Altec Lansing 1707C MIXER AMPLIFIER User manual

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LANSING:'

1707C/1715C

Six

Channel

Mainframe

Mixer/Power

Amplifier

KEY

FEATURES

*

Six

ports

for

inputs

or

outputs

*

Offers

systemwide

remote

muting

*

Built-in

compressor/limiter

KEY

SYSTEM

SPECIFICATIONS

(Ref.

1

kHz)

+1

dB,

20

Hz

-

20

kHz

(1

watt

output)

+1

dB,

20

Hz

-

20

kHz

(0.775

Vrms

output,

600

Q

load)

Frequency

Response:

Direct

Output:

Preamp

Output:

Total

Harmonic

Distortion

(THD):

Direct

Output:

(Ref

1

kHz)

<0.05%,

20

Hz

-

20

kHz

(rated

output

power,

30

kHz

low-pass

filter)

<0.05%,

20

Hz

-

20

kHz

(0.775

Vrms

output,

600

Q

load,

EQ

flat,

compressor/-

limiter

off,

30

kHz

low-pass

filter)

Preamp

Output:

Signal-to-Noise

Ratio:

Direct

Output:

(master

at

maximum)

Preamp

Output:

>80

dB

below

rated

output

power,

A-weighted

>75

dB

below

0.775

Vrms

output,

A-weighted,

EQ

off,

compressor/limiter

off

DESCRIPTION

The

Altec

Lansing

1707C/1715C

Mixer/Power

Amplifier

is

a

six

channel

user-configurable

main-

frame

amplifier.

By

selecting

from

the

large

array

of

system

component

options,

the

1707C/1715C

can

become

a

six-in/one-out

microphone

mixer/amp-

lifier

or

a

one-in/six-out

distribution

preamplifier.

The

basic

mainframe

combines

a

fully

protect-

ed

75-watt

(for

the

1707C)

or

150-watt

(for

the

1715C)

power

amplifier

with

six

ports

which

can

be

input

or

output.

Multiple

1707C/1715C

main-

frames

can

be

linked

together

for

situations

where

more

then

six

input/output

ports

are

required.

Built-in

features

include

a

trap-door

on

the

top

panel

for

easy

access

into

the

unit,

compressor/-

limiter,

low

and

high

frequency

shelving

equalizers,

muting,

remote

volume

control

capability,

and

a

tone

generator

which

produces

four

different

sounds.

Input

Modules:

The

Altec

Lansing

1780A/-

1780AT

Input

module

and

the

1781A/1781AT

Programmable

Input

module

accept

either

mic

or

line

level

signals

through

a

wide

variety

of

connec-

tor

interfaces.

Output

Modules:

The

Altec

Lansing

1783

Line

Output

module

allows

the

user

to

interface

with

other

professional

equipment.

The

Altec

Lansing

model

1707C/1715C

mix-

er/power

amplifier

systems

respond

to

most

design

tasks

with

the

ease

and

versatility

of

systems

costing

much

more.

Às

a

result,

it

is

the

choice

for

use

in

professional

installations

requiring

high

quality,

flexibility

in

design,

and

low

cost.

Continuous

Average

Power:

1707C:

1715C:

Maximum

Midband

Output

Power:

1707C:

1715C:

Power

Bandwidth:

Direct

Output:

Intermodulatlon

Distortion:

Direct

Output:

Damping

Factor:

Direct

Output:

Rated

Output

Level:

Direct

Output:

1707C:

1715C:

Preamp

Output:

Transformer

Output:

1707C:

1715C:

Equalization:

Bass:

Treble:

Compressor/Limiter:

Threshold:

Compression

Ratio:

Release

Time:

Tone

Generator:

Tones:

Control:

Level

Adjustment:

Protection

Svstem:

Amplifier:

Load:

Front

Panel

Controls:

input:

Compressor/Limiter:

1707C/1715C

Specifications

(cont'd)

75

watts

150

watts

(Ref.

1

kHz

at

1%

THD)

100

watts

175

watts

(Ref.

1

kHz

at

rated

output)

>20

Hz

-

20

kHz

(SMPTE

4:1)

<0.1%

at

rated

power

>40,

20

Hz

-

1

kHz

(Ref.

