R Series V1.0 p 30
Suprema, Chubster 55, R55-112
High-gain input impedance: 1 Megohm
Low-gain input impedance: 33k ohms
Output impedance: 8 ohms
Line output impedance: 330 ohms minimum
Total harmonic distortion: 5% at rated power
Bandwidth: 50 Hz to 20kHz
Preamp tubes: Five 12AX7A
Output tubes: Two EL-34
Tube voltage: 430 volts DC
Output power: 55 watts RMS into 8 ohms
Operating voltage: 115 volts AC or 230 volts AC (export model), or 100 volts AC
(Japan only)
Speaker: One 12" specially designed Celestion G12T-75 or G12T-85 (Suprema is
Vintage 30 or optional G12-T75)
Speaker impedance: 8 ohms
Speaker power handling: 75 watts (Suprema is 70 Watts)
Reverb type: Accutronics 3-spring
Footswitch functions: Channel switching, boost for Channel 1, Ninja Boost
Height: 18" (Suprema is 21 ½” Tall not including ¾” for the rubber feet)
Width: 20-7/8" (Suprema is 24 ½” wide)
Depth: 9-3/4" (Chubster 55 is 12” Depth)
Weight: 47 lbs (R55) 52 Pounds (Chubster 55), and 67 Pounds (Suprema).
Cabinet material: Solid lumber-core plywood
Cabinet thickness: 3/4"
Baffleboard: 3/4" or 5/8”-thick Plywood
Construction: Dadoed joints
Covering: Vinyl
Cleaning of vinyl covering: Moist cloth, dishwashing liquid
Grillecloth: Synthetic, fire-retardant cloth
Care of grillecloth: Remove frame, use compressed air to blow out dust
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