Pyramid PB 610 SX User manual

COMPETITION AMPLIFIER
2-OHM STABILITY
OWNER’S MANUAL
PB 310 SX
PB 610 SX
PB 800 SX
PB 1000 SX

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Thank you for purchasing a Pyramid car audio amplifier.
Rest assured you have purchased a quality product designed and engi-
neered to give you many years of uncompromised musical service.
This amplifier has been designed using the latest in electronic technol-
ogy available today and will provide you with years and years of high quality
sound level amplification and reproduction.
This amplifier have been designed with a fully regulated 100% MOSFET
Power supplies assuring extremely quick switching response and self pro-
tection with soft starting power turn on.
A FEW WORDS ABOUT PROTECTION CIRCUITRY.
Advanced protection circuits have been designed into all Pyramid
amplifiers. The protection circuitry will disable the amplifier if it senses an
input overload, speaker short circuit short or extreme high temperature
conditions.
When the protection circuit is in operation the LED indicator on the unit
will light indicating that the amplifier has gone into a self preservation mode.
At this time please check your system to see what is causing the protec-
tion circuit to fire. The amplifier can be reset by turning the remote power off
and then on again. If the system shuts down because of a thermal over-
load condition, allow the amplifier to cool down before restarting. If the
amplifier shutdown because of an input overload or speaker short circuit
please be sure to correct these conditions before restarting the amplifier.
INTRODUCTION PYRAMID SERIES

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This unit was designed to operate efficiently at loads down to 2 ohms.
What this means is that you can do an installation of FOUR-8 ohm speak-
ers per channel using parallel wiring or TWO-4 ohm speakers per channel
in parallel.
When operating at 2 ohms, the amplifier to increase their power output
by approximately 50 percent. The current draw of the amplifiers will also
increase by about the same as amount. Be sure that you have enough
current to run the amplifier into a 2 ohm load otherwise distorted music will
be reproduced.
Do not use a 2 ohm load in the bridged mode.
The amplifier accepts 4-8 ohms only in the bridged mode.
2-OHM OPERATION PYRAMID SERIES

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FEATURES PYRAMID SERIES
PB 310 SX
•TWO CHANNEL BRIDGEABLE AMPLIFIER
•300 WATTS X 2 OUTPUT
•600 WATTS X 1 BRIDGED OUTPUT
•VARIABLE GAIN CONTROL
•REMOTE TURN ON/OFF
•2 OHM STEREO STABLE
•MOSFET PULSE WIDTH MODULATED POWER SUPPLY
•VARIABLE BASS BOOST ( 0-18 dB @ 60HZ)
•VARIABLE TREBLE BOOST (0-12 dB @ 10KHZ)
•GOLD PLATED RCA HIGH IMPEDANCE INPUTS
•SPEAKER TERMINAL BARRIER STRIP
•SOFT TURN-ON CIRCUIT
•HEAVY DUTY ALUMINUM ALLOY HEATSINK
•DC TO DC CONVERTER CIRCUITRY
•POWER ON & DIAGNOSTIC LED INDICATOR
•SIGNAL TO NOISE RATIO: GREATER THAN 90dB
•DISTORTION: LESS THAN 0.05% @RMS POWER
•FREQUENCY RESPONSE : 10HZ-30KHZ
•INPUT SENSITIVITY: 100MV-1V ADJUSTABLE
•INPUT IMPEDANCE: 10K OHMS
•OVERLOAD PROTECTION
•THERMAL SHUTDOWN
•DIMENSIONS: 209MM(L) X 242MM(W) X 64MM(H)

