Manley MONO & DUAL MONO 40 dB MICROPHONE PREAMPLIFIERS - Manual (Page 3)

INTRODUCTION
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THANK YOU!...
for choosing the Manley Laboratories Microphone Preamplifier. We use this manual for both the
MONO and DUAL MONO versions designed by David Manley. They are identical except the
DUAL has two of everything. These Microphone Preamplifiers use the best available parts with the
shortest, cleanest, signal path possible. The Preamplifier features an all-tube circuit that has proved
to be among the finest amplification circuits for demanding audio professionals. It combines flat
frequency response, very high headroom, low noise and low distortion. The Preamplifier also has the
Input Attenuator before any tube stage so that it can easily accomodate any reasonable signal level.
There is also a rotary GAIN switch which helps to change the preamplifiers operating characteristics
to suit a wide variety of tastes and styles. There is both balanced and unbalanced inputs and outputs
so that the preamplifier can interface with virtually anything without hassle. Phantom power is
provided.
Thank you again, and please enjoy!
GENERAL NOTES
LOCATION & VENTILATION
The 40 dB Microphone Preamplifier must be installed in a stable location with ample ventilation. It
is recommended, if this unit is rack mounted, that you allow enough clearance on the top and bottom
of the preamp such that a constant flow of air can flow through the ventilation holes.
WATER & MOISTURE
As with any electrical equipment, this preamplifier should not be used near water or moisture. If
liquid enters the preamplifier, it must be immediately returned to your dealer for servicing.
SERVICING
The user should not attempt to service the preamplifier beyond that described in the owner's manual.
Refer all servicing other than tube replacement to Manley Laboratories.
SPECIAL NOTES
Tubes may become loose during transit. Straighten and press down each tube before plugging the
preamplifier into the mains socket. Furthermore, NEVER touch the tubes after the preamplifier has
been switched on, the tubes become very hot during operation and should only be handled after the
power has been turned off and the tubes have cooled. Please note high voltages inside the chassis.
WARNING!
TO PREVENT THE RISK OF ELECTRIC SHOCK
DO NOT OPEN THE CABINET
REFER SERVICING TO
QUALIFIED PERSONEL