Monoprice 14887 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.

INTRODUCTION

Thank you for purchasing this Coaxial In-Ceiling Speaker!

This 2-way speaker features a built-in step-down transformer, allowing it to be used as part

of a 70V or 100V constant voltage speaker array with four (100V) or five (70V) taps. It can

also be configured as a conventional 8-ohm speaker for use in a standard home theater

audio system. The speaker has a preinstalled back can, which helps deliver superior audio

quality.

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FEATURES

 8 ohms nominal impedance
 Compatible with 70V and 100V constant voltage speaker systems
 Built-in step-down transformer with 4 (100V) or 5 (70V) taps
 Preinstalled back can for superior audio quality

PACKAGE CONTENTS

Please take an inventory of the package contents to ensure you have all the items listed

below.

1x Coaxial in-ceiling speaker

1x Grille removal tool

1x Cutout template

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

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