Monoprice MONOLITH 33306 Manuale utente

Monolith™9X Multi-Channel Power Amplifier

Model 33306

User's Manual

CONTENTS

SAFETY WARNINGS AND GUIDELINES.......................................................................................................................................3

INTRODUCTION................................................................................................................................................................................................4

FEATURES..............................................................................................................................................................................................................4

CUSTOMER SERVICE....................................................................................................................................................................................5

PACKAGE CONTENTS.................................................................................................................................................................................5

PRODUCT OVERVIEW.................................................................................................................................................................................6

CABLE PREPARATION................................................................................................................................................................................. 7

Speaker Wires............................................................................................................................................................................................. 7

RCA or XLR Cables ..................................................................................................................................................................................8

Trigger Cables .............................................................................................................................................................................................8

REMOTE POWER ON....................................................................................................................................................................................8

INSTALLATION..................................................................................................................................................................................................9

MAIN CIRCUIT BREAKER ........................................................................................................................................................................10

PROTECTION CIRCUITRY........................................................................................................................................................................10

TROUBLESHOOTING ...................................................................................................................................................................................11

TECHNICAL SUPPORT................................................................................................................................................................................11

SPECIFICATIONS............................................................................................................................................................................................12

REGULATORY COMPLIANCE.............................................................................................................................................................. 13

Notice for FCC .......................................................................................................................................................................................... 13

Notice for Industry Canada...........................................................................................................................................................14

SAFETY WARNINGS AND GUIDELINES

This device is intended for indoor use only.

Do not expose this device to water or moisture of any kind. Do not place drinks or

other containers with moisture on or near the device. If moisture does get in or on

the device, immediately unplug it from the power outlet and allow it to fully dry

before reapplying power.

Do not touch the device, the power cord, or any other connected cables with wet

hands.

Do not expose this device to excessively high temperatures. Do not place it in, on,

or near a heat source, such as a fireplace, stove, radiator, etc. Do not leave it in

direct sunlight.

This device ventilates excessive heat through the slots and openings in the case. Do

not block or cover these openings. Ensure that the device is in an open area where

it can get sufficient airflow to keep from overheating.

Do not place or install this device in an area where it can be exposed to excessive

amounts of dust, humidity, oil, smoke, or combustible vapors.

Prior to operation, check the unit and power cord for physical damage. Do not use if

physical damage has occurred.

Take care to prevent damage to the power cord. Do not allow it to become

crimped, pinched, walked on, or become tangled with other cords. Ensure that the

power cord does not present a tripping hazard.

Before plugging the unit into a power outlet, ensure that the outlet provides the

same type and level of power required by the device.

This device uses a grounded power cord and requires a ground connection for safe

operation. Ensure that the power source has a proper ground connection. Do not

modify the plug or use a "cheater" plug to bypass the ground connection.

Ensure that power is turned off and disconnected before making any electrical

connections.

Do not plug this device into the switched output of a preamplifier or other audio

component. This amplifier requires higher current levels than these devices are

designed to handle.

Unplug this device from the power source when not in use.

Never unplug the unit by pulling on the power cord. Always grasp the connector

head or adapter body.

Clean using a soft, dry cloth only. Do not use chemical cleaners, solvents, or

detergents. For stubborn deposits, moisten the cloth with warm water.

This device has no user serviceable parts. Do not attempt to open, service, or

modify this device.

INTRODUCTION

Thank you for purchasing this Monolith Multi-Channel Power Amplifier!

This power amplifier features nine independent channels, three of which deliver 200 watts

and six of which deliver 100 watts of power into 8 ohm loads. A trigger input jack allows for

remote power on/power off when a source device is powered on. Each channel features an

optically coupled protection circuit, to prevent damage to the amplifier or speakers.

