OPERATION
The 545 is simple to use. The amount of gain reduction is
adjusted with the DISRUPTION control in conjunction with
the X4 switch. The X4 switch multiplies the sensitivity of the
sidechain by a factor of four, allowing the 545 to be used
effectively on low level signals. Low frequencies are affected
most significantly, with the effect becoming increasingly less
active as frequency rises. Because the resulting distortion is
the desired effect, a traditional gain reduction meter is not
included. Your ears should be the judge to determine the
amount of effect to apply. Compression can be viewed as a
byproduct of distortion as in traditional cases. The red LED
lights up when gain reduction is taking place in the same
manner as the LEDs in the optoisolators, providing an
indicator that gain reduction is taking place.
The MAKEUP control is an output level control to allow the
user to restore level lost in gain reduction. As with the
DISRUPTION control, the numbers 0 - 40 do not refer to dB
or anything like that. They are simply a divisible set of
numbers which make recall of settings easy.
Finally, the IN switch activates the sidechain. Disengaging
this switch silently bypasses the unit, although the audio path
remains active.
WARRANTY
The XQP 545 Optical Disrupter is warranted for ten years
from the date of purchase. You do not have to fill out the
enclosed warranty card, but we would appreciate the info.
You may also register your 545 online at www.xqpaudio.com.
XQP
610 N. 14th Street
Enid, OK 73701
580-231-1941
www.xqpaudio.com 1.4
We think you will find the 545 a very
unique tool for adding creative distortion
to a sound source. Subtle amounts can be
used to create a slight thickening, ala tape
saturation. But quite noticable distortion
can be achieved on most sources
containing information in the low
frequency region.
INTRODUCTION
Thank you for purchasing the XQP 545 Optical Disrupter. The 545 is compressor
that creates an asymmetrical waveform in the low frequencies. There is no clipping,
because an amplifier stage is not being overdriven. Instead, the LEDs in the dual
VACTROL® optoisolators are driven by an AC signal which modulates the audio
during gain reduction in a manner that producs even-order harmonic distortion.
The 545 is a VPR module (hopefully you are already aware of this) designed to fit into
the common 500 series racks orginated by API. It follows the standard API pinout.
VPR Alliance approval pending as of 7/30/10.
