Labo
★
K
Effects –
www.labo-k-effects.com
–
4
overview
Description of modules is extracted from the Neve 51 service manual
This device contains 2 pre 2 equalizers from a NEVE 51 serie mixing desk.
Each channel consists of one micro/line preampli, one high pass and low pass filter
section. Each preampli module contains a Dynamics section featuring a limiter/gate.
One 4-band parametric equalizer.
One ba4dB insertion movable pre or post equalizer.
One ba4dB output stage.
Facilities :
Mic gain range (switched) 0 to +80dB in 10dB steps.
Mic gain (variable) ±10dB on Mic Trim control.
Line gain, -12dB to +8dB switched in 2dB steps or potentiometer controled according to
the version.
Phase inversion facility.
High pass filter 31Hz to 315Hz, adjustable 24dB/octave slope.
Low pass filter 4KHz to 12.5KHz, 12dB/octave steps.
Signal threshold.
The indicator led lights when the signal level is above +4dB
Threshold can be set differently using a trimmer inside the rack.
« OD » switch wiring has been modified to allow the activation of the 48V power supply
required for condenser microphones. A yellow Led indicates the presence of this power.
Dynamics section gives the following facilities :
« Soft Limit », « Hard Limit » and « Gate » facilities with threshold of each controlled by
the « THRESHOLD » control. Fast or normal attack, linking of channels as indicated by
the « --
» button. The Led shows limiting in progress.
An internal power supply provides the voltages necessary for the operation of the
modules. The AC input of the R-Core type transformer is protected by a fuse accessible
from the outside.
The provided regulated voltages are :
1)
+/- 16v for audio parts.
2)
-15v for logic and Leds.
3)
+48v for phantom power.
Modules have been recapped and defectives flex strips were replaced.
Switches have been cleaned. All modules tested and adjustments have been done.
Micro, Ligne inputs and channel outputs are wired on Neutrik XLR.
Insertion sends and returns are wired on Cliff stereo Jacks.
The pin assignment is as follows :
XLR
Pin
Jack
Pin
Hi
2
Hi
Tip
Lo
3
Lo
Ring
Gnd
1
Gnd
Sleeve