FEATURES

Three 200-watt and six 100-watt amplifier modules

Full rated power at 8 ohm loads

Rated for 4 ~ 16 ohm loads

20Hz ~ 20kHz ±0.1dB frequency response

Gold plated RCA input and speaker output connectors

Remote power-on trigger option

Optically coupled short circuit protection

CUSTOMER SERVICE

The Monoprice Customer Service department is dedicated to ensuring that your ordering,

purchasing, and delivery experience is second to none. If you have any problem with your

order, please give us an opportunity to make it right. You can contact a Monoprice

Customer Service representative through the Live Chat link on our website

www.monoprice.com during normal business hours (Mon-Fri: 5am-7pm PT, Sat-Sun: 9am-

6pm PT) or via email at [email protected]

PACKAGE CONTENTS

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

below. If anything is missing or damaged, please contact Monoprice Customer Service for a

replacement.

1x Monolith 9x multi-channel power amplifier

1x AC power cord (NEMA 5-15 to IEC 60320 C19)

1x User's manual

PRODUCT OVERVIEW

INPUTS: XLR and RCA line-level inputs for connection to the preamplifier outputs on a

dedicated preamplifier or AV receiver. The XLR/RCA switches switch between the

XLR and RCA inputs. You can use a mix of XLR and RCA inputs.

OUTPUTS: Paired 5-way binding posts for connecting the speakers.

TRIGGER INPUT: 3.5mm TS jack for connection to the trigger output of a source device. The

presence of voltage on this input will cause the amplifier to power on. The amplifier

will automatically power down into standby mode after the trigger signal has been

removed.

GND: Chassis ground. While a grounding wire is rarely needed, occasionally there is a hum

issue when components are interconnected. This can be remedied by tying their

chassis grounds together.

CIRCUIT BREAKER: The switch is used to apply or remove power to the amplifier. By

contrast, the Power switch on the front panel is used to switch the amplifier

between standby mode and full power on.

POWER INPUT: The IEC 60320 C20 panel connector connects to the included high-current

AC power cable.

POWER SWITCH (Front Panel, not pictured): Switches the amplifier between standby mode

and full power on.

CABLE PREPARATION

You will need several cables for this installation. None of the cables or connectors

mentioned in this section are included with the system.

Important Safety Note! If you plan on running any of these cables through the walls,

through a connecting floor, or inside an air duct, they should be rated for In-Wall, Riser

(between floors), or Plenum (air duct) use in commercial installations. For residential

installations, an In-Wall rating is sufficient for all circumstances. Using unrated or

improperly rated cables could accelerate the spread of any fire and could nullify insurance

claims.

Speaker Wires

You will need speaker wires to connect each speaker to the amplifier. The size (AWG) of

wire you choose depends on the distance from the amplifier to the speakers, the speaker

impedance, and the physical limits of the terminals at each end.

Other than saving a few pennies of cost or grams of weight per foot, there is no reason to

use anything other than the thickest wire possible. This amplifier uses 5-way binding post

connectors, which can accept bare wire, spade lugs, banana plugs, and pin plugs. For

anything other than extremely short speaker wire runs, you should use at least 14AWG

wire, but preferably 12AWG or 10AWG, depending on which gauges your speakers can

accept.

Whichever speaker wire you get, make sure that it has marks to identify one conductor

from another. Most speaker wire uses a colored stripe to identify one of the conductors.

The identified conductor is usually used for the positive (+/red) connection and the other

for the negative (-/black) side.

Note: When cutting speaker wire, ensure that the length of each wire is the same. This

ensures that the overall impedance of each channel is identical. If there is any excess

speaker wire, it should not be coiled, as it could create an antenna to receive stray radio

signals. Instead, snake the excess wire back and forth.

RCA or XLR Cables

You will need RCA or XLR cables to connect the preamp outputs on your preamplifier to

the inputs on this amplifier. In most cases, ordinary RCA cables are sufficient. However, if

there is a significant distance between the amplifier and the preamplifier, it is

recommended to use RCA cables manufactured using shielded RG6 or RG59 cable. For long

distance cable runs, balanced XLR cables are highly recommended.

