Monoprice 14890 User Manual

SAFETY WARNINGS AND GUIDELINES

 Turn off and unplug all equipment prior to making electrical connections, including

speaker wire connections.

 Reduce the volume level prior to making any change to the audio input source, e.g.,

changing radio stations or changing CDs.

 When using this speaker as part of a constant voltage speaker system, ensure that

the amplifier power is at least 20% higher than the total power settings of the

connected speakers.

 Most speaker damage is caused by clipping, which is heard as distortion. If you hear

distortion, reduce the volume level until the audio is no longer distorted.

 Take care to ensure that the speaker wire connections are properly polarized.

Inverted polarization can result in unnatural or attenuated sound, especially in the

bass frequencies.

 Do not use chemical cleaners or solvents to clean this speaker. Use only a soft, dry

cloth. Moisten the cloth with warm water for particularly stubborn deposits.

 The speaker has a steel safety wire with a loop running through the wire bundle.

Ensure that the safety wire is securely attached to a truss or beam inside the ceiling,

which is capable of supporting the weight of the speaker.

INTRODUCTION

Thank you for purchasing this Pendant Speaker!

This public address speaker is designed to be suspended from a ceiling in a manner similar

to a suspended light fixture. It features a built-in step-down transformer with three taps,

allowing it to be used as part of a 70V or 100V constant voltage speaker array.

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FEATURES

 Built-in step-down transformer with three taps for use in a 70V or 100V constant

voltage speaker array

 6-inch main driver
 150Hz ~ 14kHz frequency response
 92dB sound pressure level
 Steel safety wire supports the weight of the speaker

PACKAGE CONTENTS

1x Pendant speaker

1x User's manual

CONSTANT VOLTAGE VS 8-OHM SPEAKER SYSTEMS

A constant voltage speaker system differs from a traditional 8-ohm speaker system in that

it uses a step-up transformer at the audio source to raise the voltage and lower the current

on the transmission line. At the speaker end, a step-down transformer converts the signal

back to a normal speaker level voltage. This reduces power loss during transmission, which

allows for the use of longer speaker wire runs using smaller gauge wire.

Additionally, a constant voltage speaker system allows for the use of multiple speakers on

each channel, without the need for complicated impedance calculations and

configurations. In a constant voltage system, all speakers on a given channel are connected

in parallel and the complicated impedance calculations are replaced by simple wattage

calculations.

For example, if you want to connect two speakers per channel in a traditional 8-ohm

speaker system, you must either connect them in series, which results in an overall 16-ohm

impedance, or in parallel, which results in an overall 4-ohm impedance. In the first case, the

16-ohms impedance effectively halves the output power of your amplifier, resulting in

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