Pyramid PB1045X User manual

congratulations...
on your purchase of a Pyramid Royal Red 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 5X, PB5 5X, PB6 5X, PB8 5X, PB9 5X, PB10 5X
and PB18 5X, you’ll know you made the right
choice with a Pyramid Power amplifier.

table of contents
1
mounting and installation 25
protection circuitry and troubleshooting 26
19
20
22
23-24
21
speaker connections
PB645X/PB845X/1045X/1845X
speaker connections
PB445X/545X/ 45X
high level mono input connections
PB645X/PB845X/1045X/1845X
mono input connections
PB645X/PB845X/1045X/1845X
high level input connections
PB645X/PB845X/1045X/1845X
electrical connections
PB445X/545X/ 45X 14
PB645X/PB845X/1045X/1845X 15
stereo input connections
PB445X/545X/ 45X 16
2/4 channel input connections
PB645X/PB845X/1045X/1845X 18
mono input connections
PB445X/545X/ 45X 17
features and specifications
PB445X 4-5
PB545X 6-7
PB 45X 8-9
PB645X/PB845X 10-11
general features 2-3
precautions 27
PB1045X/PB1845X 12-13

general features
2
· 300 Watts x 2 Output
· 600 Watts x 1 Bridged Output
· Variable Hi/Lo Electronic Crossover
Network
· Variable Bass Boost (0 - +18 dB @ 60Hz)
· Variable Input Level (Gain) Control
· Remote Turn On/Off
· Gold Plated RCA Inputs
· High Level MOLEX Input
· Power ON LED Indicator
· LED Protection Indicator
· S/N Ratio: > 95 dB
· THD: <0.04%
· Thermal Protection
· Overload Protection
· Short Circuit Protection
· Anti-Thump Turn-On
PB445X
High Performance 600 Watt 2 Channel
Bridgeable MOSFET Amplifier
· 400 Watts x 2 Output
· 800 Watts x 1 Bridged Output
· Variable Hi/Lo Electronic Crossover
Network
· Variable Bass Boost (0 - +18 dB @ 60Hz)
· Variable Input Level (Gain) Control
· Remote Turn On/Off
· Gold Plated RCA Inputs
· High Level MOLEX Input
· Power ON LED Indicator
· LED Protection Indicator
· Remote Bass Boost
· S/N Ratio: > 95 dB
· THD: <0.04%
· Thermal Protection
· Overload Protection
· Short Circuit Protection
· Anti-Thump Turn-On
PB545X
High Performance 800 Watt 2 Channel
Bridgeable MOSFET Amplifier
· 500 Watts x 2 Output
· 1000 Watts x 1 Bridged Output
· Variable Hi/Lo Electronic Crossover
Network
· Variable Bass Boost (0 - +18 dB @ 60Hz)
· Variable Input Level (Gain) Control
· Remote Turn On/Off
· Gold Plated RCA Inputs
· High Level MOLEX Input
· Power ON LED Indicator
· LED Protection Indicator
· Remote Bass Boost
· S/N Ratio: > 95 dB
· THD: <0.04%
· Thermal Protection
· Overload Protection
· Short Circuit Protection
· Anti-Thump Turn-On
PB945X
High Performance 1000 Watt 2 Channel
Bridgeable MOSFET Amplifier
· 250 Watts x 4 Output
· 500W x 2 Bridged Output (250Wx2+
500W x 1)
· Dual Variable Hi/Lo Electronic Crossover
Network
· Dual Variable Bass Boost (0 - +18 dB @
60Hz)
· Variable Input Level (Gain) Control
· Remote Turn On/Off
· Gold Plated RCA Inputs
· High Level MOLEX Inputs
· Power ON LED Indicator
· LED Protection Indicator
· S/N Ratio: > 95 dB
· THD: <0.04%
· Thermal Protection
· Overload Protection
· Short Circuit Protection
· Anti-Thump Turn-On
· Tri-Mode Configurable
PB645X
High Performance 1000 Watt 4 Channel
Bridgeable MOSFET Amplifier

