MODEL
XJ-600R
DIGITAL FEEDBACK CLASS “J” MONOBLOCK AMPLIFIER
USERS MANUAL
Sound That Will Move You
XJ-600R Subwoofer Power Amplifier
Unpacking and Warnings
ITEMIZED LIST OF INCLUDED ACCESSORIES:
1. One (1)AC Power Cable
2. One (1) Users Manual
3. One (1) Registration/Warranty Card
4. One (1) Remote Control
4. Rack Mounting Brackets and Screws
When you have safely removed the amplifier from the packaging and placed it in a safe area, perform a thorough physical inspection and report any damage to the dealer
that you purchased the unit from. We suggest that you keep the original packaging, and that it should be stored in a safe, dry place in case you’re required to transport the
unit.The customized packaging is specially designed toprotect the amplifier frompotential damage thatcan arise when shipping such a product.
To reduce the risk of fire or electric shock, do not expose this product to rain or moisture. Don not attempt to “lift the ground” by removing
WARNING!
the ground pin from the AC cable. Make sure that your household electrical wiring supports proper AC grounding techniques before
plugging in this product. Keep the heat sinks and top cover free of dust to allow for proper heat dissipation. Never expose this product to
extreme temperature. Always connect the audio signal path cable prior toconnecting theAC mains.
No user-serviceable parts inside. Do not attempt to remove cover or repair this product, as severe electrical shock may result and it may
disrupt your warranty.
CAUTION!
Make sure that your localAC voltage complies with the unit’s label. Damage caused by plugging this amplifier into anAC receptacle of the
wrong voltage will not be covered by warranty.
IMPORTANT!
Specifications Are Subject To Change Without Notice
3
XJ-600R Subwoofer Power Amplifier
Subwoofer Placement Guide
Why having two gains on a mono subwoofer is
a goodthing?
GOOD / This illustration shows a single subwoofer setup
Often you hear the term “subwoofers are non-directional”;
this is not true subwoofer placement is harder to pick when to
low frequencies are crossed . The wider the room, the more
directional the subwoofer. The easiest solution is to use two
subwoofers in the front: one on the left and a second on the
right. The signal to both is mono. In some applications, users
might have small front speakers or planer speakers. Both
speakers have an early roll off in the sub-harmonics. The
planer needs help from 150Hz on down, having two front
subwoofers placed on the left and the right is a health
solution tothis problem.
The blue arrow represents the subharmonic
frequencies as they move always toward the sub in
the single sub system.
The red arrow represents the lows+ mids+ highs as
they follow the action.
Note the breakaway and the image separation.
Best response if the blue and the red are identical.
BETTER / This illustration shows dual subwoofer with mono signal
TwoSubs
While having two subwoofers is better than one, the MONO
signal that drives these subwoofers keeps them from
projecting the three dimensional images in the sub-
harmonics. The use of two subwoofers allows you to cross
the sub up to 150 Hz sound quality, imaging and staging. The
two-front-subwoofer-system is an excellent solution to planer
speaker’s low frequency response early roll off. When
locating these subwoofers in a close proximity to the stereo
satellite, the subs will enhance low frequency extention. It
will be better to have a stereo subwoofer to help in the lower
bass notes and their placement.
The blue arrow represents the sub-harmonic
frequencies as they move always toward the
middle in a mono-two-subs- system.
The red arrow represent the lows+ the mids+ highs
as they follow the action.
Note the breakaway and the image separation
If a bass Guitar player was standing on the left side of the
stage, and he played an EE note (42Hz) then the right sub will
also respond to that and create havoc on the stage. This can
occur if you only have one single sub in the room and it’s
placed on the right side of the room, while the bass guitar
player is playing his music on the left side of the stage. As
soon as he hits the EE note the sub speaks out on the right
and completely destroys the stage. To give you three-
dimensional front-end bass that allows you to have a low
frequency dynamic stage, Earthquake designed dual input
circuits that use buffers to maintain your stereo separation on
the processor side while mixing stereo front signals to
produce 3D bass.