1

kHz)

(unbalanced)

24.5

Vrms/8

Q

load

24.5

Vrms/4

Q

load

(unbalanced)

0

dBm,

600

2

min.

load

(balanced)

17.4

Vrms/4

Q

load

25.0

Vrms/8

2

load

70.7

Vrms/66.6

Q

load

25.0

Vrms/4.2

Q

load

34.6

Vrms/8

2

load

70.7

Vrms/33.3

Q

load

(Shelving

type)

+12

dB

at

100

Hz

+12

dB

at

10

kHz

Feedforward

Topology

-20

dB

to

+20

dB

Continuously

variable

(Ref.

100

mVrms

on

Link

input)

1:1

to

0:1

Continuously

variable

50

msec

to

5

sec.

Continuously

variable

Electronically

produced

Buzzer,

siren,

single-tone

chime,

and

repeating

tone

chime

All

tones

are

initiated

by

external

switch

closures

Rear

panel

e

Short

circuit

current

limiting

e

Over

voltage

limiting

e

Thermal

sensing

e

Spurious

oscillatory

protection

e

Low

AC

line

sensing

e

Output

DC

detection

e

Subsonic

detection

e

Tum-or/off

transients

(=3

secs)

6

-

Input

Level

adjust

I

-

Release

Time

adjust

1

-

Threshold

adjust

1

-

Compression

Ratio

adjust

EQ

Controls:

Output:

Miscellaneous:

Rear

Panel

Controls:

Tone

Generator:

Front

Panel

Indicators:

Connectors:

Amplifier

Input:

Link

Input:

Battery:

Amplifier

Output:

Preamp

Output:

Link

Output:

Mute

and

Tone

Generator:

Power

Requirements:

AC

Mains:

Battery:

1707C:

1715C:

Power

Consumptlon

and

Heat

Produced:

1707C:

75

watts

output:

25

watts

output:

1715C:

150

watts

output:

50

watts

output:

Operating

Temperature

Range:

Dimensions:

Width:

Height:

Depth:

Net

Weight:

1707C:

1715C:

Finish

Color:

Accessories

Included

with

Malnframe:

1

-

On/Off

switch

I

-

Bass

adjust

1

-

Treble

adjust

I

-

EQ

In/Defeat

switch

I

-

Master

Level

adjust

l

-

AC

Power

switch

]

-

Output

Level

adjust

6

-

Green

LED's

(Nominal

Input)

6

-

Red

LED's

(Peak

Input)

I

-

Red

LED

(Main

Output

clip)

I

-

AC

Power

ON

I

-

RCA

phono

receptacle

I

-

RCA

phono

receptacle

I

-

3-terminal

barrier

strip

I

-

7-terminal

barrier

strip

1

-

RCA

phono

receptacle

I

-

RCA

phono

receptacle

7

-

Screw

terminals

(Ref.

1

kHz,

rated

output

with

no

modules

installed)

100/120/200/220/240

VAC,

50/60

Hz.

+48

VDC

bipolar

1.5

amps

maximum

3.0

amps

maximum

165

w

consumed,

306

BTU/hour

130

w

consumed,

357

BTU/hour

320

w

consumed,

578

BTU/hour

230

w

consumed,

612

BTU/hour

Up

to

50°C

(122°F)

19

inches

(48.3

cm)

5%

inches

(13.3

cm)

13

inches

(33.0

cm)

25

lbs.

(11.4

kg)

32

lbs.

(14.5

kg)

Black

1

-

Operating/Service

Instructions

for

Mainframe,

1780A/AT,

1781A/AT

and

1783

l

-

Preamp

Out

to

Amp

In

“U”

Shorting

Bar

l

-

Direct

Output

to

OT

in

Shorting

Bar

]

-

System

Configuration

Label

1

-

International

220/240

VAC

voltage

decal

l

-

International

Fuse

decal

and

fuse

1

-

Rack

mount

hardware

kit

Altec

Lansing

continually

strives

to

improve

their

products

and

performance.

Therefore,

specifications

are

subject

to

change

without

notice.

1780A/1780AT

Description

The

Altec

Lansing

1780A/1780AT

Mic/Line

Input

modules

combine

basic

microphone

preamplifi-

cation

with

true

line

level

input

capabilitv.

The

module

has

a

built-in

resistive

pad

to

permit

levels

in

excess

of

0

dBu

and

its

high

input

impedance

easilv

allows

sixteen

modules

to

be

driven

from

a

single

low

impedance

source.

Also,

the

module

offers

a

300

Hz

high-pass

filter,

phantom

power

capability,

L

+

R

stereo

summing,

and

0

to

50

dB

of

continuously

variable

gain.

Included

in

the

1780AT

version

is

a

10

kQ

input

bridging

trans-

former

for

those

who

prefer

transformer

isolation.

