Audio Authority 1805 Manual de usuario

User Manual

Model 1805

Variable Gain 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. Gain may be set per channel. For best results use a commercial grade

media player such as the Model 1803 or a BrightSign® player.

Features

• Up to 10.5 watts per channel power output

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

• Gain adjustment per channel

• Small footprint for easy placement in displays and xtures

Audio Input

Connect an analog audio source to the 3.5mm

stereo Audio Input jack. If source has volume

control, raise it to maximum.

POWER

INPUT

INDICATORS:

POWER

STATUS

GAIN TERMINAL

LEFT SPEAKER

GAIN TERMINAL

RIGHT SPEAKER

AUDIO

INPUT

RS-485

COM BUS

RS-232

NULL

RS-232

STRAIGHT

3.5MM AUDIO JACK

RS-232 Ports

The RS-232 ports receive and pass-thru communications to other serial devices at

9600 Baud rate. A variety of RJ-45 serial cable adapters are available from

Audio Authority. Serial commands shown in table below.

Volume Up Volume Down Discreet Volume Commands

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

RS-485 Bus

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

TouchSelect control panels and BrightSign® media players.

Power

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

Indicators

The green Power LED provides visual indication of the amplier’s

on/off state. The yellow Status LED indicates when the input is

over-driven or when the speaker outputs have a short.

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

RS-232 NULL RS-485 BUS

RS-485 BUSRS-232 STRAIGHT

GREEN POWER AND

YELLOW STATUS

752-718B

Rev. 20180904

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

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.

Example System:

The 1805 sends amplied audio to the Model 1819 switch modules that route audio to the speakers.

The 1803 media player’s MicroSD card contains the uncompressed audio content and provides the

low-level input signal for the 1805 amplier. The TS09 controls the demonstration system via RS-485.

1803

1805

1819

TS09 TOUCH PANEL SPEAKERS

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