Nova
Power From The Heavens
PA-600
Professional Amplifier
Operation Manual
& Technical Guide
POWER
PROTECT PEAK
SIGNAL
SIGNAL
PEAK PROTECT
CH2
CH1
LEVEL
LEVEL
MIN
MAX
MIN
MAX
MONO
2
C H A N N E L S
/
6 0 0 W A T T S P R O F E S S I O N A L B R I D G E A B L E A M P L I F I E R
VOLTAGE SELECT
115V
230V
SPEAKER OUTPUT
CH2
CH1
LINE LEVEL INPUT
CH2
CH1
+
CH 2
-
+
CH 1
-
CH1
120W/8 Ohm
200W/4 Ohm
120W/8 Ohm
200W/4 Ohm
CH2
FUSE
T3.15A~230V/50Hz
T6.3A~115V/60Hz
230VAC,50Hz
115VAC,60Hz
750W
BRIDGED(MONO)
400W/8 Ohm
M A N U F A C T U R E D B Y E A R T H Q U A K E S O U N D C O R P O R A T I O N.
DEAR VALUED CUSTOM ER .
Earthquake Sound Corporation specializes in manufacturing high end Home and Car
audio products ranging from the smallest driver to the loudest subwoofer system. In its
dedication to excellence, Earthquake has maintained extensive programs in research and
development toprovideyou with thehighest qualityaudioproducts.
channel @ 4 ohms stereo mode or 110 watts per channel @ 8 ohms (stereo mode); 560 watts
@ 4 ohms, 380 watts @ 8 ohms (bridged mono mode). Several "professional" features, such
as 1/4" and XLR input jacks with electronically balanced Low or Medium impedance
operation have been built into the amplifier. Limiting circuitry with LED indicators
constantly monitors the output level of each channel and provides protection from clipping,
thus preventing the generation of speaker-damaging square waves. A built-in protection
circuit protects the amplifier from overloads, short circuits, and overheating. In addition,
each channel features a Signal LED to assist in hookup and troubleshooting and a Fault
LED which indicateswhen theinternal protection circuitry isactivated.
The PA-600 is a ruggedly constructed high quality professional amplifier. The amplifier
mounts into a standard 19" rack, requiring only two rack spaces (3-1/2 inches, vertically).
Two automatic variable-speed internal cooling fans use the sides, rear and the front of the
amplifier - not the top and bottom - for its air intake and exhaust, allowing you to stack
multiple amplifier closer together in a rack mount situation. Additional rack support holes
have been provided along the rear of the amplifier for the most secure installation
possible. (Useoftheseadditional supportsisstronglyrecommended.)
This owners manual is designed to better acquaint you with the PA-600 pro-
amplifier. It is imperative that you read this manual in its entirety. EARTHQUAKE
technicians and staff are looking forward to answer any questions you might have, please
call (1-800-576-7944).
The PA-600 produce up to 300 watts of power per channel @ 2 ohms, 200 watts per
S O U N D LE VE L
D BA
D U R ATI O N
I N H O U R S
CAUTION: the PA-600 is capable of generating high sound
pressure levels. You should exercise caution when 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 PA-600 , and urges
userstoplaythePA-600 in moderatelevels.
90
92
95
8
6
4
3
TH E CH ART (ON TH E SIDE) SH OWS TH E U.S. GOVERNM ENTS
OCCUPATIONAL SAFETY AND H EALTH ADM INISTRATION (OSH A)
REGULATIONS WH ICH WERE IN EFFECT AT TH E TIM E OF TH IS
P UBLICATION FOR P ERM ISSIBLE NOISE EXP OSURE,
P ER 29CFR1910.95, TABLE G-16.
97
2
100
102
105
110
115
1 - 1 1/2
1
1/2
1/4 or less
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PA-600 AM P LIFIER FRONT & REAR PANELS FUNCTIONS/CONNECTION.
4
5
6
6
5
POWER
PROTECT PEAK
SIGNAL
SIGNAL
PEAK PROTECT
CH2
CH1
LEVEL
LEVEL
MIN
6 0 0 W A T T S P R O F E S S I O N A L B R I D G E A B L E A M P L I F I E R
MAX
MIN
MAX
MONO
2
C H A N N E L S
/
2
1
3
7
8
9
10
14
15
7
14
18
11
12
11
12
13
13
16
17
1. POWER SWITCH:
4. POWER INDICATOR LED:
ThisLed illuminateswhen AC power isapplied bymeansofthePower Switch (# 1)
This switch turns the amplifier on in the up position ("I" pressed in ) and off in the down
position. When AC power is applied to the amplifier, the power indicator led (# 4)
illuminates.
