Shure fp12 owners manual

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THE SOUND OF THE PROFESSIONALS®

SHURE "

222 HARTREY AVE., EVANSTON, IL 60202-3696 U.S.A.
AREA CODE 312/866-2200- CABLE: SHUREMICRO

PROFESSIONAL PRODUCTS

GENERAL .

The FP12 is an in-line, battery-powered amplifier
designed to accept a microphone- or line-level signal,
bridge it, and produce a signal sufficient to drive head-
phones at very loud levels. The FP12 is ideal for anyone
in the broadcasting, sound reinforcement or audio re-
cording fields who has a need for headphone moni~
toring or checking microphone- or line-level cable runs.
In addition, the FP12 can be used to provide multiple
headphone feeds, a two»station intercom, extra power
for existing headphone circuits, or a means of practic-
ing electronic instruments through headphones

FEATURES

I Wide-range frequency response

a Low input noise and harmonic distortion

d High-impedance bridging input does not load signal
source

I Switchable microphone» and line-level inputs

a Switchable low- and high-impedance headphone out-
puts

a Parallel 3-circuit phone and miniature (3.5 mm) head~
phone jacks

Balanced Ioop~through locking XLR connectors and
phone jacks

d Powered by easily obtainable 9V alkaline battery
I Low current drain for extended battery life

I Rugged construction, with durable belt clip for field
use

I Low susceptibility to radio~frequency interference

SPECIFICATIONS
Frequency Response (ref1 kHz)
40 Hz to 15 kHz, +1,-3 dB

Equivalent Input Noise

-118 dBV (maximum gain; source resistance 150
ohms; 300 Hz to 20 kHz)

Copyright 1985, Shure Brothers Inc.
27119072 (EH)

Voltage Gain (ref 1 kHz)

Headphone
Input Impedance Impedance Gain
Mic Lo-Z 4 ohms total (8 ohms 70 013
Line per earphone, parallel) 20 dB
Mic Hi1 1 k total (2k per ear- 96dB
Line phone driver, parallel) 46 dB

Total Harmonic Distortion
Less than 1% (40 Hz to 15 kHz; measured at 10 dB
below clipping point)

Input Clipping Levels (at1 kHz)
Mic Input: 200 mV (-14 dBV)
Line Input: 60V ( +35 dBV)

Output Clipping Levels
Lo-Z: 750 mV ( -2.5 dBV) (load resistance 4 ohms
total; 8 ohms per earphone driver, parallel)
Hi~Z: 15V(+ 23 dBV) (load resistance 1 k total; 2k
per earphone driver, parallel)

Input Impedance (ref 1 kHz)
Mic: 7.5 kilohms i10%
Line: 66 kilohms i10%

Output Impedance (ref 1 kHz)
Lo-Z: 16 ohms :10%
Hi-Z: 440 ohms i10%

Phase
Input in phase with output. Pin 2 of Mic Input in phase
with Phones (both phone jacks and mini jacks) tip
and ring

Protection
Protected against damage from shorted outputs, (up
to 5V [ + 14 dBV] input signals)

Power
Type: 9V alkaline battery
Battery Life: Approximately 10 hours under normal
operating conditions
Current Drain (typical): 6 mAdc (idle); 72 mAdc
(clipping)

Temperature Range

Operating: 0 to 49°C (32" toi20°F)

Storage: ~29°to 74°C ( ~20°to 165° F)
Connectors

Input/Output

Locking 3-socket XLFt, Locking 3-pin XLR,
phone jacks (2)

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Headphones Output: Phone jack (2)

Mini Jack (2)

Battery Test
Insulated tip jacks; red (positive) and black
(negative)

Case .
Die-cast Zinc; matte black enamel

Overall Dimensions
80.9 mm x150 mm x 55.5 mm (3-3/16 x5-11/16 x2-3/16
in.)

Net Weight
501 grams (1 lb 2-1/2 02)

CONTROLS, CONNECTORS, INDICATOR

Level Control . applies power to FP12 circuitry and
sets headphone output level. Knob position also in-
dicates when power is applied.

Mic-Line Switch: selects microphone- or line-level sig-
nal source.

Hi-Z/Lo-Z Switch: selects operation with high-
impedance (greater than 600 ohms) or low-impedance
(less than 600 ohms) headphones.

In/Out XLR and Phone Jacks: provide loop-through in-
put and output connections for balanced microphone-or
line-level signal sources.

Phones A, B Jacks: provide for connection to high» or
low-impedance headphones. Note that A and B head~
phone jacks can be used simultaneously. Each output
can accept a headphone phone plug or mini plug.

Batt Test Jacks: can be used to check condition of 9V
battery.

OPERATION

Battery Replacement

Use a coin or screwdriver, turning one-quarter turn in
either direction, to open the battery compartment door.
Insert a fresh 9V alkaline battery (NEDA 1604A, Duracell
MN1604, Eveready 522, or equivalent) in the compart-
ment. Note that the battery contacts are polarized, and
the battery cannot be inserted improperly. The compart-
ment door can be closed by pressing shut with the
fastener properly aligned.

Connections

Connect the signal source (microphone- or line-level)
to the appropriate ln/Out connector (XLR or phone
jack), and set the Mic-Line switch. Connect the parallel
signal In/Out connector (XLR or phone jack) to the input
of mixer, tape recorder or amplifier. Connect the head-
phones (one or two units) to the Phones A, B jacks, and
set the Hi-Z/Lo-Z switch to the proper position for
or low-impedance headphones.

Operation

Position the FP12 for operation. Note that the belt
clip can be used to secure the unit to a belt, trousertops,
or D-rings on other equipment. The belt clip can easily
be removed if desired.

Rotate the Level control from the Off position to the
desired listening level. Note that the exposed color dot
on the Level control knob serves as a reminder that the
unit is on,

Battery voltage can be checked at any time without
removing the battery or turning the unit on. Inserting
voltmeter leads in the Batt Test jacks (observe proper
polarity) will indicate battery condition.

GUARANTEE

This Shure product is guaranteed in normal use to be
free from electrical and mechanical defects for a period
of one year from date of purchase. Please retain proof
of purchase date. This guarantee includes all parts and
labor. This guarantee is in lieu of any and all other
guarantees or warranties, express or implied, and there
shall be no recovery for any consequential or incidental
damages.

SHIPPING INSTRUCTIONS

Carefully repack the unit, have it insured, and return it

prepaid to:

Shure Brothers Incorporated

Attention: Service Department

222 Hartrey Avenue

Evanston, Illinois 60202-3696
If outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair.
The unit will be returned to you prepaid.