Pyramid Car Audio PB-638GX, PB-738GX, PB-1838GX, PB-1038GX, PB-238GX User Manual

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Pyramid Car Audio PB-638GX, PB-738GX, PB-1838GX, PB-1038GX, PB-238GX User Manual

-1838GX PB-738GX

-238GX PB-638GX PB-1038GX

USER'S MANUAL

www.pyramidcaraudio.com

congratulations...

on your purchase of a Pyramid Royal Blue Series amplifier. This amplifier extends the Pyramid tradition into a totally new series of amps, designed from the ground up to deliver the power, performance and flexibility the modern car audio enthusiast demands.

When you check the list of features offered by the PB-238GX, PB-638GX, PB-738GX, PB-1038GX, PB1838GX, you’ll know you made the right choice with a Pyramid Power amplifier.

table of contents

general features 2-3

features and specifications

PB-238GX 4-5

PB-738GX 6-7 PB-1838GX

PB-638GX/PB-1038GX 8-9

electrical connections

PB-238GX 10-11 PB-638GX/PB-738GX PB-1038GX/PB-1838GX

stereo input connections

PB-738GX/PB-1838GX 12

mono input connections

PB-738GX/PB-1838GX 13

2/4 channel input connections

PB-238GX 14-15

high level input connections

PB-638GX/PB-1038GX 16-17

mono input connections

PB-638GX/PB-1038GX 18

high level mono input connections

PB-638GX/PB-1038GX 19

speaker connections

1

PB-738GX/PB-1838GX 20

speaker connections

PB-238GX/PB-638GX/PB-1038GX 21-22

mounting and installation

23

protection circuitry and troubleshooting

24

precautions

25

PB-238GX

High Performance 400 Watt 4 Channel Amplifier

·100 Watts x 4 Output

·Variable Input Level (Gain) Control

·Remote Turn On/Off

·Gold Plated RCA Inputs

·High Level MOLEX Inputs

·Power ON LED Indicator

·S/N Ratio: > 95 dB

·THD: <0.04%

·Overload Protection

·Short Circuit Protection

·Anti-Thump Turn-On

general features

PB-638GX

PB-738GX

 

High Performance 1600 Watt 4 Channel

High Performance 1000 Watt 2 Channel

 

Bridgeable MOSFET Amplifier

Bridgeable MOSFET Amplifier

 

· 400 Watts x 4 Output

· 500 Watts x 2 Output

 

· 800W x 2 Bridged Output (400W x 2 + 800W x 1)

· 1000W x 1 Bridged Output

 

· Dual Variable Hi/Lo Electronic Crossover Network

· Variable Hi/Lo Electronic Crossover Network

 

· Dual Variable Bass Boost (0 - +18 dB @ 60Hz)

· Variable Bass Boost (0 - +18 dB @ 60Hz)

 

· Variable Input Level (Gain) Control

· Variable Input Level (Gain) Control

2

· Remote Turn On/Off

· Remote Turn On/Off

 

· Gold Plated RCA Inputs

· Gold Plated RCA Inputs

 

· High Level MOLEX Inputs

· High Level MOLEX Inputs

 

· Power ON LED Indicator

· Power ON LED Indicator

 

· LED Protection Indicator

· LED Protection Indicator

 

· Remote Bass Boost

· Remote Bass Boost

 

· S/N Ratio: > 95 dB

· S/N Ratio: > 95 dB

 

· THD: <0.04%

· THD: <0.04%

 

· Thermal Protection

· Thermal Protection

 

· Overload Protection

· Overload Protection

 

· Short Circuit Protection

· Short Circuit Protection

 

· Anti-Thump Turn-On

· Anti-Thump Turn-On

 

· Tri-Mode Configurable

 

 

 

general features

 

PB-1038GX

PB-1836GX

 

High Performance 4000 Watt 4 Channel

High Performance 3000 Watt 2 Channel

 

Bridgeable MOSFET Amplifier

Bridgeable MOSFET Amplifier

 

