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222 HARTREY AVENUE
SHU-
@EVANSTON, ILLINOIS 60202-3696 U S A .
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THE SOUND OF THE PROFESSIONALS'
P R O F E S S I O N A L P R O D U C T S
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GENERAL
Listed by Underwriters Laboratories Inc.; listed by Cana-
The FP51 is a compact, portable, high-quality gated memory
dian Standards Association as Certified
compressor
combined with a four-input, one-output
microphone mixer. Designed for applications in broadcasting,
SPEClFlCATlONS
recording and sound reinforcement, the FP51 integrates all the
features of professional compressors and mixers in a single
Frequency Response
unit-small and lightweight enough for location use, but with
30 to 20,000 Hz,
2
2 dB
the reliability of a studio console.
Voltage Gain (at 1 kHz)
FEATURES
OUTPUT
40 dB compression range, with compression ratio approx-
INPUT
PHONES
imately 10:l in normal operating range
MIX BUS PHONES
(CUE)
Gated memory minimizes "pumping," has LED indicator
True average-responding compression maximizes output
Line
55dB
5 d B
-25dB
6 5 d B
45dB
level regardless of peak-to-average ratio of program
Mix Bus
70dB
20dB
- -
80dB
- -
material. Peak-responding circuit reduces gain rapidly for
significant increases in input signal
Inputs
Front-panel response rate adjustment (averaging time con-
lMWX)ANCE (at 1 kHz)
INPUT CLIPPING
stant) compensates for variations in program material
INPUT
FOR USE WITH
ACTUAL
LEVEL AT
1
kHz
Extremely low distortion, noise and RF su'sceptibility, with
25-600Q mics
wide, flat frequency response at all compression levels
Reliable operation under wide temperature and humidity
Line
level sources
conditions
Mix Bus
>3.5k
3.5k
+ 2 dBV
Protected against damage from input overload and
shorted outputs
*Dependent on input control setting.
Four transformer-coupled XLR inputs, each micro-
outputs
phonelline switchable with low-cut filter and cuing func-
tions
Phantom power for condenser microphone operation
OUTPUT
Built-in tone oscillator permits checking levels and testing
lines
Mic
Transformer-coupled XLR output with microphonelline
switch
Line
Headphone jacks (114-inch and mini-3.5 mm) with level con-
Mix Bus
trol
Active, feedback-type input gain controls allow high-level
Headphones
input signals without input attenuators
Illuminated triple-function VU meter indicates output level,
Compressor
dB compression and battery condition
Threshold:
-88
dBV typical at maximum input gain
Powered by ac (120V or 240V-internally
selectable) or
(mic); -38 dBV typical at maximum input
built-in battery pack
gain (line)
Low battery drain provides up to 10 hours operation under
Ratio: 8:l minimum from 10 to 20 dB comprssion
normal conditions
5:l minimum from 10 to 30 dB compression
Noiseless and automatic switchover to and from battery
Attack Time: 3 msec for level increases greater than 15
power without affecting compressor
dB; 120 msec to 6 sec for increases of less
Rugged, durable construction
than 15 dB
Compact and lightweight for field use and transporting
Recovery Time:
120 msec to 6 sec
Rack-mountable with accessory rack mount kit
Copyright 1989, Shure Brothers Inc.
Printed in U.S.A.
27A2216 (IJ)
OUTPUT CLIPPING
LEVEL AT
1
kHz,
5% THD
-34 dBV min.
(150-ohm load)
+
18 dBm min.
(600-ohm load)
- 7 dBV min.
(3.5k load)
+
7 dBV min.
(200-ohm load)
WJEDANCE (at 1 kHz)
FOR USE WITH
25-600Q mic
circuits
600 ohms
3.5k
8-2000 ohms
ACTUAL
1 ohm or
less
185 ohms
3.5k
100 ohms
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