EarthQuake XJ-300ST User Manual

XJ-300ST

Earthquake Sound Corp. | [phone] | www.earthquakesound.com

User’s Manual

XJ-300ST

2 Channel or Monoblock Class “J” Amplifier

The Sound That Will Move You

®

TRI GGER IN

The Sound That Will Move You

®

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Earthquake Sound Corporation
2727 McCone Avenue
Hayward, CA 94545
Tel: [phone]
Fax: [phone]

Customer Support
[e-mail]
Tel: [phone]
Fax: [phone]

© 2016 Earthquake Sound Corporation. All rights reserved.

This document should not be construed as a commitment on the part of Earthquake
Sound Corporation. The information is subject to change without notice. Earthquake
Sound Corporation assumes no responsibility for errors that may appear within
this document.

Safety Instructions

Safety First

This documentation contains general safety, installation, and operating
instructions for XJ-300ST. It is important to read this user’s manual before
attempting to use these products. Pay particular attention to the safety
instructions.

Symbols Explained:

Note:

Appears on the component to indicate the presence of
uninsulated, dangerous voltage inside the enclosure –
voltage that may be sufficient to constitute a risk of shock.

Calls attention to a procedure, practice, condition or the like
that, if not correctly performed or adhered to, could result in
injury or death.

Calls attention to a procedure, practice, condition or the like
that, if not correctly performed or adhered to, could result in
damage to or destruction of part or all of the product.

Calls attention to information that is essential to highlight.

XJ-300ST Manual 3Specifications are subject to change without notice

Safety Instruction

2) Store this manual and packaging in a safe place.

1) Read these instructions in their entirety.

3) Heed all warnings.

4) Follow instructions (do not take short cuts).

5) Do not use this apparatus near water.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.

8) Do not install near any heat sources such as radiators, heat registers,

stoves, or other apparatuses that produce heat.

9) Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plus has two blades with one wider than the other. A grounding­type plug has two blades and a third grounding prong. The wide blade or
the third prong is provided for your safety. If the provided plug does not
fit into your outlet, consult an electrician for replacement of the obsolete
outlet.

10) Protect the power cord from being walked on or pinched, particularly at

plugs, convenience receptacles, and the pint where they exit from the
apparatus.

11) Only use attachments & accessories specified by the manufacturer.

12) Use only compatible rack or cart for final resting position.

13) Unplug this apparatus during lightening storm or when unused for a long

period of time.

14) Refer all servicing to qualified service personnel. Servicing is required

when the apparatus has been damaged in anyway, such as: power­supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.

15) To reduce the risk of fire or electric shock, do not expose this apparatus

to rain or moisture.

Unpacking System Components

• Keep the original carton and packing materials for future shipment or

storage.

• Check for any visual signs of damage. If you encounter any concealed

damage, consult your Earthquake Sound dealer before proceeding with unit
installation.

• Retain the sales receipt as it establishes the duration of the limited warranty

and provides information for insurance purposes.

System Installation Considerations

There are several factors to consider before installing Earthquake Sound’s
XJ-300ST.

• What are the intended listening zones?

• What system options and accessories might be required for features such

as local sources, etc.?

• From where in each zone will the listener prefer to control the system? Where

will the remote gains be located? Where will the speakers be located?

• Where will the source equipment be located?

Connection Tips

• Keep all power cords away from all signal cables to prevent humming from

induced noise.

• Choose reliable signal cable cords (Earthquake Sound also specializes in

high-performance RCA cables and patches).

• All speaker wires that are ran through the walls should be twisted to reduce

potential hum noise pick up.

• Label both ends of all wires with the corresponding room location.

• It is best to use a grounded electrical outlet to power the amplifier. Lack of

input ground reference could be unsafe. Consult your electrical contractor
about proper grounding.

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Included in the Box

1 XJ-300ST Stereo Class “J” Amplifier
4 Short Mounting Ears

12 Screws for Mounting Ears

1 Back Bracket
4 Screws for the Back Bracket
4 Rubber Feet
1 Power Cord

Introduction

The XJ-300ST amplifier is an extremely versatile and modular amplifier. It can
be used as a two channel, 2.1 channel, or bridged as a 1 channel amplifier.
The XJ-300ST runs completely cool while outputting twice the power of most
amplifiers its size. Therefore, it is extremely flexible and can be used in many
different applications.

Multiple Mounting Options

The XJ-300ST is only one rack space tall and has a half-rack width chassis.
This smart design features a patented interlocking design so two XJ-300STs
can be connected side by side and be rack mountable. Other amplifiers of
the same size run too hot to mount them near anything else which defeats
the purpose of their size. Because the XJ-300STs run completely cool, you
can comfortably mount other components directly above or below them in
the rack. This means ultimate convenience for the installer. There are also
additional mounting holes on the sides of the amplifier so that short brackets
can be attached and the amp can be mounted directly to a wall or inside a
cabinet.

Speaker Set-up Options

One or two XJ-300STs can power a 2.1 channel system. This depends on
how much power you want to output to your speakers. One XJ-300ST can
be used for two speakers while the other can be bridged as a monoblock.
Alternatively, you can use two linked XJ-300STs as a 4 channel system. For
a more high powered system, bridge both of them and designate one speaker
or sub to one amplifier and another speaker or sub for the other. The installer
is completely in charge of how the amplifier’s power is distributed.

Applications

The XJ-300ST has countless applications because of how customizable the
channel set-up is. If you need to install in-ceiling speakers in the kitchen,
tower speakers in the living room, or rock speakers outside, the XJ-300ST
can perform accurately in every situation.

XJ-300ST Manual 5Specifications are subject to change without notice

XJ-300ST

Front Panel Overview

1) Power Switch

Turns the amplifier unit ON or OFF.

2) LED Status Light

This green LED indicates the power status of the amplifier.

3) Signal Sensing Toggle Switch

When set to “AUTO ON”, the amplifier will only turn on whenever signal
(50mV minimum) is present. Once signal is no longer present, the amplifier
will shut off automatically after about 20 minutes. Note that the power switch
must be in the ON position at all times for the AUTO sensing to work.

Set to “+12V TRIG” if the amplifier is being powered by an external source.
The power switch can either be in the ON or OFF position. However, we
suggest keeping the power switch in the OFF position so the amplifier shuts
off once the external source is turned off.

4) Bypass/Lowpass Toggle Switch

Setting the switch to “BYPASS” will turn the crossover control OFF. This
setting is best when using the XJ-300ST in the 2-channel or 2.1
configuration.

Setting it to “LOWPASS” turns the crossover control ON. This setting is best
when using the XJ-300ST as a mono block or subwoofer amplifier.

Power

Signal Sensing

audio signal?

+12V signal?

LED

ON

AUTO ON

Yes

n/a

On

No

n/a

Off

ON

+12V TRIG

Yes

Yes

On

No

No

On

OFF

+12V TRIG

Yes

Yes

On

No

No

Off

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