOSURE SLOTS UNIMPEDED TO ASSURE CONSTANT CONVECTIVE THERMAL VENTILATION.
