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congratulations...
On your purchase of a Pyramid Signature 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 PB744,PB844 and PB1644, you’ll know you
made the right choice with a Pyramid Power
amplifier.
precautions
Do not operate the amplifier when it is unmounted,
Attach all audio system components securely within
the automobile to prevent damage, especially in an
accident.
Do not mount this amplifier so that the wire connections
are unprotected, or in a pinched condition, or likely to be
damaged by nearby objects.
.
Before making or breaking power connections in your system,
disconnect the vehicle battery. Confirm that your head unit or
other equipment is turned off while connecting the input jacks
and speaker terminals.
If you need to replace the power fuse, do so only with a fuse
identical to that supplied with the amplifier. Using a fuse of a
different type or rating may result in damage that isn’t covered
in the manufacturer’s warranty.
notes
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protection
circuitry
The built-in protection circuitry in the Pyramid
Signature amplifiers will disable the ampl ifier i f it
senses an input overload, a speaker short
circuit, or extreme temperature conditions.
When the protection circuit is activated by any
of these conditions, the Protection LED will be
illuminated.
If thi s occurs ,carefully inspect the system to
determine the source of the problem.
If the s hutdown was a result of a thermal overload
condition, allow the amplifier to cool down be fore
attempting to restart it.
If the s hutdown was a result of an input overload,
or speaker short circuit, be sure to corr the
condition before restarting.
The amplifier can be restarted by turning the
remote power OFF and then ON again.
troubleshooting
No out pu t.
No out pu t.
Conf ir m th at all terminal s tr ip c onnections ar e se cu re and tight.
Chec k bo th i n-line and buil t- in f uses. Both the +1 2V a nd the Remote ter mi na ls
must h av e +1 2V referenced t o ch as sis ground.
Conf ir m th at the audio sign al s ou rce(car radio , eq ualizer, etc.) I s co nn ected
and is s up pl ying output sig na l. To ch ec k if t he amp is supplyi ng s ig nal, unplug
the ca bl es f rom the signal so ur ce (but leave them p lu gged into the amp ).
Brie fl y ta p the center pin of e ac h of t he disconnect ed R CA pl ugs with your f in ge r.
This s ho ul d produce a noise )f ee dback) in you r sp ea kers.
Only o ne c ha nnel works.
Conf ir m th at all terminal s tr ip c onnections ar e se cu re and tight.
Conf ir m th at all terminal s tr ip c onnections ar e se cu re and tight.
Chec k th e Ba lance control o n th e he ad unit(or othe r so urce) to verify t ha t it
is set t o it s mi dpoint.
If you a re u si ng the Low Level RC A inp ut , r everse the inpu t pl ugs at the
ampl if ie r(i.e.,swit ch t he L with the R) . If t he c hannels which i s si le nt switches
to the o th er s ide, the proble m is e it her in the head uni t/ ot her source or t he
conn ec ti ng cables.
Weak output.
Read ju st t he Input Level Co nt ro l(s) to better su it t he i nput signal .
Nois e in t he a udio.
If the n oi se i s a “whine” whose p it ch f ollows the engi ne s peed, confirm t ha t
the am pl if ier and any other s ig na l sources(hes d un it, etc.) Are prop er ly g round.
If the n oi se i s a “clicking” or “ po pp ing” noise whos e ra te follows the en gi ne
spee d, t hi s usually means t ha t th e vehicle is equi pp ed with resisto r sp ar k
plug s an d wi res, or that the ig ni ti on is in need of serv ic e.
Chec k th e ro uting of the spea ke r an d input wires to ma ke s ur e they are not
adja ce nt t o wire which inte rc on nect lights and o th er accessorie s.
If the a bo ve s teps fail to impr ov e or c lear noise inte rf er ence, the sys te m
shou ld b e ch ecked by a profes si on al mobile aud io i ns taller.
