FRONT PANEL
A & B - INPUT SELECTS - 6 Position switches for input selection. There is one switch per channel to
preserve absolute separation. The RECORD OUT directly follows these switches.
C - VOLUME - 24 Position switch with precise 2 dB steps of attenuation throughout most of the range. The
most counter-clockwise position is mute, then , -60, -50, -46, -44, -42, -40 etc in 2 dB steps until -10, then the
next position is -6, then 0. This gives a wide range with good resolution in the middle. The preamp has 15 dB of
typical gain (Balance @ 12:00) thus unity gain is the 19th step. Left / right matching is typically within 1/10 dB
at any setting.
D & E - BALANCE CONTROLS - Individual level adjustments for each channel to preserve separation. Like
all balance controls we use them to center the image on some recordings or sources. Because these level
adjustments are actually in the negative feedback path they tend to change the "sound" of the preamp. This is a
unique feature in found in most of the Manley Preamps. As the balance controls are rotated clockwise the
feedback is reduced and the gain increases. You will need to adjust the Volume to compare sonic differences.
Musically, less feedback tends to produce a subtly more aggressive, fast, punchy and more forward
presentation. In systems that already have this tendency, the optimum setting will likely be from fully counter-
clockwise to the mid position. Some describe this as more laid back, mellow or passive. Experiment! There is no
right or wrong. Your taste will determine the position of these controls (or like us, maybe different settings for
different CD's or moods!). Rather than force some design dogma or fashion on you, we encourage you to
generate your own opinions and allow you to optimise the sound to your tastes. You also get to simulate the
presentation of a range of preamps - not just one.
F - MUTE - In MUTE there is silence. In "VOLUME" the volume control determines the listening level.
MUTE is mainly used to answer the phone or door without having to lose your volume setting.
G - POWER ON/OFF - This is the main and only AC power switch. Up = ON and the LED will light.
H -METER - This meter shows incoming AC Volts from the wall socket. With power on this meter should
center straight up and be stable. The stability is important. Low voltage or moderate variations should not affect
the performance of the preamp because of the fully regulated supplies. Large variations or low voltages common
in some areas might affect performance but it is likely other components in your system will start acting up first.
C
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A D K L M N E B
G I H
7
(11 pages)
(13 pages)
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