general features
3
·300 Watts x 4 Output
·600W x 2 Bridged Output (300Wx2+600W x 1)
·Dual Variable Hi/Lo Electronic Crossover Network
·Dual Variable Bass Boost (0 - +18 dB @ 60Hz)
·Variable Input Level (Gain) Control
·Remote Turn On/Off
·Gold Plated RCA Inputs
·High Level MOLEX Inputs
·Power ON LED Indicator
·LED Protection Indicator
·Remote Bass Boost
·S/N Ratio: > 95 dB
·THD: <0.04%
·Thermal Protection
·Overload Protection
·Short Circuit Protection
·Anti-Thump Turn-On
·Tri-Mode Configurable
PB845X
High Performance 1200 Watt 4 Channel
Bridgeable MOSFET Amplifier
·500 Watts x 4 Output.
·1000Wx2Bridged Output ( 500Wx2+1000Wx1)
·Dual Variable Hi/Lo Electronic Crossover Network
·Dual Variable Bass Boost (0 - +18 dB @ 60Hz)
·Variable Input Level (Gain) Control
·Remote Turn On/Off
·Gold Plated RCA Inputs
·High Level MOLEX Inputs
·Power ON LED Indicator
·LED Protection Indicator
·Remote Bass Boost
·S/N Ratio: > 95 dB
·THD: <0.04%
·Thermal Protection
·Overload Protection
·Short Circuit Protection
·Anti-Thump Turn-On
·Tri-Mode Configurable
PB1845X
High Performance 2000 Watt 4 Channel
Bridgeable MOSFET Amplifier
·400 Watts x 4 Output
·800W x 2 Bridged Output (400Wx2+800W x 1)
·Dual Variable Hi/Lo Electronic Crossover Network
·Dual Variable Bass Boost (0 - +18 dB @ 60Hz)
·Variable Input Level (Gain) Control
·Remote Turn On/Off
·Gold Plated RCA Inputs
·High Level MOLEX Inputs
·Power ON LED Indicator
·LED Protection Indicator
·Remote Bass Boost
·S/N Ratio: > 95 dB
·THD: <0.04%
·Thermal Protection
·Overload Protection
·Short Circuit Protection
·Anti-Thump Turn-On
·Tri-Mode Configurable
PB1045X
High Performance 1600 Watt 4 Channel
Bridgeable MOSFET Amplifier

4
pb445X
features and controls
2 ch amp PB445X
high level inputs
input level control
crossover mode selector
speaker connections
protection LED
low pass frequency control
power terminals
power fuse
bass boost level
low level inputs power LED
high pass frequency control

5
features and specifications
2 ch amp PB 44 5X
frequency response
power supply voltage
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms
RMS Power @ 2 Ohms
Maximum Power Output
input sensitivity
low level inputs
high level inputs
40 Watts x 2
60 Watts x 2
300 Watts x 2
15 Hz-30 KHz
250mV
2.5V
14.4V DC Neg. Ground (10.5-16V)
crossover mode selector
input level control
low pass frequency control
high pass frequency control
bass boost level control
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
when used with normal, full range systems, set this switch to “FULL.” If
you wish to use the internal crossover to power a driver of specific frequency
range, use the “LOWPASS” or “HIGHPASS” settings.
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.
when the crossover selector switch is in “low pass” mode, this control
sets the upper frequency limit for audio program sent to the speakers.
when the crossover selector switch is in “high pass” mode, this control
sets the lower frequency limit for audio program sent to the speakers.
this control permits adjustment of the bass level up to an increase of
approximately 18 dB.
this amp features gold-plated RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
if your car stereo lacks RCA-type output jacks, you may connect speaker
output leads to these input connectors.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
these terminals are 14K gold plated to guarantee high conductivity and
minimum signal loss.
maximum current draw
dimensions (WxHxL)
mm
inches
2-4 Ohms
15A
4-8 Ohms
input impedance
low level inputs
high level inputs 10K Ohms
100 Ohms
matching speaker impedance
stereo mode
bridged mode
300x62x259
11.8 x 2.5 x 10.2

6
pb545X
features and controls
2 ch amp PB545X
high level inputs
input level control
crossover mode selector
speaker connections
Remote Bass Boost
low pass frequency control
power terminals
power fuse
bass boost level high pass frequency control
low level inputs
power LED
protection LED

