XJ-300 FR
2 Channel or Monoblock Class “J” Amplifier
User’s Manual
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Safety Instructions
1) Read these instructions in their entirety.
2) Store this manual and packaging in a safe place.
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 grounding-
type 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: power-
supply 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.
Specifications are subject to change without notice
XJ-300FR Manual
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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-300FR.
• 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.
4
XJ-300FR Manual
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Introduction
The XJ-300FR 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-300FR 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-300FR is only one rack space tall and has a half-rack width chassis.
This smart design features a patented interlocking design so two XJ-300FRs
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-300FRs 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-300FRs can power a 2.1 channel system. This depends on
how much power you want to output to your speakers. One XJ-300FR can
be used for two speakers while the other can be bridged as a monoblock.
Alternatively, you can use two linked XJ-300FRs 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-300FR 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-300FR
can perform accurately in every situation.
Included in the Box
1 XJ-300FR Stereo Class “J” Amplifier
4 Short Mounting Ears
1 Bracket
4 Screws for the Bracket
1 Power Cord
Specifications are subject to change without notice
XJ-300FR Manual
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Front Features
1) Power Switch:
3) Auto Music Sensing:
Switch to “ON” to turn
Amplifier automatically
on or to use the Auto on turns on when it senses
music sensing feature. signal.
2) LED Light:
Green light signifies the
amp is on.
1) Power Switch:
In order to enable the auto on music sensing feature, please see 3.
3) To Enable Auto Music Sensing:
A) Back toggle switch must be set to “RCA” (the down position).
B) Front toggle switch must be set to “AUTO ON”.
C) Power switch must be set to “ON”.
D) With signal, amplifier comes on right away.
E) When there is no signal for three minutes, the amplifier shuts off.
4) Bypass/Lowpass Toggle Switch:
When set to Bypass, it overrides the phase and crossover controls.
They are only to control low frequencies.
5) Phase Setting:
If you are using the XJ-300FR to power a subwoofer, you will
need to set the arrival time of the subwoofer’s frequencies to that of your
speakers. To do this with the highest accuracy, you will need an SPL meter
supplied at most electronics stores.
To set the phase:
A) Send a 50Hz continuous tone signal through the speakers and
the subwoofer at the same time.
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5) Phase Setting:
7) Volume Setting:
Set based on the input
level and power rating of
your load.
Use to correct subwoofer
frequency arrival times.
Can only use when in “Low
Pass” setting.
4) Bypass/Lowpass:
6) Crossover Setting:
Set to Bypass to use as a Room equalization for
2 channel or 2.1 channel subwoofer frequencies.
amplifier. Set to Lowpass Can only use when in “Low
to use as a 1 channel or
subwoofer amplifier.
Pass” setting.
B) Turn the phase knob to zero and place the meter in the listening
position.
C) While the system is playing the 50Hz tone, read the meter.
D) Rotate the phase knob until the meter reads the highest
possible.
E) Take note of the position for future reference.
6) Crossover Setting:
As a rule of thumb:
A) If you are powering the THOR In-Wall SUB10, the Q10B tactile
transducer, or a large subwoofer (12” - 18”), set the crossover to
50Hz - 100Hz.
B) If you are powering a MQB-1 tactile transducer, a 10” subwoofer,
or small front speakers, set the crossover to 70Hz, or the 9
o’clock position.
C) If you powering a small subwoofer (8”) or small speakers, set the
crossover to 100Hz, or the 12 - 2 o’clock position.
Specifications are subject to change without notice
XJ-300FR Manual
7
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Back Features
1) RCA Inputs
The most common
audio input
3) USB Port:
Can receive both power
and signal.
2) Input Toggle
4) Speaker Outputs:
Can be outputted to 2
speakers, two speakers
and a subwoofer, or
bridged to 1 channel.
1) RCA Inputs:
If you are using the XJ-300FR as a mono block (1 channel
amplifier), connect only the left (white) RCA terminal. Be sure the toggle
switch is set to “RCA” in order to use this input.
2) Input Toggle:
The XJ-300FR is capable of receiving signal through either the
RCA or USB input. Please note that the Auto-on music sensing feature is
only supported by the RCA input.
3) USB Port:
Capable of receiving power and signal, the USB port is optimized
for use with the SWAT 2.4 Wireless Transceiver. It uses the standard USB
5.5V. Be sure the toggle switch is set to “USB” in order to use this input.
USB Port
The four metal contacts enable the USB
to be used for both power and signal. The
outer metal contacts receive the positive
and negative currents while the inner
metal contacts receive the left and right
audio.
(+) (L) (R) (–)
5.5V
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5) 110V/220V Option:
Should already be set
to the correct voltage
depending on your region.
6) Power Supply:
Comes with a replacement
fuse directly under power
inlet.
4) Speaker Outputs:
A) To use the XJ-300FR as a two channel amplifier, connect the
right speaker to the R+ and R- terminals and the left speaker to
the L+ and L- terminals.