INPUT

1780A/1780AT

Specifications

Gain:

0

-

50

dB,

continuously

variable

Input

Sensitivity:

Without

Pad:

-68

dBu

to

-18

dBu

(.3

mVrms

to

100

mVrms)

-48

dBu

to

+2

dBu

(3

mVrms

to

1

Vrms)

With

Pad:

Input

Impedance:

1780A:

10

kQ

1780AT:

10

kQ

With

1793

Dual

Phono:

40

kif

Frequencv

Response:

50

Hz

-

20

kHz,

+1

dB

Total

Harmonic

Distortion:

(Ref.

minimum

gain,

90

Hz

-

20

kHz

measurement

bandwidth,

30

kHz

low-pass

filter)

1780A:

<0.01%

1780AT:

<0.025%

Equivalent

Input

Noise:

<-120

dBr

(Ref.

0

dBr

=

100

mVrms

out-

put,

10

kQ

load,

200

©

input

termination,

maximum

gain,

A-weighted)

High

Pass

Filter:

Comer

Frequency:

Slope:

Controls:

Weight

(Net):

17804:

Power

Supply

Requirements:

Included

Accessories:

*

FB1

4

FB2

IN

Block

Diagram

of

the

1780A/1780AT

Input

Module

300

Hz

12

dB/octave

1

-

Gain,

continuously

variable

2.5

oz.

(70

g)

3.0

oz.

(85

g)

+18

VDC

at

15

ma

DC

(supplied

bv

mainframe)

1

-

2-pin

female

jumper

(for

phantom

power)

2

-

mounting

screws

(for

potentiometer

bracket)

|

-

Operating

Instructions

1781A/1781AT

Description

The

Altec

Lansing

1781A/1781AT

Programmable

Input

modules

accepts

either

mic

or

line

level

signals

through

a

wide

variety

of

connector

inter-

faces.

Standard

features

include

an

electronically

balanced

input

stage

with

adjustable

gain,

continu-

ously

variable

high

and

low

pass

filters,

RFI

protec-

tion,

48

volt

phantom

powering

two

levels

of

muting,

and

remote

volume

control

capability.

Programming

with

plug-in

jumpers

which

may

select

phantom

power

(on

or

off),

mute

priority

or

slave,

or

remote

volume

control.

The

1781AT

module

also

comes

equipped

with

a

1785A

Input

Isolation

Transformer

which

provides

an

additional

10

dB

of

gain

for

improved

sensitivity.

+

IN

—

IN

RIGHT

CH

LEFT

CH

GND

Block

Diagram

of

the

1781A/1781AT

Input

Module

1781A/1781AT

Specifications

Gain:

1781A:

0

dB

-

50

dB,

continuously

variable

1781AT:

10

dB

-

60

dB,

continuously

variable

Input

Sensitivity:

(Ref.

I

kHz,

10

kQ

load)

1781A:

-68

dBu

to

-18

dBu

(0.3

mVrms

-

100

mVrms)

1781AT:

-78

dBu

to

-28

dBu

(0.1

mVrms

-

30

mVrms)

Input

Impedance:

(Ref.

1

kHz)

Electronically

balanced:

>8

k0

Transformer

balanced:

200

Q

-

600

Q

With

1793

Dual

Phono

Connector

Installed:

>39

kN

(Ref.

1

kHz,

100

mVrms

output,

10

kf)

load)

Frequency

Response:

17814:

X]

dB

(minimum

gain):

20

Hz

-

20

kHz

+1

dB

(maximum

gain):

50

Hz

-

20

kHz

1781AT:

+1

dB

(minimum

gain):

20

Hz

-

20

kHz

+1

dB

(maximum

gain):

90

Hz

-

15

kHz

Total

Harmonic

Distortion

(THD):

20

Hz

-

20

kHz:

Equivalent

Input

Noise:

High

Pass

Filter

(Low

Cut):

Comer

Frequency:

Slope:

Low

Pass

Filter

(High

Cut):

Comer

Frequency:

Slope:

Attenuation:

Mute:

(Ref.

1

kHz,

100

mVrms

output,

minimum

gain,

10

kN

load,

30

kHz

low

pass

filter)

<0.03%

(Ref.

0

dBr

=

100

mVrms

output,

10

kM

load,

200

Q

input

termination

maximum

gain,

A-weighted)

<-120

dBr

(Ref.

