Shure FP22 User Manual

GENERAL

The

FP22 is a provides unique

headphone feeds from

capability of monitoring mono, stereo and mixed mono and

battery-powered stereo headphone amplifier that

any audio input source. It has the

stereo inputs. The FP22 monitors and combines these signals in the headphones without affecting the original signal. Stereo or

headphone outputs appear on 1/4-inch phone or mini 3.5 mm

mono stereo

jacks. The FP22 can drive headphones to very loud levels.

is ideal for anyone in the broadcasting, sound reinforcement or audio recording fields who needs a flexible, high–quality headphone

monitor

The FP22 is excellent for:

• Line

checking applications

•

Providing multiple headphone feeds

•

On stage in-ear monitoring

•

Boosting headphone circuits

•

Headphone foldback in recording studios

• Practicing musical instruments or mixed vocals through headphones

monitoring a stereo source

while

Features:

Exceptionally wide frequency response and dynamic range

•

High-impedance bridging inputs do not load signal sources

•

Capable of mixing mono and stereo inputs in headphone outputs

•

Complete user control of headphone volume

• Loopthrough

become

• 30

dB pad for stereo line input to accommodate a wide range of line level

sources

• Balanced

level

•

Separate XLR volume control on pull-out control knob

1/4-inch stereo phone jacks (can be internally switched

separate left and right inputs)

loopthrough XLR connectors switchable from mic to line

Shure

Brothers Incorporated

222 Hartrey A

venue

Evanston IL 60202-3696 U.S.A.

Model FP22 User Guide

•

Overall headphone balance control

•

Overall stereo/mono switch for headphones

•

LED power indicator

•

24 Vdc power supply (such as Shure Model PS20 or PS20E)

•

/4-inch and 3.5 mm stereo headphone jacks

• Effectively shielded for low susceptibility to radio-frequency interfer-

(RFI)

ence

SPECIFICATIONS Frequency

20 Hz to 20 kHz, +1, –3 dB (stereo line input) 50 Hz to 18 kHz, +1,–3 dB (mono XLR input)

Equivalent Input Noise

–125 dBV (maximum gain; source resistance 150 Ω; 20 Hz to 20 kHz)

oltage Gain

(pa

otal Harmonic Distortion

Less stereo

Input Clipping Levels

Mic level Line

Output

Headphones

Impedance

Input Impedance

XLR (mic level) XLR Stereo Stereo

Headphone

10.2 Ω ± 10%

Response

(ref 1 kHz)

(at 1 kHz)

Source

Input

XLR

Impedance

150

(mic level)

XLR

600

(line level)

Stereo line

600

(pad at 0 dB)

Stereo line

d at –30 d

600

than 0.5% measured at –8 dBV into 8 Ω

line input; 50 to 18 kHz mono XLR input)

(at 1 kHz)

. . . . . . . . . . . . . . . . . . . . . . . . . . .

level

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Level at Clipping

FP22 Out-

put

Ω

1.2 V (1.6 dBV)

Ω

500 mV (–6

dBV)

. . . . . . . . . . . . . . . . . . . . . . . . . . .

(line level)

Line (pad at 0)

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

Line (pad at 30 dB)

Output Impedance

alkaline

battery or by external 12

Gain

o 63

–4

± 5

± 4

Ω)

(int

Ω

(20

160 mV (–16 dBV)

50 V (+34 dBV)

Headphones

Sensitivity

106 dB at 1

Head-

phones SPL

120 dB

95 dB at 1

. . . . . . . . . . . . . . . . . .

(at 1 kHz)

Gain

(into 8 74

± 5

± 4

–10

Hz to 20

10 dB

6.3 kΩ 66 kΩ 50 kΩ 53 kΩ

± 4

Ω)

kHz

±10%. ±10%. ±10%. ±10%.



1997, Shure Brothers Inc.

27A8362

(QE)

Printed in U.S.A.

Phase

Input in phase with output. Pin 2 of XLR input in phase with

and ring of all Headphones jacks.

tip

Power

Internal Battery

. . . . . . . . . . . . . . . . . . . . . .

Life

. . . . . . . .

External Current

emperature Range

Operating 0o to 49oC (32 Storage –29o to 70oC (–20o to 165oF).

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

drain (typical)

. . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

One 9 V alkaline battery

Approximately 15 hours under

normal operating conditions

12 to 24 Vdc

1 mAdc; 80 mAdc

(clipping)

at 9 Vdc

120oF).

Connectors

Loopthrough

Two

3-pin balanced XLR-type connectors (one male, one fe

male)

/4-inch stereo phone jack (tip-left; ring-right; sleeve-

Two ground)

Headphones

wo 1/4-inch stereo phone jack headphone outputs

wo 3.5 mm stereo mini jacks

Power

6.5 mm coaxial power connector (tip +, sleeve –)

Case

Die-cast zinc; matte black enamel finish

Overall Dimensions

80.9 mm H x 55.5 mm W x 153 mm D (3-3/16 x 2-3/

6-1/16 in.)

