Altec Lansing 1707C User Manual

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.

Altec Lansing 1707C Specifications

General

Brand	Altec Lansing
Model	1707C
Category	Amplifier
Language	English

Summary

System Specifications

Frequency Response

Specifications for frequency response of direct and preamp outputs.

Total Harmonic Distortion (THD)

Specifications for THD of direct and preamp outputs.

Signal-to-Noise Ratio

Specifications for signal-to-noise ratio of direct and preamp outputs.

Detailed System Specifications

Power Output and Bandwidth

Continuous average, midband output power, and frequency bandwidth.

Distortion and Damping Factor

Intermodulation distortion and damping factor specifications.

Output Levels and Transformer Specs

Rated output levels for direct, preamp, and transformer outputs.

Equalization, Compressor/Limiter, and Tone Generator

Details on EQ, compressor/limiter functions, and tone generator features.

Power, Consumption, and Environmental Specs

Power requirements, consumption, temperature, dimensions, and weight.

System Block Diagram and Design Specs

Architect's and Engineer's Specification

Technical specifications for system design and installation.

Mainframe Overview and Specs

Specifications

Detailed technical specifications for the mainframe.

Mainframe Technical Details

Compressor/Limiter Details

Details on compressor/limiter threshold, ratio, and release time.

Tone Generator Functions

Power Requirements

Electrical Connections and Power

Power Connections (120 Volt, 50/60 Hz)

Power Connections (100, 200, 220, or 240 Volt; 50/60 Hz)

AC Line Voltage Selection and Strapping Chart

AC Fuse Selection Chart

Module Installation and Mounting

Installing Modules in the Mainframe

Shelf or Rack Mounting

Ventilation

Mainframe Configuration

Mainframe's Inner Workings

Signal Routing and Connectivity

Mute/Tone Generator Connections

LINK IN/LINK OUT Connections

PREAMP OUT/AMP IN Connections

Front Panel Controls and Setup

Front-Panel Controls, Switches, and Indicators

Initial Setup of an Input Module

Initial Setup of an Output Module

Initial Setup of the Mainframe

Mixer/Power Amplifier Operation

Rear-Panel Control and Connectors

Operating the 1707C/1715C Mixer/Power Amplifiers

Procedure for setting levels, filters, and compressor/limiter.

Service Instructions

Caution on Servicing

Warning regarding hazardous voltages and user-serviceable parts.

Service, Parts, and Support

Service Information

Power Amplifier Bias Adjustment

Procedure for adjusting amplifier bias current.

Power Amplifier DC Offset Adjustment

Procedure for adjusting amplifier DC offset.

Parts Ordering

Factory Service

Technical Assistance

Schematic Diagram

Schematic

The main schematic diagram of the mixer/power amplifier.