7
features and specifications
2 ch amp PB 54 5X
crossover mode selector
input level control
low pass frequency control
high pass frequency control
bass boost level control
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
when used with normal, full range systems, set this switch to “FULL.”If
you wish to use the internal crossover to power a driver of specific frequency
range, use the “LOWPASS”or “HIGHPASS”settings.
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.
when the crossover selector switch is in “low pass”mode, this control
sets the upper frequency limit for audio program sent to the speakers.
when the crossover selector switch is in “high pass”mode, this control
sets the lower frequency limit for audio program sent to the speakers.
this control permits adjustment of the bass level up to an increase of
approximately 18 dB.
this amp features gold-plated RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
if your car stereo lacks RCA-type output jacks, you may connect speaker
output leads to these input connectors.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
these terminals are 14K gold plated to guarantee high conductivity and
minimum signal loss.
frequency response
power supply voltage
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms
RMS Power @ 2 Ohms
Maximum Power Output
input sensitivity
low level inputs
high level inputs
50 Watts x 2
80 Watts x 2
400 Watts x 2
15 Hz-30 KHz
250mV
2.5V
14.4V DC Neg. Ground (10.5-16V)
maximum current draw
dimensions (WxHxL)
mm
inches
2-4 Ohms
4-8 Ohms
input impedance
low level inputs
high level inputs 10K Ohms
100 Ohms
matching speaker impedance
stereo mode
bridged mode
20A
300x62x285
11.8 x 2.5 x 11.6

8
pb 45X
features and controls
2 ch amp PB 45X
high level inputs
input level control
crossover mode selector
speaker connections
Remote Bass Boost
low pass frequency control
power terminals
power fuse
bass boost level high pass frequency control
low level inputs power LED
protection LED

9
features and specifications
2 ch amp PB 4 5X
crossover mode selector
input level control
low pass frequency control
high pass frequency control
bass boost level control
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
when used with normal, full range systems, set this switch to “FULL.”If
you wish to use the internal crossover to power a driver of specific frequency
range, use the “LOWPASS”or “HIGHPASS”settings.
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.
when the crossover selector switch is in “low pass”mode, this control
sets the upper frequency limit for audio program sent to the speakers.
when the crossover selector switch is in “high pass”mode, this control
sets the lower frequency limit for audio program sent to the speakers.
this control permits adjustment of the bass level up to an increase of
approximately 18 dB.
this amp features gold-plated RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
if your car stereo lacks RCA-type output jacks, you may connect speaker
output leads to these input connectors.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
these terminals are 14K gold plated to guarantee high conductivity and
minimum signal loss.
frequency response
power supply voltage
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms
RMS Power @ 2 Ohms
Maximum Power Output
input sensitivity
low level inputs
high level inputs
80 Watts x 2
120 Watts x 2
500 Watts x 2
15 Hz-30 KHz
250mV
2.5V
14.4V DC Neg. Ground (10.5-16V)
maximum current draw
dimensions (WxHxL)
mm
inches
2-4 Ohms
4-8 Ohms
input impedance
low level inputs
high level inputs 10K Ohms
100 Ohms
matching speaker impedance
stereo mode
bridged mode
20A
300x62x355
11.8 x 2.5x 13.9

10
pb645X
pb845X
features and controls
4 ch amp PB645X • PB845X
ch 1/2 crossover mode selector switch
ch 1/2 bass boost level control
ch 1/2 input level control
ch 1/2 high pass frequency control
ch 1/2 low pass frequency control
ch 3/4 crossover mode selector switch
ch 3/4 bass boost level control
ch 3/4 input level control
ch 3/4 high pass frequency control
ch 3/4 low pass frequency control
ch 1/2 high level inputs
power LED
speaker connections
power fuse
protection LED ch 1/2 low level inputs
power terminals
ch 3/4 high level inputs
ch 3/4 low level inputs
Remote Bass Boost(PB645X without)

11
features and specifications
4 ch amp PB645X • PB845X
dual crossover mode selectors
dual input level controls
dual low pass frequency controls
dual high pass frequency controls
dual bass boost level controls
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
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.
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.
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.
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.
this control permits adjustment of the bass level up to an increase of
approximately 18 dB in either or both pairs of channels.
this amp features gold-plated RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
if your car stereo lacks RCA-type output jacks, you may connect speaker
output leads to these input connectors.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
these terminals are 14K gold plated to guarantee high conductivity and
minimum signal loss.
PB645X
4 channel amplifier
frequency response
power supply voltage
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms
RMS Power @ 2 Ohms
Maximum Power Output
input sensitivity
low level inputs
high level inputs
35 Watts x 4
55 Watts x 4
250 Watts x 4
15 Hz-30 KHz
250mV
2.5V
14.4V DC Neg. Ground (10.5-16V)
PB845X
4 channel amplifier
50 Watts x 4
60 Watts x 4
300 Watts x 4
maximum current draw
dimensions (WxHxL)
mm
inches
2-4 Ohms
4-8 Ohms
matching speaker impedance
stereo mode
bridged mode
input impedance
low level inputs
high level inputs 10K Ohms
100 Ohms
20 A 30 A
300x62x355
11.8 x 2.5 x 13.9 300x62x403 11.8 x 2.5 x 14.9