Net Weight

450 grams (1 lb)

NOTE

: The FP22 is lightweight and can be clipped to a belt or trousertop, clip

or to D-rings on other equipment. The FP22 belt

is attached to

the case with two easily removable screws. The FP22 will stand on a flat surface, and several units can be stacked together with their belt clips removed.

SETUP Battery Replacement

1.Use

a coin or screwdriver to

in either direction to open the battery compartment door

turn the 1/4-turn lockscrew fasten

2.Insert a fresh 9–volt alkaline battery (NEDA 1604A, Duracell MN1604A, The tery minals

Eveready 522, or equivalent)

in the compartment.

battery compartment is designed so that the polarized bat

terminals cannot be inserted incorrectly

. Plated spring

ter

ensure solid electrical contacts.

External Power

coaxial dc power jack accepts a dc voltage from

The volts. External dc power feeds a regulator to power the FP22 cuitry.

The dc input jack is directly compatible with Shure Model

12 to 24

cir

PS20 or PS20E Power Supplies. The tip of the coaxial jack is positive serted

(+), the sleeve is negative (–). A coaxial power plug in

into the external power jack disables the internal battery

power.

Signal Connections

Mono XLR

—Microphone– or line–level signals

1.Set the Mono XLR Mic-Line switch to the appropriate signal

level.

2.Connect a balanced microphone or line level signal to either

Mono XLR jack.

3.If

loopthrough

is desired, use the unused XLR connector as an

output.

NOTE:

o d

amag

e will r

esul

t i

f the M

ic-Lin

e s

witc However, are

onitore

Stereo Line

1.Connect

bjectionabl

d with t

e d

istortio

he switc

h i

n the M

n may r

—Line– or Aux–level signals only

a 1/4-inch stereo connector to either Stereo Line jack.

h i

esul

t i

f line l

ic position.

2.If loopthrough is desired, use the unused 1/4-in. stereo connector

as an output.

3.Set th

e f

ron

t p

ane

l S

tere

o Line Pad to the 0 dBm l position. The –30 dB position is used when the FP22 line–level input signals ar

NOTE:

As explained in the

FP22

can

e +

4 dBm o

r g

reater.

Internal Switches

description, the

accept left and right input signals on separate con nectors. Stereo Line jack (1) is left, Stereo Line jack (2) is right.

Headphones

1.Connect

NOTE:

headphones to the Headphones A and B jacks.

Each pair of Headphones jacks consists of one 1/4-inch and one 3.5 mm stereo connector. Only one connector of each

pair can be used at

connector

disconnects its associated 3.5 mm connector

one time. Plugging into the 1/4-inch

OPERATION

NOTE:

A simplified block diagram on the side of the FP22 pro-

vides a quick reference to its functional circuitry

1. Rotate the overall Volume control clockwise to power the The Power LED indicator lights to

FP22.

show that the unit is on. Turn the level control carefully to avoid excessive headphone

levels. The V

signal

and Stereo Line signal.

olume control adjusts both the Mono

WARNING

The FP22 can produce ear–damaging headphone levels. Turn the headphones Volume control up slowly

when making adjustments.

2.Pull out the Volume control knob and rotate clockwise to increase

the volume level of the Mono XLR signal justment tion

3.Rotate right

4.If

Mono.

INTERNAL SWITCHES

signal tically mounted printed circuit board inside the unit adjacent to

the Loopthrough phone jacks. To access the switches, remove

the

will not af

fect the overall volume. A center detent posi

provides a starting volume level for the Mono XLR signal.

the Balance control left or right to control the overall left/

signal balance.

mono monitoring is desirable, set the

Two

switches

path

are located inside the FP22. These control the

through the unit. The switches are located on the ver

Stereo/Mono switch to

three Phillips-head screws on the side panel of the unit.

Internal Switch S-104 consists of two independent single-

pole,

single–throw switches

input

signal:

1.When

S104-1 and -2 are in the On position, the Mono XLR sig

nal

is routed to both left and right earphones.

2.When S104-1 is in the On position and S104-2 is in the Off

position,

the Mono XLR signal goes to the left channel.

controlling the path of the Mono XLR

3.When S104-1 is in the Off position and S104-2 is in the On

position,

If both S104-1 and -2 are in the Off position, NO signal from

the Mono XLR signal goes only to the right

the Mono XLR input appears at the headphone outputs.

Internal Switch S105 is a two–position slide switch that changes puts

1. When interna

the Stereo Line jacks from Loopthrough TRS stereo in

to separate left and right mono inputs.

l s

witc

h S105 i

a s

tere

left; ring-right

o s

igna

; s

l o

leeve-ground)

n a s

s set for s

ingl

e 1/4-inc

. This a

tereo

llow

, the S

h s

tere

s for a l

o c

s set i

ncorrectly.

eve

ine–leve

only

. This ad

channel.

tere

o Line j

onnecto

oopthroug

l s

ignals

ignal

XLR

acks

r (

tip-

h o

f a

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