Audio Authority 1805 User manual

User Manual

Model 1805

2 Channel Amplier

Introduction

The Audio Authority® 1805 is a compact amplier designed to provide amplication

for speakers in retail demonstrations. Volume may be controlled via RS-232 or

RS-485 using custom control devices such as a touch screen or capacitive touch

panel. For best results use a commercial grade analog media player such as the

Model 1703.

Package Contents

Before installing this product, please check the packaging and make certain the

following items are contained in the shipping carton:

• 1805 Amplier

• DC Power Adaptor

Features

• Up to 30 watts per channel power output using a 24V power supply

• Volume may be controlled by RS-232 or RS-485

• Gain adjustment per channel

• Small footprint for easy placement in displays and xtures

MODEL 1805

701-1525

12V - 24V

POWER

Model 1805

2 Channel Amplier

1/2

800-322-8346 • 859-233-4599 • audioauthority.com/1805

+ –

RS-232

COM BUS

RS-485

RS-232

OUT

RIGHT SPEAKERLEFT SPEAKER

AUDIO

INPUT

DEFAULT

VOLUME

OUTPUT + –

DEFAULT

VOLUME

OUTPUT

2/2

POWER INPUT

LEFT CHANNEL

GAIN

LEFT SPEAKER

CONNECTOR

AUDIO INPUT

RS-485 COM BUS

RS-232 IN

RS-232 OUT

RIGHT

CHANNEL GAIN

RIGHT SPEAKER

CONNECTOR

TOP VIEW

Audio Input

Connect an analog audio source to the 3.5mm stereo Audio Input jack. If source

has volume control, raise it to maximum.

RS-232 Ports

The RS-232 ports pass-thru communications to other serial devices at 9600 Baud

rate. Serial commands shown in table below.

NOTE: A special RJ-45 to DB-9 cable is available.

Volume Up Volume Down Discreet Volume Commands

[VOL+] [VOL-] [VOL=0] Min [VOL=128] Max

RS-485 COM Bus

The RS-485 communication pathway is for use with custom applications.

Power

Connect the 12V power supply (included) to the jack marked Power Input. For high

power applications use a 24V power supply.

How to Set the Model 1805 Amplier Gain Controls

• Raise the source volume controls (if present) to maximum.

• Turn the 1805 gain dials (left and right channels) to 1 and start the audio

source playing.

• Select a speaker position, and raise the 1805 gain dials to the point of

distortion, then reduce to the desired maximum level. Check all of the

connected speakers for distortion, readjust 1805 gain levels if necessary.

LEFT CHANNEL GAIN RIGHT CHANNEL GAIN

LEFT SPEAKER

CONNECTOR

RIGHT SPEAKER

CONNECTOR

3.5MM AUDIO

INPUT

RS-232 INPUT RS-485 BUS

RS-485 BUS POWER INPUTRS-232 OUTPUT

752-718

Rev. 20170512

2048 Mercer Road, Lexington, KY 40511-1071 USA

800-322-8346 • 859-233-4599 • Fax: 859-233-4510

support@audioauthority.com • www.audioauthority.com

Power Specications

Measurements with an 8 ohm load, both channels driven:

12V THD Watts per channel

Power Supply

PN:571-043

1% 8.5

10% 10.5

Frequency response at 8.5W per channel: +/- 1.452 dB 20Hz-20kHz

24V THD Watts per channel

Power Supply

(Call for part number.)

1% 30

10% 36

Frequency response at 30W per channel: +/- 0.736 dB 20Hz-20kHz

Installation

• Attach the player to a at surface with the screws provided.

• Allow adequate ventilation for amplier.

• Connect speaker terminals securely.

• Connect 3.5mm stereo cable from source.

• Connect power supply to AC power, then to the power port.

• Adjust gain (see page 3).

• Call Audio Authority with questions that are not addressed in this manual.

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