BEST / This illustration shows dual subwoofers with stereo+mono signals
In this illustration the stereo subwoofers keep the
sub-harmonics dynamically synchronized in
motion with the rest of the audio systems.
Fully complementary sub-harmonics to the mids
and the highs
Specifications Are Subject To Change Without Notice
4
XJ-600R Subwoofer Power Amplifier
Front and Back Panel Overview
24dB/Oct Lowpass
Crossover With
Bypass Option
Main Power
ON/OFF Switch
0-180° Phase
Correction
Room Equalization
Adjustment Center
Channel and Power
Status LEDs
POWER
SUBSONIC
ON
PHASE SHIFT PHASE DELAY
ROOM CORRECTION
30Hz
GAIN
CROSSOVER
ON
POWER
0
20Hz
40Hz
IN
ON
MAIN
AUTO
CH2
CH1
OFF
180
0
20ms
-6dB +6dB -6dB +6dB -6dB +6dB
OUT
40Hz
200Hz
BYPASS
OFF
XJ-600R
DUAL INPUT - MONO BLOCK - CLASS "J" POWER AMPLIFIER
25Hz 12dB/Oct
Switchable
Subsonic Filter
Phase Shift
By Delay Up
To 20ms
MAIN GAIN
Music Sensing Auto
Turn ON Switch
Push Button
One push of the knob will
adjust input channel-1,
another push will adjust
channel-2 and a third push
will adjust both gains
simultaneously (master
gain). The XJ's LEDs will
indicate which channel is
selected.
OFF Position: Required when
amp is powered via the 12VDC
trigger input located at the back
o f t h e a m p l i f i e r .
ON Position: Amp on all of the
time (not recommended).
AUTO Position: If no signal is
present the amp will go to sleep
a f t e r 2 0 m i n u t e s
(recommended).
XJ Remote Control
In mute mode, the MAIN LED will be
flashing on and off.
MUTE
One remote can be used to
simultaneously control the Volume
on multiple XJ amplifiers
VOLUME
CH-SEL
For selecting control channels
High Buffered Mixer
of LFE & Stereo
110-120V/
220-240V
Switch
Speaker
Output
AC Power
Connection
Signal Input CH-2
Signal Input CH-1
Ground
HI-LEVEL
XLR
RCA
HI-LEVEL
SPEAKER OUTPUT
110-120V
220-240V
6.3 AMPS
MAX
12VDC IR
TRIGGER INPUT
110-120V~/60Hz 110-120V, FUSE T6.3AL/250V
220-240V~/50Hz 220-240V, FUSE T3.15AL/250V
CH2 INPUT
CH1 INPUT
DC 12V Trigger Input Sensor Input
Standard 1/8" Standard 1/8"
Use Only 1 Input For Each Channel
Fuse Holder
Specifications Are Subject To Change Without Notice
5
XJ-600R Subwoofer Power Amplifier
Single Subwoofer (Stereo & Mono) Connection
The back side of a typical processor or receiver
GOOD
Single subwoofer application
RCA splitters can be used to double the
input signal strength. Maximum output
can be reached with 400mv input, using
one RCA.