B) To bridge the XJ-300FR as a one channel amplifier (or
monoblock), connect the positive speaker wire to the L+ terminal
and connect the negative speaker wire to the R- terminal. Do not
connect anything to the two lower black terminals.
C) To use the XJ-300FR as a 2.1 channel amplifier, connect the
right speaker to the R+ and R- terminals and the left speaker to
the L+ and L- terminals. Then, connect the subwoofer positive to
the L+ terminal and the subwoofer negative to the R- terminal.
5) 110V/220V:
Do not attempt to change the voltage setting. The amplifier should
already be set to the correct voltage depending on your region. If not, please
contact your local Earthquake Sound dealer.
6) Power Supply:
To access the 250V replacement fuse, use a flat head screwdriver
to pry off the plastic cover.
Specifications are subject to change without notice
XJ-300FR Manual
9
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Mounting Options for 1 XJ-300FR
Wall (or Anywhere) Mountable
The XJ-300FR can uniquely be mounted to a wall or inside a cabinet.
Simply screw in the four short ears to the matching holes on the sides of the
amplifier chassis.
Then bolt to any vertical or horizontal
surface.
The XJ-300FR also comes with four rubber feet to not damage the bottom in
the instance that it simply sits on a shelf or cabinet.
10 XJ-300FR Manual
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Linking 2 XJ-300FRs
The XJ-300FR’s ingenious design lets the user link two amplifiers together
depending on the desired channel set-up.
1
1
2
1) Match the bolts on the left side of one amp with the linking holes on the
right side of the other amp.
2) Once they are connected, push the right amp forward while pushing
the left amp backwards until they are locked together. They are linked
correctly when the faceplates are flush.
3) Bracket the backplates of the amps together for added reinforcement.
WHEN LINKING THE AMPS, DO NOT APPLY PRESSURE
ONTO THE FRONTPLATES OR BACKPLATES. THIS
COULD DAMAGE THE TERMINALS, KNOBS, OR TOGGLE
SWITCHES. AMPS DAMAGED IN THIS WAY ARE NOT
COVERED BY THE WARRANTY.
3
Specifications are subject to change without notice
XJ-300FR Manual 11
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Mounting 2 XJ-300FRs
Screw short mounting arms to the outer sides of the amplifiers so they are
rack mountable.
Or screw two mounting arms on each side so the set is wall mountable.
12 XJ-300FR Manual
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Connecting to a Subwoofer/Tactile Transducer
Make sure the front toggle switch is set to “Low Pass” if
connecting to a subwoofer or tactile transducer.
Note:
Wiring with the THOR In-Wall Subwoofer
Receiver/Processor
_
+
Wiring with the Q10B Tactile Transducer
Receiver/Processor
_
+
Specifications are subject to change without notice
XJ-300FR Manual 13
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Connecting to Tactile Transducers
Make sure the front toggle switch is set to “Low Pass” if
connecting to a subwoofer or tactile transducer.
Note:
Wiring with 2 MQB-1 Tactile Transducers
Receiver/Processor
_
_
+
+
Do not wire 1 MQB-1
with the mono bridge
setting. Use either the
left or right speaker
output.
Connecting to Outdoor Speakers
Make sure the front toggle switch is set to “Bypass” if
connecting to speakers or a 2.1 channel system.
Note:
Wiring with AWS All Weather Speakers
Receiver/Processor
_
_
+
+
AWS 602 or AWS 802
This may overload the
speakers. Be sure to
not set the volume too
high.
14 XJ-300FR Manual
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Connecting to Outdoor Speakers (cont.)
Wiring with the ROCK-on 2.1 channel system
Series Wiring
Granite-10D Subwoofer
Receiver/Processor
_
+
_
+
_
_
+
+
This may overload the
speakers. Be sure to
not set the volume too
high.
Granite-52 Speakers
Option 2
Though 1 XJ-300FR is capable of powering the Granite 2.1 system, you can
use 2 linked XJ-300FRs for more power. Set the bridged amplifier to “Low
Pass” to power the subwoofer and set the other amp to “Bypass” to power
the speakers.
This may overload the speakers.
Be sure to not set the volume too
high.
_
_
+
+
_
_
+
+
Granite-10D Subwoofer
Granite-52 Speakers
Specifications are subject to change without notice
XJ-300FR Manual 15
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Connecting to SWAT 2.4 Wireless Transceiver
Make sure the back input toggle switch is set to “RCA” if
connecting to the SWAT 2.4 Version 1.
Note:
The XJ-300FR is optimized for use with the SWAT 2.4 Wireless Transceiver.
After the amplifier is wired to the speakers, connect the SWAT 2.4 Receiver
to the RCA inputs on the XJ-300FR using a mini-jack to RCA Y adaptor. To
power the SWAT 2.4, connect a USB cable from the SWAT to the amplifier.
SWAT 2.4 Wireless Receiver
Connect the SWAT 2.4 Transmitter to your
music source, processor, or computer with
an RCA or mini-jack output. Be sure to
power the SWAT with either the supplied
wall wart or through the USB port. Now you
can wirelessly transmit audio to the XJ-
300FR.