5. PROTECT INDICATOR LED'S:
These LED's illuminate whenever the internal protection relay for the channel is activated.
The protection relay is activated for a short period upon initial turn-on and at turn-off to
prevent transient "spikes" from being reproduced through your speakers. A protect condition
is also indicated if the unit gets too hot, or if DC voltages are present at the output. During
thermal protection, both channels are shut down. In the event of DC voltage on the output,
only the affected channel will be disconnected. The circuitry associated with the LED
indicatorsprovidesvaluableprotection for both theamplifier and your speakers.
2. LEVEL CONTROL (CH-1) & MONO:
This rotary potentiometer controls the sensitivity or gain of (CH-1). Set them to the level
needed for the desired output. When amplifier is set in the bridge mono mode, only this level
control (CH-1) isactivein thismode.
3. LEVEL CONTROL CH2:
This rotary potentiometer controls the sensitivity or gain of CH2. Set them to the level
needed for the desired output. When amplifier is set in the bridge mono mode, this level
control isnot active.
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PA-600 AM P LIFIER FRONT & REAR PANELS FUNCTIONS/CONNECTION.
These jacks accept line level signal sources by means of cables fitted with standard ¼” phone
plugs. Low or medium impedance balanced or unbalanced sources are acceptable for these
inputs. Balanced inputs are wired as follows: Tip = Signal (+ ), Ring = Signal (-), Sleeve
= Ground. Unbalanced inputs may be wired: Tip = Signal, Sleeve = Ground, using a
“mono” plug.
6. SIGNAL INDICATOR LEDS:
These LED's illuminate when signal is detected at the amplifier's output terminals,
providing accurate visual confirmation of signal presence, which is helpful in hookup, and
troubleshooting. The output signal must be at least 5% of the amplifier's full rated output to
maketheLED'silluminate.
NOTE: The input channel circuitry requires a line level signal of 1.1V RMS or greater to
drivetheamplifier tofull output.
7. COOLING FAN EXHAUST VENT:
The PA 600 employs a pair of variable-speed internal cooling fans to draw air through the
unit and keep it running cool even under extreme operating conditions. The air is drawn in
through the unit's side and rear intake vents and is forced out through the front panel
exhaust vent. This method of cooling draws air out from the interior of the rack and provides
more efficient cooling methods, which bring air in from the front and exhaust it through the
back. Keep theseventsclear and freefrom obstruction at all timestoinsureproper cooling.
13. BINDING POST OUTPUT:
These output connectors offer an excellent method of connecting the amplifier to your
speakers using cables terminated with spade lugs, banana plugs, or bare wire. When using
the amplifier in the Mono Mode, you must use either the two red binding posts or the
BIAMP/MONO (middle) Phone jack (# 13). The Binding Posts are wired in parallel with
thePhoneJ acks.
8. STEREO / MONO SWITCH:
14. SPEAKER OUT J ACKS:
This switch connects the channels to work together for more power output. In the
“STEREO” position the amplifier is in the STEREO MODE; with the switch in “MONO”
MODE the amplifier is in the Bridge MONO MODE. In the Bridge Mono Mode, connect
input to Channel 1(Channel 2's inputs are disconnected.) Both amp channels are internally
bridged together to create a single-channel amplifier of increased output power. Use the two
red BINDING POSTS (labeled ”Mono/Biamp”) or pins 1+ /2+ of the BIAMP/MONO
(middle) Phonejack.
These heavy-duty output jacks are to be used to connect the amplifier to your speakers using
cables terminated with Phone type plugs. These jacks are wired in parallel with the
BINDING POSTS: channel 1 and 2 Phone J acks are wired with pin# 1(+ ) positive or “in
phase”, and pin# 1(-) ground or “out of phase" (wired 1+ 1-). The MONO /BIAMP jack has
channel 1wired to1+ and 2+ , with 1+ "in phase”.