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FEATURES PYRAMID SERIES
PB 610 SX
•FOUR CHANNEL BRIDGEABLE AMPLIFIER
•250 WATTS X 4 OUTPUT OR
•500 WATTS X 2 BRIDGED OR
•250 WATTS X 2 + 1 X 500 W
•VARIABLE GAIN CONTROL
•REMOTE TURN ON/OFF
•2 OHM STEREO STABLE
•TWIN MOSFET PULSE WIDTH MODULATED POWER SUPPLIES
•VARIABLE BASS BOOST ( 0-18 dB @ 60HZ)
•VARIABLE TREBLE BOOST (0-12 dB @ 10KHZ)
•GOLD PLATED RCA HIGH IMPEDANCE INPUTS
•SPEAKER TERMINAL BARRIER STRIP
•SOFT TURN-ON CIRCUIT
•HEAVY DUTY ALUMINUM ALLOY HEAT SINK
•DC TO DC CONVERTER CIRCUITRY
•POWER ON & DIAGNOSTIC LED INDICATOR
•SIGNAL TO NOISE RATIO: GREATER THAN 90dB
•DISTORTION: LESS THAN 0.05% @RMS POWER
•FREQUENCY RESPONSE : 10HZ-30KHZ
•INPUT SENSITIVITY: 100MV-1V ADJUSTABLE
•INPUT IMPEDANCE: 10K OHMS
•OVERLOAD PROTECTION / SHORT CIRCUIT PROTECTION
•THERMAL SHUTDOWN
•DIMENSIONS: 350MM(L) X 242MM(W) X 64MM(H)

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FEATURES PYRAMID SERIES
PB 800 SX
•FOUR CHANNEL BRIDGEABLE AMPLIFIER
•300 WATTS X 4 OUTPUT OR
•600 WATTS X 2 BRIDGED OR
•300 WATTS X 2 + 1 X 600 W
•VARIABLE GAIN CONTROL
•REMOTE TURN ON/OFF
•2 OHM STEREO STABLE
•TWIN MOSFET PULSE WIDTH MODULATED POWER SUPPLIES
•VARIABLE BASS BOOST ( 0-18 dB @ 60HZ)
•VARIABLE TREBLE BOOST (0-12 dB @ 10KHZ)
•GOLD PLATED RCA HIGH IMPEDANCE INPUTS
•SPEAKER TERMINAL BARRIER STRIP
•SOFT TURN-ON CIRCUIT
•HEAVY DUTY ALUMINUM ALLOY HEAT SINK
•DC TO DC CONVERTER CIRCUITRY
•POWER ON & DIAGNOSTIC LED INDICATOR
•SIGNAL TO NOISE RATIO: GREATER THAN 90dB
•DISTORTION: LESS THAN 0.05% @RMS POWER
•FREQUENCY RESPONSE : 10HZ-30KHZ
•INPUT SENSITIVITY: 100MV-1V ADJUSTABLE
•INPUT IMPEDANCE: 10K OHMS
•OVERLOAD PROTECTION / SHORT CIRCUIT PROTECTION
•THERMAL SHUTDOWN
•REMOTE BASS BOOST
•DIMENSIONS: 380MM(L) X 242MM(W) X 64MM(H)

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FEATURES PYRAMID SERIES
PB1000 SX
•FOUR CHANNEL BRIDGEABLE AMPLIFIER
•400 WATTS X 4 OUTPUT OR
•800 WATTS X 2 BRIDGED OR
•400 WATTS X 2 + 1 X 800 W
•VARIABLE GAIN CONTROL
•REMOTE TURN ON/OFF
•2 OHM STEREO STABLE
•TWIN MOSFET PULSE WIDTH MODULATED POWER SUPPLIES
•VARIABLE BASS BOOST ( 0-18 dB @ 60HZ)
•VARIABLE TREBLE BOOST (0-12 dB @ 10KHZ)
•GOLD PLATED RCA HIGH IMPEDANCE INPUTS
•SPEAKER TERMINAL BARRIER STRIP
•SOFT TURN-ON CIRCUIT
•HEAVY DUTY ALUMINUM ALLOY HEAT SINK
•DC TO DC CONVERTER CIRCUITRY
•POWER ON & DIAGNOSTIC LED INDICATOR
•SIGNAL TO NOISE RATIO: GREATER THAN 90dB
•DISTORTION: LESS THAN 0.05% @RMS POWER
•FREQUENCY RESPONSE : 10HZ-30KHZ
•INPUT SENSITIVITY: 100MV-1V ADJUSTABLE
•INPUT IMPEDANCE: 10K OHMS
•OVERLOAD PROTECTION / SHORT CIRCUIT PROTECTION
•THERMAL SHUTDOWN
•REMOTE BASS BOOST
•DIMENSIONS: 410MM(L) X 242MM(W) X 64MM(H)

