EarthQuake IQ1500 User manual

The IQ1500 is capable of generating high sound
pressurelevels.Youshouldexercisecautionwhen
operating this amplifier system. Long term
exposures to high levels of sound pressure will cause
permanent damage to your hearing. Sound pressure levels
exceeding85dBcanbedangerouswithconstantexposure.Set
youraudio systemto acomfortable loudnesslevel. Earthquake
Sound Corporation does not assume liability for damages
resulting from the direct use of the IQ1500 , and urges users to
playtheIQ1500 atmoderatelisteninglevels.
THE CHART (ON THE SIDE) SHOWS THE U.S. GOVERNMENTS
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA)
REGULATIONS WHICH WERE IN EFFECT AT THE TIME OF THIS
PUBLICATION FOR PERMISSIBLE NOISE EXPOSURE,
PER 29CFR1910.95, TABLE G-16.
97
100
102
105
110
115
3
2
1 - 1 1/2
1
1/2
1/4 or les s
SOUN D L E V EL
DBA
90
92
95
8
6
4
DURAT ION
IN HOU R S
Congratulations and thank you for choosing the new Earthquake
Subwoofer Power Amplifier as a key component for your audiophile system.
The amplifierisdesignedtomeetthehigheststandardsofperformance
andsoundquality.Inaddition Earthquake Sound’sIQ certification andpatented
Class “J” circuitry ensure that the amplifier meets and exceeds all industry
standards. The new amplifiers include many unique technologies that
allow it to deliver “World Class” performance, even under extreme operating
conditions.
The is a ruggedly constructed high quality professional amplifier. The
Digital feedback class “J” Circuitry, allows the amplifier to produce massive
amountsof power withminimal heat production.Thispatentedcircuitry delivers
high efficiency in the range of 99%-The typical classAB amplifier runs at about
40to50%.
IQ1500 IQ1500
IQ1500
IQ1500
IQ1500
IQ1500
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.
Theinformationwhichisstored inmicroprocessorturnsonapresetgroupdelay
curve that serves as a correction reference. This information deals only with
timecorrectionthatmovesthepeaksandthedipsinaroomtoaflat.Oncethatis
achievedtheuserwillresorttothefinalcorrection-EQtheroom.Forthatreason
Earthquake’s is truly an intelligent system. 20Hz, 30Hz and 40Hz
frequenciescanbecut or boosted byawhopping6dB, these corrections helpin
producingwiderrangeoflisteningpositionthatisunprecedentedfortheroom.
(Note: boosting the response at 20Hz is very demanding for your subwoofer.
Consult with your subwoofer maker, and determine if their subwoofer is
designedtotakeaboostatsuchlowfrequencies.)
Introduction
2
CAUTION:
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier

Unpacking and Warnings
Specifications & features are subject to change without notice. www.earthquakesound.com
3
ITEMIZED LIST OFINCLUDED ACCESSORIES:
1.One(1)ACPowerCable
2.One(1)UsersManual
3.One(1)RegistrationCard
4.One(1)RemoteControl
Whenyouhavesafelyremovedtheamplifierfromthepackagingandplaceditinasafearea,performathoroughphysicalinspectionandreportanydamagetothedealer
thatyoupurchasedtheunitfrom.Wesuggestthatyoukeeptheoriginalpackaging,andthatitshouldbestoredinasafe,dryplaceincaseyou’rerequiredtotransportthe
unit.Thecustomizedpackagingisspeciallydesignedtoprotecttheamplifierfrompotentialdamagethatcanarisewhenshippingsuchaproduct.
Toreduce therisk of fire or electric shock, donot exposethis productto rain or moisture. Don not attemptto “liftthe 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
extremetemperature. AlwaysconnecttheaudiosignalpathcablepriortoconnectingtheACmains.
WARNING!
CAUTION! No user-serviceableparts inside. Donot attemptto remove coveror repair this product, assevere electrical shockmay resultand it may
disruptyourwarranty.
IMPORTANT! MakesurethatyourlocalACvoltagecomplieswiththeunit’slabel.DamagecausedbypluggingthisamplifierintoanACreceptacleofthe
wrongvoltagewillnotbecoveredbywarranty.
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier

Subwoofer Placement Guide
Why having two gains on a mono subwoofer is
a good thing?
Often you hear the term “subwoofers are non-directional”;
thisisnottruesubwooferplacementishardertopickwhento
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.Thesignal toboth 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
solutiontothisproblem.
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 sub-
harmonics. The use of two subwoofers allows you to cross
thesubupto150 Hz sound quality,imaging and staging.The
two-front-subwoofer-systemisanexcellentsolutiontoplaner
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
bassnotesandtheirplacement.
If a bass Guitar player was standing on the left side of the
stage,andheplayedanEEnote(42Hz)thentherightsubwill
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 three-
dimensional front-end bass that allows you to have a low
frequency dynamic stage, Earthquake designed dual input
circuitsthatusebufferstomaintainyourstereoseparationon
the processor side while mixing stereo front signals to
produce3Dbass.
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
BETTER / This illustration shows dual subwoofer with mono signal
4
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
BEST / This illustration shows dual subwoofers with stereo+mono signals
GOOD / This illustration shows a single subwoofer setup
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
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier

Front and Back Panel Overview
5
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier
Remote Sensor Input
Channel Status LEDs
Auto Sensing
24dB/Oct
Lowpass
With Bypass
Removable
AC Power
Supply Cord
Individual Channel
Gain Controls
0-20 MS.Phase Delay
0°-180° Phase Shift
25Hz, 12dB/Oct
Switchable
Subsonic Filter
20, 30 and 40Hz
Room Equalization
With 12dB range
and Boost
Required LFE Inputs
Use One Only
PHASE SHIFT
0° 180°
1
RCA
XLR
SPK
2
RCA
XLR
SPK
GAIN 1GAIN 2
PHASE DELAY
0 20ms
SUBSONIC
EQUALIZER
ON OFF
ON OFF
20Hz
-6dB +6dB
30Hz
-6dB +6dB
40Hz
-6dB
110-120VAC
ON
+6dB
OFF
POWER
110-120V ~ /60Hz
220-240 ~ /50Hz
600W
CROSSOVER
-40Hz 200Hz
ON BY PASS
AUTO
IR INPUT
220-240VAC
POWERED SUBWOOFER
CAUTION VORSICHT
VOR DEM Ö FF NEN
NETZSTECKER ZIEHEN
BEFORE OPENING
PULL MAIN PLUG
RCA Inputs
XLR Inputs
Speaker Level Input
Fuse box

The back side of a typical processor or receiver
Dual Subwoofer Stereo Connection
6
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier
PHASE SHIFT
0° 180°
1
RCA
XLR
SPK
2
RCA
XLR
SPK
GAIN 1GAIN 2
PHASE DELAY
0 20ms
SUBSONIC
EQUALIZER
ON OFF
ON OFF
20Hz
-6dB +6dB
30Hz
-6dB +6dB
40Hz
-6dB
110-120VAC
ON
+6dB
OFF
POWER
110-120V ~ /60Hz
220-240 ~ /50Hz
600W
CROSSOVER
-40Hz 200Hz
ON BY PASS
AUTO
IR INPUT
220-240VAC
POWERED SUBWOOFER
CAUTION VORSICHT
VOR DEM Ö FF NEN
NETZSTECKER ZIEHEN
BEFORE OPENING
PULL MAIN PLUG
PHASE SHIFT
0° 180°
1
RCA
XLR
SPK
2
RCA
XLR
SPK
GAIN 1GAIN 2
PHASE DELAY
0 20ms
SUBSONIC
EQUALIZER
ON OFF
ON OFF
20Hz
-6dB +6dB
30Hz
-6dB +6dB
40Hz
-6dB
110-120VAC
ON
+6dB
OFF
POWER
110-120V ~ /60Hz
220-240 ~ /50Hz
600W
CROSSOVER
-40Hz 200Hz
ON BY PASS
AUTO
IR INPUT
220-240VAC
POWERED SUBWOOFER
CAUTION VORSICHT
VOR DEM Ö FF NEN
NETZSTECKER ZIEHEN
BEFORE OPENING
PULL MAIN PLUG
The same wiring configuration can be
duplicated for the XLR inputs. NOTE: We
provide three different input types, but
do not recommend mixing input types.
LEFT LEFT SUR CENTER
RIGHT RIGHT SUR SUB
MAIN AUDIO OUTPUTS
LEFT
RIGHT
INPUT Split L/R RCA's To Amplifiers
LEFT/RIGHT Channels.