15. VOLTAGE SELECTOR:
9. NEW AUTO ON / OFF:
Selection of AC 115V/60Hz or AC 230V/50Hz voltage source. Before connecting the power
plug to the wall AC outlet, make sure your local power line AC voltage matches the voltage
settingofamplifier.
The new auto sensing circuitry immediately senses signal as it reaches the amplifier, when
the music stops it will automatically fall asleep. While in sleep mode the PA-600 consumes
lessenergythan commonlysold ProAmps.
16. FUSE: Useonlythetypeoffusespecified on theback ofamplifier.
10. LIMIT SWITCH:
Switch to “ON” position to activate the limit circuit to prevent the amplifier from clipping.
Signal indicator LED's will all be illuminated whenever the input signal attempts to
overdrive the amplifier's output section. Not only does clipping produce harsh sounding
distortion, it is also capable of damaging speaker components-particularly high frequency
drivers.
17. POWER CORD:
This heavy duty power cord must be connected to a grounded Ac outlet of the proper voltage
for the amplifier to operate. TO REDUCE THE RISK OF ELECTREC SHOCK, DO
NOT REMOVE OR BYPASS THE GROUND PRONG OF THE POWER CORD.
18. RCA INPUT: this is the simplest / most common way to drive an audio signal into the
PA-600amplifier.
11. XLR BALANCED INPUT J ACKS:
These jacks will accept any balanced or unbalanced low or medium impedence line level
source by means of a three-pin XLR plug. The wiring for the plug is as follows:
Pin# 1= Ground,
NEW:
Ultra sensitive input pre-amp stage circuitry. Some products on the market can produce
enough voltage to drive an amp but most don't. Earthquake increased sensitivity by giving
you more output with less input signal. This new circuitry will allow you to drive the amp to
full stagewith aslittleas60milivolt.
Pin# 2= Signal (+ ),
Pin# 3= Signal (-).
12. ¼” PHONE J ACK INPUTS:
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PA-600 AM P LIFIER CONNECTION (STEREO & M ONO)
The PA-600 can be used in Stereo Mode as
two separate power amplifiers, each capable
of driving loads down to 2 ohms. Each
channel operates independently and has its
own input connectors, sensitivity level
controls, signal indicator LEDS, limiter
circuitry, fault protection circuitry, power
amp, and speaker outputs.
2 t o 8 oh m s r a n g e
2 t o 8 oh m s r a n g e
In Stereo Mode, the STEREO/MONO
SWITCHE must be in the "STEREO"
position. Either the binding posts or the
Phone jacks may be used to connect the
amplifier to the speakers. Both inputs must be
active (plugged) in stereo mode; either XLR
input, RCA input, or the Phone J ack input
can be used.
From audio source
The two internal power amplifiers may be
bridged together to form a single, higher-
powered amp. In the Bridged Mono Mode,
the amplifier uses channel # 1 INPUT jacks
and LEVEL CONTROL; channel # 2 inputs
are disconnected. Channel # 2 power amp
receives its signal from channel # 1 input
This signal is connected to channel 2 prior to
its Limiter, so each channel is independently
protected. The STEREO/MONO SWITCH
must be in the MONO position. Because both
channels are being used (bridged in series),
the minimum load impedance is 4 ohms.
From audio source
The RED binding post terminals (ch
1= "+ ", ch 2= " + ") or the middle Phone jack
(ch # 1) must be used to connect the amplifier
to the speakers.
From audio source
4 t o 8 oh m s r a n g e
NOTE: Use both
Red Terminals ONLY
in Mono Mode
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PA-600 AM P LIFIER OP ERATION
The following diagrams are excerpts from the
system block diagrams and are intended to
provide a simplified view of the operating modes
of the amplifier.
Stereo Mode:
RCA# 2
RING
TIP
2
BRIDGE MONO SWITCH: This switch connects
the channels to work together for more power
output. With the switch in "MONO" Mode the
amplifier is in the Bridge Mono Mode. In the
Bridge Mono Mode, connect input to Channel 1
(Channel 2's inputs are disconnected). Both amp
channel are internally bridged together to create a
single-channel amplifier of increased output power.
