Manual

OPERATIONAL NOTES
SWITCHING ON
The power switch is located on the right hand corner of the front panel. Flip the switch up to turn on
the preamplifier and down to turn off the preamplifier.
RUNNING
It is not recommended that you leave your preamplifier permanently switched on. This only wastes
electricity and tube life. Your preamplifier has solid state rectification and reaches peak operating
condition in approximately 30 minutes.
TUBE LIFE
As with all tubes, their quality degrades with age. This is due to cathode emission, a natural process
found in all tubes. We recommend that you have your preamplifier checked every 4-5 years,
depending on usage, usually the preamplifier will require re-tubing after this time has elapsed.
Increased noise or tube "rush" is an indication that you should retube. Premium selected tubes can
always be purchased at Manley Labs, and at very reasonable prices too!
SPECIAL NOTES
The 60 dB Microphone Preamplifier is optimised for use with dynamic or ribbon mics or other lower
output microphones or low level programme material. We also build excellent 40dB mono and dual-
mono (2 channel) versions which suit most of the popluar condensor mics under normal recording
conditions. Ask your dealer or us here at Manley Labs which model is right for your needs. We are
always happy to provide you with technical assistance.