McIntosh MA6900 Owner's Manual download pdf (Page 4)

Performance Features

Introduction and Performance Features

Introduction

· Power Output

The MA6900 consists of two separate power amplifier

channels, each capable of 200 watts into 2, 4 or 8 ohm

speakers with less than 0.005% distortion.

· Electronic Input Switching

Digital Logic integrated circuits drive Electromagnetic

Switches on all six inputs and operating functions for reli-

able, noiseless, distortion free switching.

· Power Guard

Both channels include the patented McIntosh Power Guard

circuit that prevents the amplifier from being overdriven

into clipping, with its harsh distorted sound that can also

damage your valuable loudspeakers.

· Sentry Monitor and Thermal Protection

McIntosh Sentry Monitor power output stage protection

circuits ensure the MA6900 will have a long and trouble

free operating life. Built-in Thermal Protection Circuits

guard against overheating.

· Patented Autoformers

McIntosh designed and manufactured Output Autoformers

provide an ideal match between the amplifier output stages

and speaker loads of 2, 4 and 8 ohms. The Autoformers

also provide perfect DC protection for your valuable loud-

speakers.

· Illuminated Power Meters

The Illuminated Power Output Meters on the MA6900 are

peak responding, and indicate the power output of the am-

plifier.

Now you can take advantage of traditional McIntosh stan-

dards of excellence in the MA6900 Integrated Amplifier.

Two 200 watt high current output channels will drive any

high quality loudspeaker system to its ultimate perfor-

mance and the flexible Preamplifier Selection provides for

hookup and control of various input sources. The MA6900

reproduction is sonically transparent and absolutely accu-

rate. The McIntosh Sound is The Sound of the Music It-

self.

Table of Contents

Safety Instructions ............................................................ 2

Thank You and Please Take a Moment............................. 3

Technical Assistance and Customer Service .................... 3

Table of Contents and General Notes ............................... 4

Introduction ...................................................................... 4

Performance Features ....................................................... 4

Dimensions ....................................................................... 5

Installation ........................................................................ 6

Rear Panel Connections and Switch ................................. 7

How to Connect for Loudspeakers ................................... 8

How to Connect for Audio and Data Control ................... 9

How to Connect for Video .............................................. 10

How to Connect for a Second Room .............................. 11

Front Panel Controls, Display, Indicator Push-Button

and Switch ...................................................................... 12

How to Operate ............................................................... 13

Remote Control Push-Buttons ........................................ 16

How to Operate by Remote Control ............................... 17

Technical Description ..................................................... 18

Specifications ................................................................. 22

Packing Instruction ......................................................... 23

General Notes

1. The following parts are available from the McIntosh Parts

Department:

Power Control Cable Part No. 170-202

Six foot, 2 conductor shielded, with two 1/8 inch stereo

mini phone plugs.

Jumper Plugs Part No. 117-781

RCA Phono Jumpers, 14mm center spacing.

2. For additional connection information, refer to the owners

manual(s) for any component(s) connected to the MA6900.

3. The MA6900 mutes the speaker outputs for approximately two

seconds when first turned on.

4. It is very important that loudspeaker cables of adequate size

be used, so that there will be no power loss. The size is

specified in Gauge Numbers or AWG (American Wire Gauge).

The smaller the Gauge number, the larger the wire size:

If your loudspeaker cables are 50 feet (38.1m) or less,

use at least 14 Gauge.

If your loudspeaker cables are 100 feet (76.2m) or less,

use at least 12 Gauge.

5. Pin configuration for the XLR Balanced Input connectors on

the MA6900: PIN 1: Shield or ground

PIN 2: + input

PIN 3: - input

6. In the event that the MA6900 over heats, due to improper

ventilation and/or high ambient temperature, the protection

circuits will activate. The Front Panel Power Guard LEDs

will continuously indicate ON and the audio will be muted.

When the MA6900 has returned to a safe operating

temperature, normal operation will resume.

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