SWAT 2.4 Wireless Transmitter
SWAT 2.4 Version 2 will be able to
transmit both signal and power through
Note:
its USB port, thus eliminating the need
for any RCA connection.
Music Source
with audio output
16 XJ-300FR Manual
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Specifications
Model No.
XJ-300FR
Output Power
8-ohm load: 2 x 110 WRMS
4-ohm load: 2 x 170 WRMS
Mono Bridged:
8-ohm load: 170 WRMS
4-ohm load: 300 WRMS
Frequency Response 20Hz - 20kHz
THD
0.08%
>400
Damping Factor
Signal to Noise Ratio >97dB
Power Line Voltage
110 - 120C ~ AC/60Hz/180W
(110/220V)
Input Sensitivity for
Full Output
max/min: 0 - 5V
Input Impedance
Weight
10Kohm
3.8lbs/1.7kg
Dimensions
8” (chassis)
9-1/2” (including knobs)
1-7/8” (no feet)
2-1/16” (w/ feet)
8-1/2”
7/8”
1-7/8”
Short Ear
1”
Specifications are subject to change without notice
XJ-300FR Manual 17
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5 Year Limited Warranty
Earthquake warrants the original purchaser that the speaker
or amplifier (product) is free from defects in material and workmanship,
under normal and proper use, for a period of five (5) years from the date of
purchase (as shown on the original bill of sale with the serial number affixed/
written on it).
The five (5) years warranty period is valid only if the product is
properly installed by an Earthquake authorized party, and the warranty
registration card is properly filled out and sent to Earthquake Sound
Corporation. If the product is installed by a non-authorized party, a thirty
(30) days warranty period applies.
(A) Five (5) years limited warranty plan coverage guidelines (If installed by
an authorized Earthquake dealer):
• First year: Earthquake pays for labor, parts, and ground freight
(only in the U.S. mainland, not including Alaska and Hawaii)
back to the customer.
• Second year: Earthquake pays for labor and parts only, customer
must pay freight both ways.
• Third, fourth, and fifth year: Earthquake pays for labor only.
Customer must pay for parts and freight both ways.
(B) Warning:
• Products (sent for repair) that are tested by Earthquake
technicians and deemed to have no problem, will not be covered
by the five (5) years limited warranty. Customer will be charged
a minimum of one (1) hour of labor (ongoing rates) plus shipping
back to the customer.
• Each product sent for repair must be packaged in its original
packaging. Otherwise, there will be a repackaging charge in
addition to labor, parts, and shipping charges.
(C) Earthquake agrees to repair or replace, at our option, all such defective
products/parts subject to the following provisions:
• Defective products/parts have not been altered or repaired by
other than an Earthquake factory approved technician.
• Products/parts are not subjected to negligence, misuse, improper
use, or accident, damaged by improper line voltage, used with
incompatible products, or have its serial number or any part of it
altered, defaced, removed, or have been used in anyway that is
contrary to Earthquake’s written instructions.
(D) Warranty Limitations:
Earthquake warranty does not cover products that have been modified and/
or abused, including but not limited to the following:
• Damages to unit cover and finish due to misuse, abuse, or
improper use of cleaning materials/methods.
18 XJ-300FR Manual
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5 Year Limited Warranty (cont.)
• Bent casing, damaged finish on casing due to abuse, misuse, or
improper frame or broken connections.
• Fading, deterioration of components and finish due to improper
exposure to elements.
• Burnt tracers of PCB.
• Product/part damaged due to poor packaging or abusive shipping
conditions.
• Subsequent damage to other products.
A warranty claim will not be valid if the warranty registration card is not
properly filled and returned to Earthquake with a copy of the sales invoice.
(E) Service Request:
To receive product(s) service, contact Earthquake Sound’s service
department at (510) 732-1000 and request an RMA number (Return Material
Authorization), item(s) shipped without a valid RMA number will be refused.
Make sure you provide us with your complete and correct shipping address,
a valid phone number, and a brief description of the problem you are
experiencing with the product. In most cases, our technicians might be able
to resolve the problem over the phone, thus eliminating the need to ship the
product.
(F) Shipping Instructions:
Product(s) must be packaged in its original protective box(es) to
minimize transport damage. Shipper claims regarding item(s) damaged in
transit must be presented to the carrier. Earthquake Sound Corporation
reserves the right to refuse improperly packed product(s). A copy of
original sales receipt must accompany product(s) returned for service. We
encourage you to include a written description of the problem inside the
package. Ship product to:
Earthquake Sound Corp.
2727 McCone Avenue
Hayward, CA 94545 USA
Ph: (510) 732-1000
You are responsible for the cost of shipping the product to Earthquake
Sound Corporation.
(G) Disputes Resolution:
All disputes, between clients and Earthquake Sound Corporation,
resulting from the five (5) years limited warranty policy must be resolved
according to the laws and regulations of the county of Alameda, California.
Specifications are subject to change without notice
XJ-300FR Manual 19
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The Sound That Will Move You.
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: (510) 732-1000 Fax: (510) 732-1095
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