100

mVrms

output,

minimum

gain,

10

kf)

load)

320

Hz

(>10

dB

at

100

Hz)

6

dB/oct

(20

dB/dec)

(Ref.

100

mVrms

output,

minimum

gain,

10

kQ

load)

5

kHz

(>6

dB

at

10

kHz)

6

dB/oct

(20

dB/dec)

(Ref.

100

mVrms

output,

minimum

gain,

10

kQ

load)

>60

dB

(10

k(2

remote)

1783

Description

The

Altec

Lansing

1783

Line

Output

modules

pro-

vides

the

drive

capability

necessary

to

interface

with

other

professional

equipment.

The

electroni-

cally

balanced

output

stage

provides

a

low

source

impedance

to

drive

subsequent

stages.

If

trans-

former

isolation

is

necessary,the

module's

circuit

board

accomodates

the

optional

PC-mount

1786

Output

Isolation

Transformer.

The

continuously

variable

output

level

control

is

local

to

the

module

permitting

independent

adjustment

of

each

line

output.

1783

Specifications

Output

Source

Impedance:

«50

Q

Nominal

Output

Level

[Load

Impedance:

+8

dBm

(Ref.

1

kHz,

0

dBm

=

0.775

Vrms

with

600

(2

load,

output

level

control

at

maximum,

100

mVrms

input)

Maximum

Output

Level:

+24

dBm

Frequency

Response:

(Ref.

1

kHz,

+8

dBm

output)

+1

dB:

20

Hz-

25

kHz

Total

Harmonic

Distortion

(THD):

(Ref.

1

kHz,

+8

dBm

output,

output

level

control

at

maxi-

mum,

30

kHz

low

pass

filter)

20

Hz

-

20

kHz:

<0.05%

Signal

to

Noise

Ratio:

>88

dBm

(Below

+8

dBm

output,

out-

put

level

control

at

maximum,

A-weighted)

Power

Requirements:

+18

VDC

at

20

mA

(supplied

by

mainframe)

1786

Output

Isolation

Transformer

Impedance

Ratio:

1:1

(600

0:600

N)

Frequency

Response:

(Ref

1

kHz,

+18

dBm

output)

+]

dB:

20

Hz

-

20

kHz

Total

Harmonic

Distortion

(THD):

Ref

1

kHz,

+18

dBm

output)

20

Hz

-

20

kHz:

«0.596

50

Hz

-

20

kHz:

«0.196

Special

Ordering

Instructions

NOTE:

The

modules

listed

below

are

required

for

use

with

the

1707C/1715C

and

must

be

ordered

separate

from

the

mainframe.

Plug-in

Input

Modules:

1780A

Mic/Line

Input

module

1780AT

Mic/Line

Input

module

with

10

kQ

bridging

transformer

installed

1781A

Programmable

Input

module

1781AT

Programmable

Input

module

with

model

1785A

600

22

to

10

kQ

isolation

transformer

installed

1785A

600

Q

to

10

kQ

Input

Isolation

Transformer

for

installation

on

existing

model

1781A

Plug-in

Output

Module:

1783

Line

Output

module

1786

Output

Isolation

Transformer

Plug-in

EQ

Module:

8751A

Programmable

14-Band

EQ

module

NOTE:

Each

module

selected

requires

one

of

the

following

connectors

also

be

ordered:

1791

1792

Female

XLR

Male

XLR

1798

1794

Dual

RCA

Phono

r

5-Lug

Terminal

CONFIGURING

THE

MAINFRAME

The

Mainframe's

Inner

Workings

MODULE

OUT

"NOMINAL

yoyo

‘PEAK’

100mV

RM

ZIN-

ek

IN

Tr

1

INPUT

OUTPUT

MIX

OUT

INPUT

with

mainframe

LEVEL

SUM

EI

33

e

f

a

I

ê

a

a

100mY

RMS

MUTE

f

SUMMING

|

BUS

i

|

=

ét

—

44)

5

BUZZER

P

TONE

GEN

YELP

å

OUTPUT

ODEFEAT

QOFF

jo

JOON

COMP/LIM

i

PR

vy;

=]

li

DIN

SHELVING

EQUALIZER

BASS

TREBLE

/

!

