Top view – Manley LAB SERIES MONOBLOCK 100 WATT AMPLIFIER User Manual
Page 6
Amplifier Overhead View
Tube Location & Bias adjust points
OUTPUT TUBES:4 x RUSSIAN EL34/6CA7
The EL34's used are the Russian up-rated EL34's. This has been proven to be the rugged and reliable of this type. The
MANLEY 100 WATT MONOBLOCK has been thoroughly optimised around this tube. Use of unapproved tube types can and
will void your warranty.
DRIVER TUBES: 1 x 6414
The 6414 is an American military uprated version of the 12BH7A with increased current drive.
INPUT TUBE: 12AT7WA
The 12AT7WA has several equivalent numbers, (12AT7, 12AT7A, 6201, ECC81, etc.) Any of these types may be
used. We have selected this 12AT7WA very carefully for noise, microphonics, and constancy. Replacement tubes of premium
quality are always available from MANLEY LABORATORIES.
TOP VIEW
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3
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4
12AT7
6414
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2
3
4
BIAS MEASUREMENT POINTS
MASTER
BIAS
ADJUST
BIAS ADJUSTMENT POINTS
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2
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4
AC BALANCE
MEASUREMENT
POINTS
AC BALANCE
ADJUST