Trigger Cables

This amplifier features a low voltage trigger input, which can switch the amplifier from

standby mode into full power on mode whenever the trigger signal is detected. The trigger

signal consists of a low-current, low-voltage signal (between 3.3 and 24 VDC) applied to

the input, which is carried between components with a cable that terminates in a 3.5mm

TS plug.

REMOTE POWER ON

This amplifier features a trigger input, which is used to switch the amplifier between

standby mode and full power on mode. The input is a 3.5mm TS jack that accepts a voltage

level from 3.3 to 24 VDC. Some source devices feature a trigger output, which can be used

to trigger the amp.

If your source device does not contain a trigger output, but does have a switched AC

outlet, you can obtain a trigger adapter, which consists of an AC adapter with a 3.5mm TS

plug on the end of the cord. This adapter can then provide the necessary trigger signal

whenever the component it is plugged into is turned on.

To use the amplifier with remote power on, the Circuit Breaker switch on the rear panel

should be in the ON position and the Power switch on the front panel in the Standby

position.

To override the remote power on feature or to use the amp without it, simply use the

Power switch on the front panel to turn the amp on and off (standby).

INSTALLATION

Perform the following steps to install this amplifier into an audio system.

1. Power off and unplug all equipment that will be connected to this amplifier.

2. Prepare lengths of speaker wire (not included) to connect each of the output

channels to its respective speaker.

3. Using a two-conductor speaker wire, connect one end to the input terminals on the

speaker, then connect the other end to the Output terminals on the amplifier. Take

care to maintain polarity with positive to positive and negative to negative.

4. Repeat step 3 for each of the other speakers.

5. Using a single XLR or RCA interconnect cable (not included), plug one end into the

Input on the amplifier, then plug the other end into the preamplifier output of the

same name.

Example: Connect the Center channel input on the amplifier to the Center channel

output on the preamplifier.

6. Repeat step 5 for each of the other channels.

7. For each channel, set the XLR/RCA switch to the appropriate position, depending

on which type of cable is used.

8. (Optional) Using a two-conductor 3.5mm TS cable (not included), plug one end into

the Trigger Input on the amplifier, then plug the other end into the trigger output

on your source device.

9. Ensure that the Circuit Breaker switch is in the OFF position and that the Power

switch on the front panel is in the Standby position.

10. Using the included AC power cable, plug the C19 connector on the cable into the

C20 panel connector on the amplifier, then plug the other end into a nearby AC

power source.

Warning! Do not plug the amplifier into a switched outlet on a preamplifier or other

audio component. The amplifier should be plugged directly into an AC wall outlet.

11. Ensure that the volume on the preamplifier is set to the minimum level.

12. Power on all equipment connected to the amplifier, then flip the Circuit Breaker on

the amp to the ON position. The power button LED will blink until the circuitry is

properly warmed up. Once the LED stops blinking and illuminates steadily, the

amplifier has finished the start-up process and is ready for operation.

Note: It is recommended to always turn the amplifier on last and to turn it off first

whenever powering your audio system on or off. This ensures that any pops or

transient spikes, which could cause damage to the delicate speaker coils, are not

sent to your speakers.

Congratulations, your amplifier is connected and ready for use!

MAIN CIRCUIT BREAKER

The Circuit Breaker switch on the rear panel doubles as a master power switch. If the circuit

breaker trips into the off position, try flipping it back on. If it immediately trips back off,

unplug the amplifier from the power source and have it serviced.

PROTECTION CIRCUITRY

If the amplifier senses a short on one of the speaker wires the built-in protection circuit will

cut off audio output. The circuit will continue to monitor the line and will stay cut off as

long as the short continues to exist. If this occurs, inspect the speaker wire connections at

each end and fix any shorts that exist. Once the short is repaired, the amplifier will

continue to operate as normal.

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