RELAY

!

l

THRESHOLD

COMP

REL

,

RATIO

TIME

|

100mY

RMS

Z

IN

-

10K

LEVEL

u

E

LINK

OUT

O

“LE

C

0.775V

AMS

AMPIN

AUX

DUT

MASTER

POWER

AMPLIFIER

BARRIER

TRANSFORMER

STRIP

POWER

ON

E

A

ue

a

VOLTAGE

POWER

SAC

UNE

SELECTOR

|

SWITCH

FUSE

100/120/200/220/

240VAC

50/60HZ

JK

USER

INSTALLED

STRAPS

+V

VOLTAGE

POWER

du

RAILS

SUPPLY

ó

6

à

i

:

S

*48V

OC

INPUT

1707C/1715C

System

Block

Diagram

ARCHITECT'S

and

ENGINEER'S

SPECIFICATION

The

mixer/power

amplifier

shall

have

six

configurable

ports

and

be

capable

of

operating

from

100,

120,

200,

220,

or

240

Vac,

50/60

Hz

line,

or

from

+48

VDC.

Each

port

shall

be

usable

with

a

microphone

or

other

high

level

device.

The

mixer/power

amplifier

main-

frame

shall

include

a

compressor/limiter,

low

and

high

frequency

shelving

equalizers,

and

a

tone

generator

capable

of

producing

general

purpose

and

emergency

warning

signals.

The

power

amplifier

shall

meet

the

following

perfor-

mance

criteria:

Power

Output:

75

watts

(1707C)

at

less

than

0.05%

THD

from

20

Hz

to

20

kHz

(8

Q

direct

output),

or

150

watts

(1715C)

at

less

than

0.0596

THD

from

20

Hz

to

20

kHz

(4

2

direct

output).

Frequency

Response:

20

Hz

to

20

kHz,

+1

dB

(direct

output).

Source

Impedance:

150

Q

to

250

Q

nominal

with

a

microphone

preamplifier,

600

Q

with

a

bridging

transformer,

150

(2

to

600

Q

with

a

line

matching

transformer,

and

greater

than

30

kQ

with

a

tape

preamplifier.

Equivalent

Input

Noise:

«-120

dBr

with

a

low

impedance

microphone

preamplifier.

Output

Noise:

«-85

dBm

(with

all

controls

off).

The

mixer/power

amplifier

shall

be

rack

mountable

and

finished

in

black.

The

amplifier's

dimensions

shall

be

514"

(H)

x

19"

(W)

x

12%"

(D)

and

its

net

weight

shall

be

24.2

lbs.

(1707C),

or

30.8

lbs.

(1715C).

The

plug-in

accessory

modules

shall

be

the

1780A/AT

and

the

1781A/AT

Input

modules

and

the

1783

Line

Output

module.

The

accessory

transformers

usable

with

the

modules

shall

be

the

1785A

Input

Isolation

transformer

and

the

1786

Output

Isolation

transform-

er.

The

connector

subassemblies

shall

be

the

1791

female

XLR,

1792

male

XLR,

1793

dual

phono,

and

the

1794

5-lug

screw

terminal

connector.

The

mixer/power

amplifier

shall

be

the

Altec

Lansing

Model

1707C/1715C.

ALTEC

LANSING

a

MARK

IV

company

P.O.

BOX

26105

e

OKLAHOMA

CITY,

OK

73126-0105

e

U.S.A.

e

405/324-5311

or

FAX:

405/324-8981

©

1992

ALTEC

LANSING

CORPORATION

PRINTED

IN

U.S.A.

7/92

Revision

1

42-07-029244

ALTEC

the

sound

of

experience

1707C

&

1715C

Mixer/Power

Amplifiers

Operating

and

Service

Instructions

ALTEC

LANSING

CORPORATION

MA

a

RK

IV

companv

P.O.

Box

26105

e

OKLAHOMA

CITY,

OK

e

73126—0105

e

405—324—5311

or

FAX

405—324—8981

Table

of

Contents

Section

SPECIFICATIONS

ELECTRICAL

CONNECTIONS

FOR

THE

1707C/1715C

MIXER/POWER

AMPLIFIERS

Power

Connections

(120

Volt,

50/60

Hz)

Power

Connections

(100,

200, 220,

or

240

Volt;

50/60

Hz)