· 1000 Watts x 4 Output

· 1500 Watts x 2 Output

 

· 2000 Watts x 2 Bridged Output(1000Wx2+2000Wx1)

· 3000W x 1 Bridged Output

 

· Dual Variable Hi/Lo Electronic Crossover Network

· Variable Hi/Lo Electronic Crossover Network

 

· Dual Variable Bass Boost (0 - +18 dB @ 60Hz)

· Variable Bass Boost (0 - +18 dB @ 60Hz)

 

· Variable Input Level (Gain) Control

· Variable Input Level (Gain) Control

 

· Remote Turn On/Off

· Remote Turn On/Off

3

· Gold Plated RCA Inputs

· Gold Plated RCA Inputs

· High Level MOLEX Inputs

· High Level MOLEX Inputs

 

· Power ON LED Indicator

· Power ON LED Indicator

 

· LED Protection Indicator

· LED Protection Indicator

 

· Remote Bass Boost

· Remote Bass Boost

 

· S/N Ratio: > 95 dB

· S/N Ratio: > 95 dB

 

· THD: <0.04%

· THD: <0.04%

 

· Thermal Protection

· Thermal Protection

 

· Overload Protection

· Overload Protection

 

· Short Circuit Protection

· Short Circuit Protection

 

· Anti-Thump Turn-On

· Anti-Thump Turn-On

 

· Tri-Mode Configurable

high level inputs low level inputs input level control

speaker connections

features and controls

4 ch amp PB-238GX

 

 

 

 

4 CHANNEL POWER AMPLIFIER

 

 

 

 

power LED

 

 

 

LOW IN

LOW IN

 

 

 

 

 

CH 4

CH 3

CH 2

CH 1

 

 

 

 

HI

IN

 

LEVEL

LEVEL

 

HI

IN

 

 

 

 

 

 

 

CH4 CH3

POWER

 

 

CH2 CH1

+

-

-

+

 

+

-

-

+

 

 

 

 

 

 

MIN MAX

MIN MAX

 

 

 

 

4

 

 

 

 

 

 

 

 

 

FUSE

REM

 

CH1

 

CH2

 

CH3

 

CH4

 

 

+

-

+

-

+

-

+

 

-

GROUND

+12V BATT

 

 

 

high level inputs low level inputs input level control

power terminals

power fuse

features and specifications

input level control use this control to match the outputs of your head unit to the amplifier. Starting with your head unit set at about the 2 o’clock position, increase the amp level control until distortion begins to occur, and reduce slightly from this point.

low level inputs this amp features gold-plated RCA input jacks for high impedance input. Use these with car stereo output which uses RCA-type connector cables.

high level inputs if your car stereo lacks RCA-type output jacks, you may connect speaker output leads to these input connectors.

power LED this indicator is illuminated when power is applied.

power fuse the fuse protects the amplifier and your car’s electrical system from short circuit conditions.

power terminals use these connectors to deliver power, ground and remote turn-on control to the amplifier.

speaker connections these terminals are 14K gold plated to guarantee high conductivity and minimum signal loss.

4 ch amp PB-238GX

output power @ 14.4v DC, 1KHz

 

 

RMS Power @ 4 Ohms

30 Watts x 4

 

Maximum Power Output

100 Watts x 4

 

frequency response

15 Hz-30 KHz

 

input impedance

 

 

low level inputs

10K Ohms

 

high level inputs

100 Ohms

 

input sensitivity

 

5

low level inputs

250mV

high level inputs

2.5V

power supply voltage

14.4V DC Neg. Ground (10.5-16V)

 

matching speaker impedance

 

 

stereo mode

2-4 Ohms

 

bridged mode

4-8 Ohms

 

maximum current draw

10A

 

dimensions (W x H x L)

 

 

mm

274 x 61 x 235

 

inches

10.8 x 2.4 x 9.25

 

features and controls

2 ch amp PB-738GX • PB-1238GX

power LED

 

 

 

 

 

 

 

 

 

 

 

protection LED

2 CHANNEL MOSFET AMPLIFIER

 

 

 

 

 

BASS BOOST

 

 

 

 

 

 

 

 

L

 

 

REMOTE

 

 

 

 

 

 

 

 

 

 

 

HPF

 

LPF

 

BASS

 

 

LEVEL

 

 

Remote Bass Boost

 

 

BOOST

FREQ.