CH 2
INPUTS
CH 2
LEVEL
3
+
STEREO
STEREO
CH 2
AMP
STEREO
1
PARALLEL
MONO
BRIDGE
MONO
BRIDGE
MONO
CH 2 OUTPUTS
1+
BRIDGE
MONO
2-
RCA# 1
RING
1+
2-
Use the two red BINDING POSTS (labeled
"M on o/B i a m p ") or p i n s 1+ /2+ of t h e
BIAMP/MONO (middle) Phone jack.
TIP
2
CH 1
LEVEL
CH 1
AMP
CH 1
INPUTS
CH 1 OUTPUTS
3
+
1
Bridge Mono Mode:
RCA# 2
RING
TIP
2
CH 2
CH 2
INPUTS
+
LEVEL
STEREO
3
STEREO
CH 2
AMP
STEREO
PARALLEL
MONO
BRIDGE
MONO
1
CH 2 OUTPUTS
BRIDGE
MONO
1+
2-
BRIDGE
MONO
RCA# 1
RING
1+
2-
TIP
CH 1
LEVEL
CH 1
AMP
2
CH 1
CH 1 OUTPUTS
INPUTS
3
+
1
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PA-600 AM P LIFIER INSTALLATION & M OUNTING
Th e P A-600 is specifica lly d esign ed to be r a ck m ou n ted , eith er a s a per m a n en t
fixtu r e or in "m obile" r a ck. As with a n y la r ge, h ea vy object, a pr oper
a
in sta lla tion cou ld m ea n th e d iffer en ce between su ccess a n d d isa ster . Th e fr on t of
th e u n it is d esign ed to a tta ch to sta n d a r d r a ck r a ils. Th e fou r ou ter m ost h oles
cor r espon d to th e scr ew on sta n d a r d r a ck r a ils (2 r a ck spa ces in h eigh t). Use on ly
10-32 th r ea d ed r a ck scr ews with la r ge h ea d s (su ch a s a tr u ss h ea d s). Th e u se of
n ylon r a ck m ou n t wa sh er s between th e scr ew h ea d s a n d th e fa cepla te will keep
th e fa cepla te fr om bein g scr a tch ed . Du e to th e d epth a n d weigh t of th e P A-600 a
set of r ea r su ppor t h oles h a ve been pr ovid ed . It is h igh ly r ecom m en d ed th a t th e
in sta ller u se th ese h oles to su ppor t th e r ea r of th e a m plifier . A su ppor t r a il, sh elf,
or br a cket ca n be a tta ch ed to th e a m plifier a n d th en to th e in sta lla tion
en closu r e. On e th ou gh t to keep in m in d wh en con sid er in g th e r ela ted h a r d wa r e
for th is: m or e is better wh en it com es to a secu r e in sta lla tion - a little extr a tim e
spen t on in sta llin g a h ea vy object m or e th a n offsets th e possible losses th a t
cou ld be in cu r r ed if th e object wer e to be d a m a ged d u e to in a d equ a te su ppor t.
Th e d im en sion s below a r e pr ovid ed to a ssist you a n d /or you r in sta lla tion
en gin eer in m ou n tin g th e a m plifier secu r ely.
17.06"
433.3mm
INDICATES CENTER OF GRAVITY
15.43"
392mm
1.54"
39.1mm
19.00"
482.6mm
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PA-600 AM P LIFIER SP ECIFICATIONS
P OWER OUTP UT
2 x 120 wa tts RMS @ 8 oh m s 20Hz-20kHz (ster eo m od e)
2 x 200 wa tts RMS @ 4 oh m s 20Hz-20kHz (ster eo m od e)
2 x 300 wa tts RMS @ 2 oh m s 1kHz (ster eo m od e)
380 wa tts RMS @ 8 oh m s 20Hz-20kHz (m on o m od e)
600 wa tts RMS @ 4 oh m s 1kHz (m on o m od e)
+0/-0.5d B, 20Hz-20kHz
FREQUENCY RESP ONSE
TOTAL HARMONIC DISTORTION
<0.05%, 20Hz-20kHz
SLEW RATE
40 volts / m icr osecon d
> 89d B r ef 200 wa tts /4 oh m s (20kHz equ iva len t ba n d wid th )
2 oh m s or gr ea ter in ster eo m od e
SIGNAL TO NOISE RATIO
LOAD IMP EDANCE
4 oh m s or gr ea ter in m on o m od e
DAMP ING FACTOR
CONTROLS
Typica l 300 (1kHz, 8 oh m s)
Two Fr on t pa n el level settin g kn obs, on e power switch
XLR, RCA a n d 1/4" ph on e (tip/r in g/sleeve), on e ea ch ch a n n el
Bin d in g posts ea ch ch a n n el, P h on e ja cks(on e ea ch ch a n n el)
Mon o Br id ge m od e select, Lim iter "on "/"off"
Sh or t cir cu it, open cir cu it, RF bu r n ou t, over tem p, spea ker pr otection r ela ys,
tu r n on /off tr a n sien t pr otection , DC pr otection , lim iter cir cu itr y
Va r ia ble speed for ced a ir fa n coolin g r ea r /sid e in ta ke, fr on t exh a u st
110 VAC 60Hz, 750VA
INP UT CONNECTIONS
OUTP UT CONNECTIONS
MODE SWITCHES
P ROTECTION CIRCUITRY
COOLING
P OWER REQUIREMENTS
100-120 VAC 50/60Hz, 750VA
220-240 VAC 50/60Hz, 750VA
SIZE AND WEIGHT
19" W x 3.49" H x 15.43" D; 29 lbs.