INSTALLING

MODULES

IN

THE

MAINFRAME

SHELF

OR

RACK

MOUNTING

THE

1707C/1715C

MIXER/POWER

AMPLIFIERS

Ventilation

CONFIGURING

THE

MAINFRAME

The

Mainframe's

Inner

Workings

Output

Connection

Output

Fuse

Mute/Tone

Generator

Connections

The

Rear-Panel

Output-Level

Control

Resistance

Effects

of

Long-Cable

Runs

on

Mute

—

and

Tone-Generator

Circuits

LINK

IN/LINK

OUT

Connections

PREAMP

OUT/AMP

IN

Connections

AUX

OUT

Connections

Battery

Input

Connections

FRONT/REAR-PANEL

CONTROLS,

SWITCHES,

INDICATORS,

AND

CONNECTORS

INITIAL

SETUP

AND

OPERATION

OF

MAINFRAME

WITH

MODULES

INSTALLED

Initial

Setup

of

an

Input

Module

Initial

Setup

of

an

Output

Module

Initial

Setup

of

the

Mainframe

Operating

the

1707C/1715C

Mixer/Power

Amplifiers

SERVICE

INSTRUCTIONS

SERVICE

INFORMATION

Power

Amplifier

Bias

Adjustment

Power

Amplifier

DC

Offset

Adjustment

Parts

Ordering

Factory

Service

Technical

Assistance

Pants

List

|

List

of

Tables

and

Figures

Table

I.

AC

Line

Voltage

Selection

and

Strapping

Chart

Table

Il.

AC

Fuse

Selection

Chart

Table

lil.

Maximum

Allowable

Cable

Resistances

Figure

1.

Top-Cover

Removal

Figure

2.

Location

of

Voltage

Selection

Terminal

Block

Figure

3.

Application

of

International

Stickers

Figure

4.

Module

Installation

Figure

5.

Removal

of

Blank

Cover

Panel

Figure

6.

System

Configuation

Label

Figure

7.

Block

Diagram

of

1707C/1715C

Mixer/Power

Amplifiers

Figure

8.

Direct

Output

Connections

Figure

9.

Transformer

Output

Connections

Figure

10.

Mute/Tone

Generator

Switch

Connections

Figure

11.

Typical

Linking

Connections

Figure

12.

Patching

an

External

Equalizer

or

Other

Signal

Processing

Devices

Figure

13.

Battery

Input

Connections

Figure

14.

Front-Panel

Controls,

Switches,

and

Indicators

for

the

1707C/1715C

Figure

15.

Rear-Panel

Control

and

Connectors

for

the

1707C/1715C

Figure

16.

Schematic

of

the

1707C/1715C

Mainframe

Page

>

B

O0O0MMM

MMMONNDØD

OOM

Oo

OO

000

N

0

000

O

Y

Om

01

Y

—

O

11

Gatefold

Description

The

1707C

and

1715C

Mixer/Power

Amplifiers

offer

a

highly

flexible

integration

of

a

user

configurable

six

input

mixer

with

a

fully

protected

power

amplifier

in

one

con-

venient

cost

effective

package.

The

six

input

ports

accept

any

of

the

several

input

modules

or

output

module.

The

programmable

input

modules

may

have

their

muting

circuitry

configured

in

either

"priority",

"slave"

mode,

or

may

be

set

to

ignore

muting

commands.

When

a

module

configured

in

the

"Priority"

mode

is

activated,

modules

in

the

"slave"

mode

will

be

muted.

Circuitry

is

also

provided

to

allow

remote

volume

control

of

individual

inputs.

Multiple

mainframes

may

be

dynamically

linked

together.

Separate

preamp-out

and

amplifier-in

jacks

allow

the

insertion

of

equalizers

or

other

signal

processing

between

the

mixer

and

the

power

amplifier.

A

multi-tone

generator

and

a

compressor/limiter

are

also

provided.

Continuous

Average

Power:

1707C:

1715C:

Maximum

Midband

Output

Power:

1707C:

1715C:

Power

Bandwidth:

Direct

Output:

Transformer

Output:

Frequency

Response:

Direct

Output:

Transformer

Output:

Link

Output:

Preamp

Output:

Specifications

Input

Sensitivity

/

Input

Impedance:

75

watts

150

watts

(Reference

1

kHz

at

196

THD)

100

watts

175

watts

(Ref.

1

kHz

at

rated

output

power)

better

than

20

Hz

—

20

kHz

better

than

50

Hz

—

15

kHz

+1

dB,

20

Hz

—

20

kHz

(Ref.

1

kHz,

1

watt

output)

+1.5

dB,

50

Hz

—

15

kHz

(Ref.

1

kHz,

1

watt

output)

+1dB,

20

Hz

—

20

kHz

(Ref.

1

kHz,

100

mVrms,

10

kQ

load)

+1dB,

20

Hz

—

20

kHz

(Ref.

1

kHz,

0

dBm

output,

600

(2)

load)

Total

Harmonic

Distortion

(THD):

Direct

Output:

Transformer

Output:

Link

Output:

Preamp

Output:

Intermodulation

Distortion:

Direct

Output:

<0.05%,

20

Hz

—

20

kHz

(Ref.

