Earthquake Sound IQ600 User Manual

MODEL

IQ600

Sound That Will Move You.

Digital Feedback Class “J” Subwoofer Amplifier

600WRMS

USER MANUAL

Earthquake Sound Corporation | 2727 McCone Avenue, Hayward CA 94545

www.earthquakesound.com

Introduction

IQ Suboowfer Power Amplifier

Congratulations and thank you for choosing the new Earthquake

IQ600
Subwoofer Power Amplifier as a key component for your audiophile system.
The amplifier is designed to meet the highest standards of performance

IQ600
and sound quality. In addition Earthquake Sound’s IQ certification and patented
Class “J” circuitry ensure that the amplifier meets and exceeds all industry
standards. The new amplifiers include many unique technologies that

IQ600
allow it to deliver “World Class” performance, even under extreme operating
conditions.

The is a ruggedly constructed high quality professional amplifier. The

IQ600
Digital feedback class “J” Circuitry, allows the amplifier to produce massive
amounts of power with minimal heat production. This patented circuitry delivers
high efficiency in the range of 99%- The typical classAB amplifier runs at about
40 to 50%.

IQ600

The 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 thepeaks andthe dips in a room to aflat. Oncethat is
achieved the user will resort to the final correction- EQ the room. For that reason
Earthquake’s is truly an intelligent system. 20Hz, 30Hz and 40Hz

IQ600

frequencies can be cut orboosted by a whopping 6dB, these corrections help in
producing wider range oflistening position that isunprecedented 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 at such low frequencies.)

SOUND LEVEL

DBA

90
92
95

97
100
102
105
110
115

DURATION

IN HOURS

8
6
4
3
2
1 - 1 1/2
1
1/2
1/4 or le ss

THE CHART (ON THE SIDE) SHOWS THE U.S. GOVERNMENTS

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA)

REGULATIONS WHICH W ER E IN E FF EC T AT THE TIME OF THIS

PUBLICATION FOR PERMISSIBLE NOISE EXPOSURE,

PER 29CFR1910.95, TABLE G-16.

Specifications Are Subject To Change Without Notice

CAUTION:

The IQ600 is capable of generating high sound
pressure levels. You shouldexercisecautionwhen

operating this amplifier system. Long term
exposures to high levels of sound pressure will cause
permanent damage to your hearing. Sound pressure levels
exceeding 85dB can be dangerous with constant exposure. Set
your audio system to a comfortable loudness level. Earthquake
Sound Corporation does not assume liability for damages
resulting from the direct use of the IQ600 , and urges users to
play the IQ600 at moderate listening levels.

2

Unpacking and Warnings

ITEMIZED LIST OF INCLUDEDACCESSORIES:

1. One (1) AC Power Cable

2. One (1) OwnersManual

3. One (1) RegistrationCard

4. One (1) RemoteControl

4. Rack Mounting Bracketsand Screws

When you havesafely removedthe amplifier from the packaging andplaced it in a safe area,perform athorough physical inspection and report anydamage to the dealer
that you purchased the unit from. Wesuggest that you keep the original packaging, and thatit shouldbe storedin a safe, dry place in case you’rerequired totransport the
unit. The customizedpackaging is specially designed to protectthe amplifier from potential damagethat can arise when shipping sucha product.

IQ Suboowfer Power Amplifier

WARNING!

CAUTION!

IMPORTANT!

Specifications Are Subject To Change Without Notice

Specifications & features are subject to change without notice. www.earthquakesound.com

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
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 theaudio signalpath cable prior to connectingthe AC 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.

Make sure that your localAC voltage complies withthe unit’s label. Damage caused byplugging thisamplifier into anAC receptacle of the
wrong voltage will notbe covered by warranty.

3

Subwoofer Placement Guide

IQ Suboowfer Power Amplifier

GOOD / This illustration shows a single subwoofer setup

Why having two gains on a mono subwoofer is
a good thing?

Often you hear the term “subwoofers are non-directional”;
this is not true subwoofer placement is harder to pick when
low frequencies
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 to this problem.

are crossed . The wider the room, the more

to

Two Subs

While having two subwoofers is better than one, the MONO
signal that drives these subwoofer keeps them from
projecting the three dimensional images in the sub­harmonics. The use of two subwoofers allows you to cross
the sub up to 150 Hzsound quality, imaging and staging. The
two-front-subwoofer-system is an excellentsolution 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 theirplacement.

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

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 heplayed anEE note (42Hz) then the rightsub will
also respond to that and create havoc on the stage. In fact 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 three­dimensional 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.

Specifications Are Subject To Change Without Notice

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

4