HI-LEVEL
XLR
RCA
HI-LEVEL
SPEAKER OUTPUT
110-120V
220-240V
6.3 AMPS
MAX
12VDC IR
TRIGGER INPUT
110-120V~/60Hz 110-120V, FUSE T6.3AL/250V
220-240V~/50Hz 220-240V, FUSE T3.15AL/250V
CH2 INPUT
CH1 INPUT
SUB
Specifications Are Subject To Change Without Notice
6
XJ-600R Subwoofer Power Amplifier
Dual Subwoofer (Stereo & Mono) Connection
The back side of a typical processor or receiver
BEST
Three dimensional
subharmonic system
using two XJ600-R
and two subwoofers
HI-LEVEL
XLR
RCA
HI-LEVEL
SPEKER OUPUT
110-120V
220-240V
6.3 AMPS
MAX
12VDC IR
TRIGGER INPUT
110-120V~/60Hz 110-120V, FUSE T6.3AL/250V
220-240V~/50Hz 220-240V, FUSE T3.15AL/250V
CH2 INPUT
CH1 INPUT
HI-LEVEL
XLR
RCA
HI-LEVEL
SPEAKER OUTPUT
110-120V
220-240V
6.3 AMPS
MAX
12VDC IR
TRIGGER INPUT
110-120V~/60Hz 110-120V, FUSE T6.3AL/250V
220-240V~/50Hz 220-240V, FUSE T3.15AL/250V
CH2 INPUT
CH1 INPUT
RIGHT
7
LEFT
Specifications Are Subject To Change Without Notice
XJ-600R Subwoofer Power Amplifier
Room Correction
The XJ-600R offers a room correction technique that surpasses that of all previous
attempts. The intelligent “Back EMF” drive circuit interacts with the subwoofer design
and memorizes system tuning frequencies and system type. The information which is
stored in microprocessor turns on a preset group delay curve that serves as a
correction reference. This information deals only with time correction that moves the
peaks and the dips in a room to a flat. Once that is achieved the user will resort to the
final correction- EQ the room. For that reason Earthquake’s XJ-600R is truly an
intelligent system. 20Hz, 30Hz and 40Hz frequencies can be cut or boosted by a
whopping 12dB, these corrections help in producing wider range of listening position
thatis unprecedented forthe room.
(Note: boosting the response at 20Hz is very demanding for your subwoofer. Consult
with your subwoofer maker, and determine if their subwoofer is designed to take a
boost atsuch low frequencies.)
When setting the room EQ, DO NOT over power the speakers as
this may cause them to bottom out or cause other more severe
problems that your warranty will not cover. To set up the room
EQ, you will need a Spectrum-Analyzer, or you can use the rule of
thumb.
Specifications Are Subject To Change Without Notice
8
XJ-600R Subwoofer Power Amplifier
Amplifier Specifications
POWER OUTPUT
1 x 700 watts RMS @ 2-Ohms
1 x 570 watts RMS @ 4-Ohms
1 x 320 watts RMS @ 8-Ohms
FREQUENCY RESPONSE
10Hz - 2.4kHz
TOTAL HARMONIC DISTORTION
<0.08%, (1W/4ohm)
SLEW RATE
50 volts / microsecond
SIGNAL TO NOISE RATIO
LOAD IMPEDANCE
> 89dB (balanced) 85dB (unbalanced) @ rated power
2 ohms or greater
DAMPING FACTOR
CONTROLS
> 500
Power • Room equalization • Room equalization IN/OUT • Subsonic
filter • Phase shift • Lowpass, Bypass • Channel and power status
LEDs • Dual gains internally mixed • Music sensing ON/OFF • DC
turn ON/OFF
INPUT CONNECTIONS
OUTPUT CONNECTIONS
MODE SWITCHES
XLR / RCA • High-level
Binding posts
Phase switch 0° - 180° - Variable time delay 0 to 20 millisecond
PROTECTION CIRCUITRY
Short circuit, open circuit, RF burnout, over temp, turn on/off transient
protection, DC protection, limiter circuitry
POWER REQUIREMENTS
SIZE AND WEIGHT
110-120VAC~/60Hz
110V-240V~/50Hz
H=1-3/4" x W=19" x D=14-1/2"
44mm x 483mm x 367mm
18.76lbs. • 7.6Kg
1U
RACK MOUNT SPACE
Specifications Are Subject To Change Without Notice
9
XJ-600R Subwoofer Power Amplifier
Troubleshooting Information
XJ-600R troubleshoot guide:
This menu is built around installer's feed back and some basic issues they may face in the field. It is intended to provide you with ideas on how to troubleshoot & isolate
the problem.
WARNING: Do not tamper with the internal circuitry doing so may cause damage to you, the amplifier and will indefinitely void the warranty.