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24
table of contents
general features
features and speifications
2ch amp PB744
4ch amp PB844
4ch amp PB1644
electrical connections
2ch amp PB744
4ch amp PB844
4ch amp PB1644
stereo input connections
2CH amp PB744
mono input connections
2CH amp PB744
2/4 channel input connections
4CH amp PB844 PB1644
2
3- 4
5- 6
7- 8
9
10
11
12
13
14
mono input connections
4CH amp PB844 PB1644
speaker connections
2ch amp PB744
4CH amp PB844
4CH amp PB844
mounting and installation
protection circuitry and troubleshooting
precautions
15
16
17-18
19-20
21
22
23
1
1
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general features
PB744
High Performance 1000Watt 2 channel
Bridgeable MOSFET Amplifier
．
．
500 Wa tts×2 Outpu t
．
．
100 0 Watts×1 Bridged O utput
．
．
Variabl e Hi/Lo Elec troni c Cross over Ne twork
．
．
Variabl e Bass Boost (0-+1 8dB@6 0Hz)
．
．
Variabl e Input Leve l(Gai n)Con trol
．
．
Rem ote Turn o n/Off
．
．
RCA In puts
．
．
．
．
Pow er ON LED I ndica tor
．
．
LED P rotec tion In dicat or
．
．
S/N R atio: > 95dB
．
．
THD : <0.04 %
．
．
The rmal Pr otect ion
．
．
Ove rload P rotec tion
．
Sho rt Circ uit Pro tecti on
．
Ant i-Thu mp Turn- On
PB844
High Performance 1600Watt 4 channel
Bridgeable MOSFET Amplifier
．
．
400 Wa tts×4 Output
．
．
800 Wa tts× 2 Bridged Ou tput (4 00W×2+800W×1) 200 0 Watts× 2 Bridged O utput ( 100W×2+20 00 W×1)
．
．
Variabl e Hi/Lo Elec troni c Cross over Ne twork
．
．
Variabl e Bass Boost (0-+1 8dB@6 0Hz)
．
．
Variabl e Input Leve l(Gai n)Con trol
．
．
Rem ote Turn o n/Off
．
．
RCA In puts
． ．
． ．
Mul tiFun tion VF DMul tiFun tion VF D Mul tiFun tion VF D
．
．
Pow er ON LED I ndica tor
．
．
LED P rotec tion In dicat or
．
．
S/N R atio: > 95dB
．
．
THD : <0.04 %
．
．
The rmal Pr otect ion
．
．
Ove rload P rotec tion
．
．
Sho rt Circ uit Pro tecti on
．
．
Ant i-Thu mp Turn- On
PB1644
High Performance 4000Watt 4 channel
Bridgeable MOSFET Amplifier
．
．
100 0 Watts×4 Outp ut
．
．
．
．
Variabl e Hi/Lo Elec troni c Cross over Ne twork
．
．
Variabl e Bass Boost (0-+1 8dB@6 0Hz)
．
．
Variabl e Input Leve l(Gai n)Con trol
．
．
Rem ote Turn o n/Off
．
．
RCA In puts
．
．
Pow er ON LED I ndica tor
．
．
LED P rotec tion In dicat or
．
．
S/N R atio: > 95dB
．
．
THD : <0.04 %
．
．
The rmal Pr otect ion
．
．
Ove rload P rotec tion
．
．
Sho rt Circ uit Pro tecti on
．
．
Ant i-Thu mp Turn- On
2
mounting and installation
Your new Pyramid Signature Series amplifier comes complete with required mounting hardware.
When determining a suitable location in your vehicle for the amp, please remember that it is a highpower electronic device capable of generating high heat.
For this reason,
ventilation, a minimum of dust, and no moisture.
always choose a location in your vehicle which has low vibration,
Be sure to mount the amp
Be sure to mount the amp
to allow reasonable airflow over the cooling fins.
Mark the location for the mounting screw holes by positioning the amp where you
it and use a scribe (or one of the mounting screws) inserted in each of the mounting holes to mark
by positioning the amp where you
the mounting surface for the mounting surface. If the mounting surface is carpeted, measure the
hole centers and mark with a felt tip pen.