Single Subwoofer Mono Connection
7
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier
The back side of a typical processor or receiver
PHASE SHIFT
0° 180°
1
RCA
XLR
SPK
2
RCA
XLR
SPK
GAIN 1GAIN 2
PHASE DELAY
0 20ms
SUBSONIC
EQUALIZER
ON OFF
ON OFF
20Hz
-6dB +6dB
30Hz
-6dB +6dB
40Hz
-6dB
110-120VAC
ON
+6dB
OFF
POWER
110-120V ~ /60Hz
220-240 ~ /50Hz
600W
CROSSOVER
-40Hz 200Hz
ON BY PASS
AUTO
IR INPUT
220-240VAC
POWERED SUBWOOFER
CAUTION VORSICHT
VOR DEM Ö FF NEN
NETZSTECKER ZIEHEN
BEFORE OPENING
PULL MAIN PLUG
Usually one RCA has enough signal to
drive the IQ amplifier to its full output.
However, in some cases where signal is
too low for the IQ amp to produce its full
output, you may use a "Y" connector to
increase the amp's sensitivity.
LEFT LEFT SUR CENTER
RIGHT RIGHT SUR SUB
MAIN AUDIO OUTPUTS

Room Correction
8
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier
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 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 is truly an
intelligent system. 20Hz, 30Hz and 40Hz frequencies can be cut or boosted by a
whopping 6dB, these corrections help in producing wider range of listening position
thatisunprecedentedfortheroom.
(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
boostatsuchlowfrequencies.)
IQ1500
IQ1500

Amplifier Specifications
9
Specifications Are Subject To Change Without Notice
POWER OUTPUT
FREQUENCY RESPONSE
TOTAL HARMONIC DISTORTION
SLEW RATE
SIGNAL TO NOISE RATIO
LOAD IMPEDANCE
DAMPING FACTOR
CONTROLS
INPUT CONNECTIONS
OUTPUT CONNECTIONS
MODE SWITCHES
PROTECTION CIRCUITRY
POWER REQUIREMENTS
IQ-600R=10A
SIZE AND WEIGHT
1 x 1100watts RMS @ 4 ohms Mono (1% distortion)
1 x1500 watts RMS @ 2 ohms Mono (1% distortion)
1 x 700 watts RMS @ 8 ohms Mono (1% distortion)
20Hz-2kHz
<0.08%, (1W/4ohm)
55 volts / microsecond
> 106dB (balanced) 105dB (unbalanced) @ rated power
2 ohms or greater
> 500
XLR / RCA • High-level
Binding posts • Locking mechanism
Phase switch 0° / 180° - Variable time delay 0 to 20 millisecond
Short circuit, open circuit, RF burnout, over temp,
protection, DC protection, limiter circuitry turn on/off transient
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
110-120VAC~/60Hz
H=1.7" x W=19" x D=14.5"
44mm x 483mm x 367mm
26.04lbs. • 12.2Kg
IQ Subwoofer Power Amplifier