 

 

HI IN

PROTECT POWER

 

 

 

 

 

 

 

R

+R - - L+

 

 

 

 

 

 

 

 

 

80

2.5k

35

400

0

+18db

HPF

MIN

MAX

 

 

 

 

Hz

 

Hz

 

 

LPF

 

 

LOW IN

 

 

 

 

 

 

FULL

 

 

 

high pass frequency control low pass frequency control bass boost level

crossover mode selector

 

 

 

 

 

FUSE

REM

 

L

 

R

 

 

 

 

 

GROUND

+12V BATT

+

-

+

 

-

 

 

 

speaker connections

 

 

 

 

 

 

+

BRIDGED

 

-

 

 

6

high level inputs low level inputs input level control

power terminals

power fuse

features and specifications

crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings.

input level controls use these controls to match the outputs of your head unit to the amplifier. Starting with your head unit set at about the 2 o’clock position, increase the amp level controls until distortion begins to occur, and reduce slightly from this point.

low pass frequency controls when one or both of the crossover selector switches is in “low pass” mode, one can set the upper frequency limit for audio program sent to the speakers.

high pass frequency controls when the one or both of crossover selector switch is in “high pass” mode, one can set the lower frequency limit for audio program sent to the speakers.

Remote Bass Boost Plug in the Remote Bass Boost Control wire in here.

bass boost level controls this control permits adjustment of the bass level up to an increase of approximately 18 dB in either or both pairs of channels.

2 ch amp PB-738GX • PB-1838GX

output power @ 14.4v DC, 1KHz

PB-738GX

PB-1838GX

 

 

 

 

 

 

 

 

 

RMS Power @ 4 Ohms

75 Watts x 2

150 Watts x 2

RMS Power @ 2 Ohms

125 Watts x 2

250 Watts x 2

Maximum Power Output

500 Watts x 2

1500 Watts x 2

frequency response

 

 

15 Hz-30 KHz

 

 

 

 

 

 

 

 

input impedance

 

 

 

 

 

 

 

 

 

low level inputs

 

 

10K Ohms

 

 

 

 

 

 

 

 

high level inputs

 

 

100 Ohms

 

 

 

 

 

 

 

 

input sensitivity

 

 

 

7

 

 

 

 

 

 

 

 

 

low level inputs

 

 

 

250mV

 

 

 

 

 

 

 

 

high level inputs

 

 

 

2.5V

 

 

 

 

 

 

 

 

power supply voltage

 

14.4V DC Neg. Ground (10.5-16V)

 

 

 

 

low level inputs this amp features gold-plated RCA input jacks for high impedance input. Use these with car stereo output which uses RCA-type connector cables.

high level inputs if your car stereo lacks RCA-type output jacks, you may connect speaker output leads to these input connectors.

power LED this indicator is illuminated when power is applied.

protection LED this indicator is illuminated when built-in protection circuitry is activated.

power fuse the fuse protects the amplifier and your car’s electrical system from short circuit conditions.

power terminals use these connectors to deliver power, ground and remote turn-on control to the amplifier.

speaker connections these terminals are 14K gold plated to guarantee high conductivity and minimum signal loss.

matching speaker impedance

 

 

 

 

stereo mode

 

2-4 Ohms

 

 

 

 

 

bridged mode

 

4-8 Ohms

 

 

 

 

 

maximum current draw

20 A

 

40 A

dimensions (W x H x L)

 

 

 

 

mm

274 x 61x 305

274 x 61 x 432

inches

10.8 x 2.4 x 12

10.8 x 2.4 x 12

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