Problem:
1. No PowerAtAll: Make sure the main power switch is ON (pressed in/left front panel), check forAC power presence, then check if main circuit breaker is tripped off or if
power cord came unplugged. If all the above passed the test, check the fuse located in the power inlet, horizontal drawer case. Replace it with the appropriate size. If the
amp still doesn't work or continues toblow fuses then proceed tocall Earthquake's tech department.
2. Amp Powers Up But No Output: GREEN light is On; switch the Auto turn On selector (right front panel) to the off position and shut down the signal source
(processor/receiver). LED status should be RED now. Next, switch the selector to the middle position,AUTO; now turn on the signal source and watch for the LED status
toturn GREEN. IfLED does not turn GREEN then the amplifier is not detecting a signal. Check the audio connection &set-up before the amplifier.
3. RED LightAlways Stays On: Unplug the amplifier from the wall outlet and wait 20-seconds then reconnect the power plug. Now power up amplifier without any signal
connected toitand watch forthe LED statustoturn GREEN.
If you have tried and failed with all of the provided solution then you should call Earthquake for further assistance: 800-576-7944
Specifications Are Subject To Change Without Notice
10
XJ-600R Subwoofer Power Amplifier
Consumer Warranty & Guidelines
Earthquake warrants the original purchaser that all Factory Sealed
New Audio Products be 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 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 ninety (90) days warranty period applies.
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Bent speaker frame, broken speaker connectors, holes in speaker
cone, surround &dust cap, burnt speaker voice coil.
Fading, deterioration of speaker components & finish due to improper
exposure toelements.
Bent amplifier casing, damaged finish on the casing due to abuse,
misuse, or improper use ofcleaning material.
Burnt tracers on PCB.
Product/part damaged due to poor packaging or abusive shipping
conditions.
Subsequent damage toother products.
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(A)Five (5) years limited warranty plan coverage guidelines:
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Awarranty claim will not be valid if the warranty registration card is not properly
filled &returned toEarthquake with a copy ofthe sales invoice.
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First year: Earthquake pays for labor, parts, and ground freight (only in
US mainland, not includingAlaska and Hawaii) back tocustomer.
Second year: Earthquake pays for labor and parts only, customer must
pay freight both ways.
Third, fourth & fifth year: Earthquake pays labor only. Customer must
pay forparts and freight both ways.
(E)Service Request:
To receive product/s service, contact Earthquake service department
at (510) 732-1000 and request an RMAnumber (Return MaterialAuthorization),
items shipped without a valid RMA number will be refused. Make sure you
provide us with your complete/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 toship the product.
(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 charges back tocustomer.
(F)Shipping Instructions:
(C) Earthquake agrees to repair or replace - at our option - all such defective
products/parts subject tothe following provisions:
Product/s must be packaged in its original protective box/s to minimize
transport damage. Shipper claims regarding items damaged in transit must be
presented to carrier. Earthquake Sound Corporation reserves the right to refuse
product improperly packed. Original purchase receipt must accompany product
returned for service. We encourage you to include with the package a written
description of the problem. Ship product to: Earthquake Sound Corp. 2727 Mc
ConeAvenue, Hayward, CA94545. Ph (510) 732-1000. You are responsible for
the costofshipping the product toEarthquake Sound Corporation.
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Defective products/parts have not been altered or repaired by other
than an Earthquake factoryapproved technician.
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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 or
removed, or have been used in any way that is contrary to Earthquake's
written instructions.
(G)Disputes Resolution:
(D) Warranty Limitations:
All disputes - between clients and Earthquake Sound Corporation -
resulting from the five (5) years limited warranty policy must be resolved
according tothe laws ®ulations ofthe county ofAlameda -California.
Earthquake warranty does not cover products that have been modified or
abused. Including but not limited tothe following:
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Damages to speaker cabinet and cabinet finish due to misuse, abuse,
use ofimproper use ofcleaning materials/methods.
Specifications Are Subject To Change Without Notice
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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