Earthquake warrants the original purchaser that all Factory Sealed - Bent speaker frame, broken speaker connectors, holes in speaker
NewAudio Products be free from defects in material and workmanship, under cone,surround&dustcap,burntspeakervoicecoil.
normal and proper use, for a period of five (5) years from the date of purchase - Fading, deterioration of speaker components & finish due to improper
(asshownontheoriginalbillofsalewithserialnumberaffixed/writtenonit).The exposuretoelements.
five (5) years warranty period is valid only if the product is properly installed by - Bent amplifier casing, damaged finish on the casing due to abuse,
an Earthquake authorized party, and the warranty registration card is properly misuse,orimproperuseofcleaningmaterial.
filled out and sent to Earthquake Sound Corporation. If the product is installed - BurnttracersonPCB.
byanon-authorizedparty,aninety(90)dayswarrantyperiodapplies. - Product/part damaged due to poor packaging or abusive shipping
conditions.
(A)Five(5)yearslimitedwarrantyplancoverageguidelines: - Subsequentdamagetootherproducts.
Awarranty claim will not be valid if the warranty registration card is not properly
- First year: Earthquake pays for labor, parts, and ground freight (only in filled& returnedto Earthquakewith acopyof thesales invoice.
USmainland,notincludingAlaskaandHawaii)backtocustomer.
- Secondyear: Earthquake pays forlabor and partsonly,customermust (E)ServiceRequest:
payfreightbothways.
- Third, fourth & fifth year: Earthquake pays labor only. Customer must To receive product/s service, contact Earthquake service department
payforpartsandfreightbothways. at(510)732-1000andrequestanRMAnumber(ReturnMaterialAuthorization),
items shipped without a valid RMA number will be refused. Make sure you
(B)Warning: provideus with yourcomplete/correct shipping address,a valid phonenumber,
and a brief description of the problem you are experiencing with the product. In
Products (sent for repair) that are tested by Earthquake technicians most cases, our technicians might be able to resolve the problem over the
anddeemedtohavenoproblem,willnotbecoveredby thefive(5)yearslimited phone,thuseliminatingtheneedtoshiptheproduct.
warranty.Customerwillbechargedaminimumofone(1)houroflabor(ongoing
rates)plusshippingchargesbacktocustomer. (F)ShippingInstructions:
(C) Earthquake agrees to repair or replace - at our option - all such defective Product/smust be packaged inits original protective box/s to minimize
products/partssubjecttothefollowingprovisions: transport damage. Shipper claims regarding items damaged in transit must be
presentedtocarrier.EarthquakeSoundCorporationreservestherighttorefuse
- Defective products/parts have not been altered or repaired by other product improperly packed. Original bill of sale must accompany product
thananEarthquakefactoryapprovedtechnician. returned for service. We encourage you to include with the package a written
- Products/partsare notsubjected tonegligence,misuse, improperuse, description of the problem. Ship product to: Earthquake Sound Corp. 2727 Mc
oraccident,damagedby improper line voltage,usedwithincompatible ConeAvenue,Hayward,CA94545.Ph(510)732-1000.Youareresponsiblefor
products, or have its serial number or any part of it altered, defaced or thecostofshippingtheproducttoEarthquakeSoundCorporation.
removed,orhavebeenusedinanywaythatiscontrarytoEarthquake's
writteninstructions. (G)DisputesResolution:
(D)WarrantyLimitations: All disputes - between clients and Earthquake Sound Corporation -
resulting from the five (5) years limited warranty policy must be resolved
Earthquake warranty does not cover products that have been modified or accordingtothelaws&regulationsofthecountyofAlameda-California.
abused.Includingbutnotlimitedtothefollowing:
- Damages to speaker cabinet and cabinet finish due to misuse, abuse,
useofimproperuseofcleaningmaterials/methods.
Consumer Warranty & Guidelines
10
Specifications Are Subject To Change Without Notice
IQ Subwoofer Power Amplifier

11
Specifications Are Subject To Change Without Notice
The IQ1500 is capable of generating high sound
pressurelevels.Youshouldexercisecautionwhen
operating this amplifier system. Long term
exposures to high levels of sound pressure will cause
permanent damage to your hearing. Sound pressure levels
exceeding85dBcanbedangerouswithconstant exposure. Set
youraudio systemto acomfortable loudnesslevel. Earthquake
Sound Corporation does not assume liability for damages
resulting from the direct use of the IQ1500 , and urges users to
playtheIQ1500 atmoderatelisteninglevels.
THE CHART (ON THE SIDE) SHOWS THE U.S. GOVERNMENTS
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA)
REGULATIONS WHICH WERE IN EFFECT AT THE TIME OF THIS
PUBLICATION FOR PERMISSIBLE NOISE EXPOSURE,
PER 29CFR1910.95, TABLE G-16.
97
100
102
105
110
115
3
2
1 - 1 1/2
1
1/2
1/4 or les s
SOUN D L E V EL
DBA
90
92
95
8
6
4
DURAT ION
IN HOU R S
CAUTION:

Earthquake Sound Corporation • www.earthquakesound.com • 2727 McCone Avenue Hayward, California 94545 • Phone: [phone], Fax: [phone]
Sound That Will Move You.