EarthQuake XJ-300R User Manual

USER’S MANUAL

Earthquake Sound reserves the right to amend details of the specifications without notice.

© Copyright Earthquake Sound Corporation

Earthquake Sound Corporation

2727 McCone Avenue, Hayward CA, 94545

Phone: [phone] U.S. Toll Free: [phone] Fax: [phone]

Congratulations......................................

Features.................................................

Crossover Setting...................................

Phase Setting.........................................

Using with Q10B.....................................

Using with MQB-1...................................

Using with THOR In-Wall SUB10...........

Schematic...............................................

Warranty Information........................

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CONGRATULATIONSTABLE OF CONTENTS

Congratulations and thank you for purchasing the XJ-300R amplifier. The
XJ series are stand alone compact amplifiers that allow custom home
installation to have a powerful high efficiency amplification while fitting
into small places. The XJ-300R comes with a set of standard ears that
allows the user to install it in a standard single rack mount. Whether you
are looking to power a subwoofer or a tactile transducer, the XJ-300R is
guaranteed to deliver.

Powered by a switching regulated power supply, the XJ delivers a steady
and regulated output which delivers a linear amplification to your load.
Only through linear amplification do you get the chance to deliver
accuracy in amplification.

What is class J?
Class J is a monitoring circuit that optimizes class D amplifiers. The
class J is a class D amplifier which has a microprocessor algorithm that
trades in high efficiency for high quality throughout the audio spectrum.
In simple terms, the class J gives you the highest efficiency possible
without compromising quality.

The XJ amplifiers possess an oversized power supply: 8 ohms, 4 ohms,
and even 2 ohms. These amplifiers will deliver clean, accurate sound
with massive damping factor.

Enjoy!

FEATURES

If the LED light is:
red = amplifier is in auto mode
green = amplifier is sensing signal
amplifier is on

auto music sensing setting:
amplifier automatically turns on
when music is on- if the music is
not on for 20 min., the amplifier
goes into sleep mode.

110V/220V switch

comes with 1 pair of mounting ears
to fit into a rack (takes 1 rack space)

comes with rubber
legs for shelf option

amplified output

to your IW-SUB10

or your tactile

If you are using the XJ-300R to drive a
subwoofer (including Earthquake’s THOR
In-Wall SUB10), then you will need to set the
crossover below 100Hz.
If you have a large subwoofer such as a 12”,
15”, or even 18”, then you will have a great
response with the crossover set to the 12
o’clock setting or minimum setting.
For use with a 8” or 10” subwoofer, you will
find the 12 o’clock and 2 o’clock setting to be
the best range.

Driving a Q10B
or a MQB-1?

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Driving an
In-Wall SUB10?

Do not use high level input
with bridged amp

Note that the high level input

stage on the XJ300R has a

common mode ground.

Therefore, you cannot use a

bridge mode amplifier as a

high level input.

XJ-300R with Q10B

Q10B

8-Ohm

Application

XJ-300R with MQB-1

MQB-1

4-Ohm Parallel

Application

MQB-1

8-Ohm Standard

Application

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XJ-300R with THOR IW-SUB10

THOR

4-Ohm Standard

Application

Specifications

Frequency Response

28Hz - 175Hz

Power Line Voltage

110-120C ~ AC/60Hz/180W
(220 option)

Dimensions (HxWxD)

2” x 9” x 9”

Weight

4.5 lbs

Finish

Black

Input Sensitivity For Full Output

240mVrms from left input with volume
control at 0dB, 90mVrms with volume
control fully clockwise.

Input Impedance

8.2 kilo-ohm line-level inputs
32-ohm speaker-level inputs

Internal System Gain

42dB from left input jack to speaker with the
Bass Level control at 0dB, 54dB with the
control full clockwise

Output Power into 4 ohm load 280 WRMS
Output Power into 8 ohm load 140 WRMS

PRODUCT SUPPORT

Please contact Earthquake Sound Technical Support Department for questions regarding any of
the products mentioned in this manual.

Earthquake Sound Corporation
[phone] or [phone], 9:00am - 5:00pm Mon-Fri, Pacific Time
Email us at: [e-mail]

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