482.6m m W x 88.8m m H x 392m m D; 13.2 Kg.
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5-YEAR LIM ITED WARRANTY
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 isinstalled bya non-authorized party, a ninety(90) dayswarrantyperiod applies.
-
Subsequent damagetoother products.
A warranty claim will not be valid if the warranty registration card is not properly filled &
returned toEarthquakewith a copyofthesalesinvoice.
(E) ServiceRequest:
To receive product/s service, contact Earthquake service department at (510) 732-
1000 and request an RMA number (Return Material Authorization), 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 thephone, thuseliminating theneed toship theproduct.
(A) Five(5) yearslimited warrantyplan coverageguidelines:
-
First year: Earthquakepaysfor labor, parts, and ground freight (onlyin
U S
mainland, not including Alaska 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 for
partsand freight both ways.
(F) ShippingInstructions:
Product/s must be packaged in its original protective boxe/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 bill of sale 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 Cone Avenue, Hayward, CA 94545. Ph (510) 732-1000. You are
responsiblefor thecost ofshippingtheproduct toEarthquakeSound Corporation.
(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 to
customer.
(G) DisputesResolution:
(C) Earthquake agrees to repair or replace - at our option - all such defective products/parts
subject tothefollowing provisions:
All disputes - between clients and Earthquake Sound Corporation - resulting from
the five (5) years limited warranty policy must be resolved according to the laws &
regulationsofthecountyofAlameda -California.
-
Defectiveproducts/partshavenot been altered or repaired byother than
a
n
Earthquakefactoryapproved 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 or removed, or have been used in
anywaythat iscontrarytoEarthquake'swritten instructions.
(D) WarrantyLimitations:
Earthquake warranty does not cover products that have been modified or abused. Including
but not limited tothefollowing:
-
Damagestospeaker cabinet and cabinet finish duetomisuse, abuse, or
u s e
ofimproper useofcleaning materials/methods.
-
-
-
Bent speaker frame, broken speaker connectors, holes in speaker cone, surround &
dust cap, burnt speaker voicecoil.
Fading, deterioration of speaker components & finish due to improper exposure to
elements.
Bent amplifier casing, damaged finish on the casing due to abuse, misuse, or
improper useofcleaning material.
-
-
Burnt tracerson PCB.
Product/part damaged duetopoor packaging or abusiveshippingconditions.
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WARRANTY REGISTRATION CARD
Required Information:
Apply Serial Number H ere
First name:___________________________________________________________________________
Last name:___________________________________________________________________________
Street address:________________________________________________________________________
____________________________________________________________________________________
City:_________________________________________State:_______________ Zip:______________
Phone number: (_______)______________________________________________________________
Model number:_______________________________________________________________________
Date of purchase:_____________________________________________________________________
Purchase price:_______________________________________________________________________
Serial number: _______________________________________________________________________
Dealer name:_________________________________________________________________________
Dealer address:_______________________________________________________________________
_____________________________________________________________________________________
City:______________________________________ State:________________ Zip:_________________
Signature:____________________________________________________ Date:_________________
Your Comments: ______________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
5
YEARS
LIMITED
Hawaii)
WARRANTY
(Valid In U.S. Mainland Only- Excluding Alaska
&
|