Mastersound PH L5 - Manual (Page 7)

M a s t e r E m o t i o n 7
Maintenance of the amplifier
Use gently a wet and soft cloth (buckskin) to clean Your amplifier and dry
immediately.
Never clean Your pre amplifier when hot or running.
Do not forget to take out the plugs before starting to clean the pre amplifier.
Last recommendations
Any change of interconnectors (cables, etc...) must be done with the pre amplifier
switched in the off position.
Never move or remove the pre amplifier when tubes are still hot.
Never install or remove tubes when the pre amplifier is still switched in the on
position.