8
9
OPERATING THE P331 TUBE LOADING AMPLIFIER
XLR INPUT
- CHANNEL 2 (STEREO RIGHT)
BALANCED
Pin 2 Hot
XLR OUTPUT
- CHANNEL 2 (STEREO RIGHT)
BALANCED
Pin 2 Hot
XLR INPUT
- CHANNEL 1 (STEREO LEFT)
BALANCED
Pin 2 Hot
IEC POWER INLET MODULE
High quality IEC mains connector for 50 /60 Hz AC with integrated fuse holder.
(INPUT MAINS VOLTAGE 115VAC - 230VAC) Fuses = T4A L 250VAC SLO-BLO
XLR OUTPUT
- CHANNEL 1 (STEREO LEFT)
BALANCED
Pin 2 Hot
115V
A
A
B
C
D
E
B
C
E
D
The P331 was originally conceived as a mastering and mix buss processor, however, the circuit was
designed to enhance anything that runs through it. When we decided to offer this unit to others we
didn’t want to limit its potential. For this reason we designed it as dual mono as opposed to stereo
only. We wanted to ensure tracking and mix engineers had the ability to experiment with enhancing
any of their tracks or captured performances. While the P331 does not have the available gain to
function as a standalone microphone preamp, it can be used effectively as a worthy addition to any
traditional recording chain.
The P331 can be somewhat of a chameleon in that how it reacts is highly dependent on the source
material its being fed. We are of the school that there is no right and wrong when it comes to art.
Close your eyes, turn the knobs. Ultimately, your ears will and
should
guide you.
GETTING STARTED
Make sure all XLR connections are made before hooking up the AC Power Supply cord and powering
the P331 on. After the Power is switched to the on position (switch is integrated into the Power
Inlet Module at the rear of the unit), the INDICATOR PILOT LIGHT on the front panel will begin to
gently pulse. This pulsing indicates the unit is in “warm-up” mode. During this warm up period
(approximately 3 minutes) the outputs are automatically muted. Once the P331 is ready for use the
pilot light will stop pulsing and will remain lit, the outputs will be automatically taken out of auto-
mute and the unit is ready to rock. We do typically, however, let any of our tube gear (including the
P331) warm up for 30-45 minutes prior to any critical listening or processing.
REAR PANEL CONNECTIONS
Summary of Contents for P331
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