1

kHz,

rated

output

power,

30

kHz

low-pass

filter)

<1.0%,

50

—

100

Hz

<0.1%,

100

Hz

—

20

kHz

(Ref.

1

kHz,

rated

output

power,

30

kHz

low-pass

filter)

<0.05%,

20

Hz

—

20

kHz

(Ref.

1

kHz,

100

mVrms

output,

10

kQ

load,

30

kHz

low-pass

filter)

<0.05%,

20

Hz

—

20

kHz

(Ref.

1

kHz,

0

dBm

output,

600

©

load,

EQ

flat,

compressor/limiter

off,

30

kHz

low-pass

filter)

(SMPTE

4:1)

less

than

0.1%

at

rated

power)

Input

Sensitivity

/

Input

Impedance:

(For

rated

output

power,

Ref.

1

kHz,

0

dBu

=

0.775

Vrms)

Using

1780A/1780AT:

(balanced,

no

pad)

Using

1780A/1780AT:

(balanced,

w/pad)

Using

1781A:

(balanced)

Using

1781AT:

(balanced)

Using

1781A+

1785A:

(balanced)

0.3

to

100

mVrms

/

10

KQO

(-68

dBu

to

-18

dBu)

3

mVrms

to

1

Vrms

/

10

kQ

(-48

dBu

to

+2

dBu)

0.3

to

100

mVrms

/

10

KQO

(-68

dBu

to

-18

dBu)

0.1

to

30

mVrms

/

600

2

(-78

dBu

to

-28

dBu)

0.1

to

30

mVrms

/

6000

(-78

dBu

to

-28

dBu)

Link

Input:

(unbalanced)

Amplifier

Input:

(unbalanced)

Rated

Output

Level

/

Minimum

Load

Impedance:

Link

Output

(unbal):

Preamp

Output

(unbal):

Auxiliarv

Output

(unbal):

Direct

Output:

1707C:

1715C:

Transformer

Output:

1707C:

1715C:

Damping

Factor:

Direct

Output:

Signal-to-Noise

Ratio:

Direct

Output:

(master

at

minimum)

Direct

Output:

(master

at

maximum)

Link

Output:

Preamp

Output:

Protection

Systems:

Amplifter:

Load:

External

DC

Supply:

Mainframe:

Equalization:

Bass:

Treble:

100

mVrms

/

10

kN

(-18

dBu)

0.775

Vrms

/

10

kQ

(0

dBu)

(Reference

1

kHz)

100

mVrms

(-18

dBu),

2

kQ

0

dBm,

600

(2

min.

load

0

dBm,

600

(2

min.

load

Unbalanced

24.5

Vrms

/

8

()

min.

load

24.5

Vrms

/

4

Q

min.

load

Balanced

17.4

Vrms

/

4.0

Q

min

load

25.0

Vrms

/

8.3

0

min

load

70.7

Vrms

/

66.62

min

load

25.0

Vrms

/

4.2

Q

min

load

34.6

Vrms

/

8.0

Q

min

load

70.7

Vrms

/

33.3()

min

load

>40,

20

Hz

—

I

kHz

>

105

dB

below

rated

output

power,

À

weighted.

>80

dB

below

rated

output

power,

Å

weighted.

>75

dB

below

100

mVrms

output,

À

weighted.

>75

dB

below

0.775

Vrms

output,

A

weighted,

EQ

defeated,

compressor

/

limiter

off.

e

Short

circuit

current

limiting.

€

Over

voltage

limiting.

€

Thermal

Sensing.

e

Spurious

oscillatory

protection.

e

Low

AC

line

sensing.

e

Output

DC

detection.

e

Subsonic

detection.

e

Tum-on/tum-off

transients.

(approx

3

seconds)

e

DC

input

fuses.

e

AC

line

fuse.

Shelving

Tvpe.

+12

dB

at

100

Hz.

+12

dB

at

10

kHz.

Note:

0

dBm

into

600

(2

vields

0.775

Vrms.