12
pb1045X
pb1845X
features and controls
4 ch amp PB 10 45X•PB 1 8 45X
ch 1/2 crossover mode selector switch
ch 1/2 bass boost level control
ch 1/2 input level control
ch 1/2 high pass frequency control
ch 1/2 low pass frequency control
ch 3/4 crossover mode selector switch
ch 3/4 bass boost level control
ch 3/4 input level control
ch 3/4 high pass frequency control
ch 3/4 low pass frequency control
ch 1/2 high level inputs
power LED
speaker connections
power fuse
protection LED ch 1/2 low level inputs
power terminals
ch 3/4 high level inputs
ch 3/4 low level inputs
Remote Bass Boost
speaker connections
power fuse
power terminals

13
features and specifications
4 ch amp PB1045X • PB1845X
dual crossover mode selectors
dual input level controls
dual low pass frequency controls
dual high pass frequency controls
dual bass boost level controls
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
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.
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.
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.
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.
this control permits adjustment of the bass level up to an increase of
approximately 18 dB in either or both pairs of channels.
this amp features gold-plated RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
if your car stereo lacks RCA-type output jacks, you may connect speaker
output leads to these input connectors.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
these terminals are 14K gold plated to guarantee high conductivity and
minimum signal loss.
PB1045X
4 channel amplifier
frequency response
power supply voltage
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms
RMS Power @ 2 Ohms
Maximum Power Output
input sensitivity
low level inputs
high level inputs
75 Watts x 4
110 Watts x 4
400 Watts x 4
15 Hz-30 KHz
250mV
2.5V
14.4V DC Neg. Ground (10.5-16V)
PB1845X
4 channel amplifier
125 Watts x 4
200 Watts x 4
500 Watts x 4
maximum current draw
dimensions (WxHxL)
mm
inches
2-4 Ohms
4-8 Ohms
matching speaker impedance
stereo mode
bridged mode
input impedance
low level inputs
high level inputs 10K Ohms
100 Ohms
40 A 50 A
300x62x475
11.8 x 2.5 x 18.7 300x62x499 11.8 x 2.5 x 19.6

to remote turn-on
+12V
head unit
12V battery
14
electrical connections
2 ch amp PB445X • PB545X • PB 45X
pb445X
pb545X
pb 45X

15
electrical connections
4 ch amp PB645X • PB845X • PB1045X• PB1845X
pb645X
pb845X
pb1045X
pb1845X
to remote turn-on
+12V
head unit
12V battery
to remote turn-on
+12V
head unit
12V battery
PB645X • PB845X • PB1045X
PB1845X

16
stereo input connections
2 ch amp PB445X • PB545X • PB 45X
pb445X
pb545X
pb 45X
using low level inputs
head unit
L/R Audio
Outputs
from spealer terminals
LL RR
using high level inputs
head unit
wiring harness
PLEASE NOTE! If using high
level inputs, do not use the
low level RCA inputs at the
same time!

17
mono input connections
2 ch amp PB445X • PB545X • PB 45X
pb445X
pb545X
pb 45X
head unit
using low level inputs
PLEASE NOTE! If using high
level inputs, do not use the
low level RCA inputs at the
same time!
using high level inputs
To a second amplifier
Y Adaptors
head unit
wiring harnesswiring harness
To a second amplifier RRLL
from spealer terminals

18
pb645X
pb845X
pb1045X
pb1845X
2/4 channel input connections
4 ch amp PB645X • PB845X • PB1045X• PB1845X
4 CH input connections using low level inputs
head unit
2 CH input connections using low level inputs
L/R FRONT
Audio Outputs
L/R REAR
Audio Outputs
Y adaptors
L
R

1 9
pb645X
pb845X
pb1045X
pb1845X
high level input connections
4 ch amp PB645X • PB845X • PB1045X• PB1845X
CH 1/2
4 CH floating ground connections
4 CH harness wiring for common ground connections
from speaker terminals
LRFRONT L R REAR
ORANGE
ORANGE
ORANGE
ORANGE
BLACK
BLACK
BLACK
BLACK
from speaker terminals
LRFRONT RL REAR
ORANGE
ORANGE
ORANGE
ORANGE
BLACK
BLACK
BLACK
BLACK
CH 3/4
PLEASE NOTE! If using high level
inputs, do not use the low level
RCA inputs at the same time!