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CONNECTIONS PB310SX
PB310SX STEREO MODE

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CONNECTIONS PB310SX
PB310SX BRIDGED MODE
SPEAKERS NEGATIVE TERMINALS ON AMPLIFIER ARE NOT USED IN BRIDGED
MODE BRIDGING IS DONE BY SUMMING POSITIVES.
CONNECT THE NEGATIVE SPEAKER TERMINAL TO THE POSITIVE TERMINAL OF
CH2 (R-CH) ON THE AMPLIFIER BE SURE TO SELECT BRIDGED SWITCH KNOB FOR
PROPER OPERATION.
CAR SIGNAL INPUT (RCA LINE OUT) MUST BE CONNECTED TO ONLY EACH "L"
CHANNEL (BRIDG SWITCH KNOB SHOULD BE SELECTED MO). IF CAR SIGNAL
INPUT IS CONNECTED TO "R" CHANNEL THERE SHALL BE NO POWER OUT (NO
SOUND).
BRIDGED MODE INPUT WIRING

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CONNECTIONS PB610SX/ PB800SX/ PB1000SX
PB610SX/ PB800SX/ PB1000SX STEREO MODE
NOTE: REMOTE BASS BOOST IS A FEATURE OF PB800SX AND PB1000SX

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CONNECTIONS PB610SX/ PB800SX/ PB1000SX
PB610SX/ PB800SX/ PB1000SX BRIDGED MODE
A. TWO-SPEAKER SYSTEM

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CONNECTIONS PB610SX/ PB800SX/ PB1000SX
PB610SX/ PB800SX/ PB1000SX BRIDGED MODE
B. THREE-SPEAKER SYSTEM

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MECHANICAL INSTALLATION PYRAMID SERIES
Mark the locations for the mounting screw holes by holding the AMPLI-
FIER in place and using a scribe or one of the mounting screws inserted in
each mounting hole in turn to mark the mounting surface. If the mounting
surface in carpeted, measure the hole centers and mark with a felt-tip pen.
Drill pilot holes for the mounting screws into the holes of the system insert
the mounting screws into the holes and tighten them securely.
*WARNING*
Investigate the layout of your automobile thoroughly before drill-
ing or cutting any holes. Take care when you work near the gas tanks,
lines, or hydraulic lines, and electrical wiring. Don't use power ampli-
fier unmounted. Attach this system securely to the automobile to pre-
vent damage, particularly in the event of an accident.
Don't mount this system so that the wire connections are unpro-
tected or are subject to pinching or damage from nearby objects.
The +12VDC power wire must be fused at the battery positive termi-
nal connection. Before making or breaking power connections at this
system power terminals, disconnect the +12V wire at the battery end.
Confirm your radio/cassette player and/or other equip is turned off
while connecting the input jacks and speaker terminals.
If you need to replace the power fuse, replace it only with a fuse
identical to that supplied with the system. Using a fuse of different type
or rating may result in damage to this system which isn't covered by
the warranty.