Compressor

/

Limiter:

Threshold:

Compression

Ratio:

Release

Time:

Tone

Generator:

Tones:

Control:

Level

adjustment:

Connectors:

Inputs:

Amplifier

Input:

Link

input:

Batterv:

Outputs:

Amplifier

Output:

Preamp

Output:

Link

Output:

Auxiliary

Input:

Control:

Mute

and

Tone

Generator:

Controls:

Front

Panel:

Input:

Compressor/Limiter:

EQ

Controls:

Output:

Miscellaneous:

Rear

Panel:

Tone

Generator:

Indicators:

Front

Panel:

Microphone

Phantom

Power:

Power

Requirements:

AC

Mains:

1707C:

1715C:

Feedforward

Topology

-20

dB

to

+20

dB

Continuously

variable.

(Ref.

100

mVrms

on

Link

input.)

1:1

to

o:1,

Continuously

variable.

50

msec

to

5

sec.

Continuously

variable.

Electronically

produced

Buzzer,

siren,

single-tone

chime,

and

repeating

tone

chime.

All

tones

are

initiated

by

remote

switch

closures.

Rear

panel.

l

—

RCA

phono

receptacle

I

—

RCA

phono

receptacle

3-terminal

barrier

strip

7-terminal

barrier

strip

I

—

RCA

phono

receptacle

1

—

RCA

phono

receptacle

1

—

RCA

phono

receptacle

Screw

Terminals

(7)

6

Input

Level

adjust

I

Release

Time

adjust

(screwdriver

slotted)

I

Threshold

adjust

(screwdriver

slotted)

I

Compression

Ratio

adjust

(screwdriver

slotted)

1

On/Off

Switch

]

Bass

adjust

1

Treble

adjust

1

EQ

In/Defeat

switch

I

Master

Level

adjust

1

AC

Power

switch

1

Output

Level

adjust

(screwdriver

slotted)

6

Green

LED's,

(Nominal

Input

Level)

6

Red

LED's,

(Peak

Input

Level)

1

Red

LED,

Main

power

output

CLIP)

I

AC

Power

ON

48

VDC

@

200

milliamps

consumption

(Ref.

1

kHz,

rated

output

with

no

modules

installed

100,

120,

200,

220

or

240

VAC.

165

watts

maximum.

100,

120,

200,

220

or

240

VAC.

320

watts

maximum.

Power

Requirements:

Battery:

1707C:

1715C:

Power

Consumption

and

Heat

Produced:

1707C:

75

watts

output:

25

watts

output:

1715C:

150

watts

output:

50

watts

output:

Operating

Temperature

Range:

Dimensions:

Width:

Height:

Depth:

Net

Weight:

1707C:

1715C:

Finish

Color:

Included

Accessories:

4

—

Operating/Service

Instruction

documents.

One

each

for

the

Mainframe,

1780A/AT,

1781

A/AT,

and

1783.

+48

VDC

bipolar,

1.5

amps

maximum.

+48

VDC

bipolar,

3.0

amps

maximum.

165

watts

consumed.

306

BTU/hour.

130

watts

consumed.

357

BTU/hour.

320

watts

consumed.

578

BTU/hour.

230

watts

consumed.

612

BTU/hour.

Up

to

50?C

(1227F)

19

inches

(48.3

cm)

5/4

inches

(13.3

cm)

3

standard

rack

units.

13

inches

(33.0

cm)

25

Ibs.

(11.4

kg)

32

Ibs.

(14.5

kg)

Black

1

—

Shorting

Bar

(Installed

on

Direct

Output

to

OT

in).

I

—

"U"

Shorting

Bar

(Installed

on

Preamp

Out

to

Amp

In).

4

—

Rubber

Feet

(installed).

I

—

System

Configuration

Label

installed

on

top

cover.

1

—

International

fuse.

]

—

International

220/240

VAC

voltage

sticker.

|

—

International

Fuse

sticker.

1

—

Rack

mount

hardware

kit.

Optional

Input

Output

Accessory

Modules:

1780A

Mic/Line

Input

Module.

1780AT

Mic/Line

Input

Module

with

10

kQ

bridging

transformer

installed.

1781A

Programmable

Input

Module.

1781AT

Programmable

Input

Module

with

1785A

600

2

to

10

kN

isolation

transformer

installed.

1783

Line

Output

Module.

1785A

600

€

to

10

kQ

Input

Isolation

Transformer.

1786

600

(2

to

600

(2

Output

Isolation

Transformer.

1791

Female

XLR

Connector.

1792

Male

XLR

Connector.

1793

Dual

RCA

Phono

Connector.

1794

5—Lug

Screw

Terminals.

8751A

Programmable

14

Band

EQ

Module.

Altec

Lansing

continually

strives

to

improve

their

products

and

performance.

Therefore,

specifications

are

subject

to

change

without

notice.

4