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: While the Celestion Greenbacks are aged at the factory, they will continue to mellow and improve in tone after several hours of high-volume play.

: To maintain peak performance, the EL84 power valves should be replaced if you notice a loss in volume or high-end clarity. Since it is a cathode-biased amp, it generally does not require a manual bias adjustment when replacing power tubes with a matched pair. : While the Celestion Greenbacks are aged at

: You can find detailed technical diagrams and safety instructions in the official Marshall Handwired Series Manual . : You can find detailed technical diagrams and

The is a hand-wired, 18-watt reissue of the legendary 1958 "Mini Bluesbreaker" combo amplifier. Hand-built in the UK, this all-valve 2x10" amplifier is part of Marshall's prestigious Handwired Series , designed to recreate the authentic tones of the 1960s at more manageable volume levels. Core Specifications Power Output : 18 Watts. Core Specifications Power Output : 18 Watts

: This amp is designed to be played "cranked." For authentic blues-rock tones, set the volume high and use your guitar's volume knob to clean up the sound. Maintenance