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ELECTRICAL INSTALLATION PYRAMID SERIES
1. Connect the power ground terminal to the nearest point on the chassis
of the car keep this ground wire less than one meter(39") in length. Use
#8 wire.
2. Connect the remote terminal to the remote output of the head unit
using #14 wire.
3. Connect an empty fuse holder within 300mm (12") of the battery and
run a #8 or larger high quality cable from this fuse to the amplifier
location.
4. Make sure there is no fuse in the fuse holder. Then make the connec-
tion to the "BATT" connection on the amplifier.
5. If multiple amplifiers are being used, either run separate cables. (each
with its own fuse at the battery) or a #0 or #2 cable from the fuse holder
at the battery to a distribution block at or near the amplifier's location.
6. Connect all line inputs and outputs using high-quality RCA-RCA cables.
7. Insert fuse(s) at the battery fuse holder(s).
8. Recheck all connections before powering up.
9. Set all level controls to their least sensitive positions and set all crossover
controls, switches, etc. to the desired frequency or position.
10. Once the system is powered up, set the volume control on the head
unit to about the 2 o'clock position, and then set all the amplifiers, level
control for maximum sound pressure.
11. When bridging the amplifiers be sure to change the stereo/mono switch
knob to the in position for the appropriate channels to bridge.
12. Further fine turning of the various controls may be necessary to obtain
the desired results.
PLEASE NOTE:
The gain control of any car audio amplifier should not be mistaken for a
volume control. It is a sophisticated device to match the output level of
your source unit to the input level of the amplifier. Do not adjust the level to
maximum unless your input level requires it. Not following this instruction
will result in an input overload to the amplifier and high levels of distorted
musical reproduction.

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SPECIFICATIONS PYRAMID SERIES
PB310SX PB610SX PB800SX PB1000SX
RMS Power per channel 2 x 150 4 x 125 4 x 150 4 x 200
at 4 Ohms
Peak Power per channel 2 x 300 4 x 250 4 x 300 4 x 400
at 4 Ohms
Bridged power at 4 Ohms 1 x 600 2 x 500 2 x 600 2 x 800
RMS power per channel 2 x 200 4 x 175 4 x 250 4 x 350
at 2 Ohms
Minimum Speaker 2 OHM
Impedance
THD Less Than 0.05%
Frequency Response 10Hz ---- 30KHz (-3dB)
Input sensitivity 100mV ---- 1V
Input Impedance 10K OHM
Signal-to-Noise Ratio >90dB
Channel Separation >65dB
Treble boost 0 --12 dB (10KHz)
Bass boost 0 --18dB (60Hz)
Dimensions 242x64x209 242x64x350 242x64x380 242x64x410
(WxHxL) mm mm mm mm
FUSE 20A 20A x 2 20A x 2 25A x 2
BUILT-IN ELECTRONIC TREBLE & BASS
The TREBLE is adjustable form 0 ~ +12dB Boost at 10KHz
The BASS is adjustable from 0 ~ +18dB Boost at 60Hz
BASS FREQUENCY TREBLE FREQUENCY

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TROUBLE SHOOTING GUIDE PYRAMID SERIES
SYMPTOM:
Amp turning off at low
volume levels
No Sound
No Sound
No sound in one chan-
nel
Amp turning off at me-
dium or high volume
levels
CHECK:
Check speakers for dam-
age or short
Is the power LED illumi-
nated ?
Is the Diagnostic LED
illuminated?
Check speaker leads
Check Audio Leads
Check Mono Bridge and
Amp
Sub woofer Switches
Check speaker load im-
pedance
CURE:
Have your dealer inspect the speakers.
Check fuses in amplifier.
Be sure Turn-on lead is connected
Check signal leads. Check gain control.
Check Tuner/Deck volume level.
Clean contacts on fuse holders.
Check for speaker short or amplifier
overheating.
Inspect for short circuit or an open connection.
Reverse Left and Right RCA inputs to determine
if it is occurring before the amp.
Change switches to ensure proper position with
respect to the installation.
Be sure proper speaker load impedance rec-
ommendations are observed.
(If you use an ohmmeter to check speaker
resistance, please remember that DC resistance
and AC impedance may not be the same.)

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