Before attempting to drill the mounting holes, take note of any wires, lines or otherdevices
in your vehicle which may be located behind the mounting surface!
mounting surface for the mounting screws and insert them. Tighten the screws securely.
When making electrical connections to your amplifier, please observe the following:
Use at least 8 gauge wire for power and ground connections.
Wire the amplifier directly to the car battery.
For the ground connection, use the shortest possible wire to a good chassis ground point.
Wire the Remote connection to the auto start lead of your head unit, equalizer or power antenna.
About power fuses:
Pyramid Signature Series amplifiers feature built-in fuse systems. These fuses protect both the
amplifier and the electrical system in your vehicle from fault conditions. If you ever need to replace
the fuse in your Pyramid Signature Series amp, use a fuse of exactly the same type and rating. A
different type or rating of fuse may result in damage or fire.
in such a manner as
in such a manner as
wish to install
wish to install
drill pilot holes in the
Then
adequate
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PB1644
speaker connections
4ch amp PB1644
2CH Bridged Output Mode With Subwoofer Output
MINIMUN
SPEAKER
IMPEDANCE
4OHMS!
SUBWOOFER
L
SPEAKERS
R
20
PB744
PB1217
protection LED
low level inputs
power LED
high pass frequency control
low pass frequency control
speaker connections
SPEAKER OUTPUT
features and controls
2ch amp PB744
output level
remote bass boost
input level control
bass boost level
crossover mode selector
power fuse
power terminals
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features and specifications
2ch amp PB744
crossover mode selector
input level control
low pass frequency control
high pass frequency control
bass boost level control
low level inputs
remote bass boost
power LED
protection LED
power fuse
power terminals
connections
speaker
when used with normal, full range systems, set this switch to “FULL”. If
you wish 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 you head unit to the amplifier.
Starting with
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 upper frequency limit for audio program sent to the speakers.
this control permits
approximately 18 dB.
this amp features gold-plate RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
Plug in the Remote Bass Control wire in here.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is
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.
your head unit set at about the 2 o’clock position, increase
adjustment of the bass level up to an increase of
activated.
output power@14.4v DC, 1KHz
RMS Power @ 4 ohms
RMS
Power @ 2 ohms
Maximun Power
frequency response
power supply voltage
matching speaker impedance
maximum current draw
dimensions(W×H×L)
Output
input impedance
low level inputs
high level inputs
input sensitivity
low level inputs
stereo mode
bridged mode
mm
inches
50Wa tts×2
100Watts×2
250Watts×2
10Hz-70KHz
10K Ohms
100 Ohms
200 mV
14.4V DC Neg.Ground (10.5-16V)
2-4 Ohms
4-8 Ohms
15A×2
292×48×251
11.7×1.92×10.0
4
PB1644
4CH Output Mode
L
FRONT speaker
Bridged Dual Mono Output Mode
L
speaker
speaker connections
4ch amp PB1644
R
L
R
REAR speaker
MINIMUN
SPEAKER
IMPEDANCE
4OHMS!
R
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PB844
speaker connections
4ch amp PB844
2CH Bridged Output Mode with Subwoofer Output
R
SUBWOOFER
L
speakers
18
MINIMUN
SPEAKER
IMPEDANCE
4OHMS!
PB844
CH1/2 low pass frequency control
CH1/2 high pass frequency control
protection LED
CH1/2 input level control
CH3/4 input level control
power LED
CH3/4 high pass frequency control
CH3/4 low pass frequency control
CH3/4 crossover mode selector control
CH3/4 speaker connections
CH 1/2speaker connections
features and controls
4ch amp PB844
CH1/2 crossover mode selector switch
CH1/2 bass boost level control
CH1/2 level inputs
2/3/4 channel selectorl switch
output level
remote bass boost
CH3/4 level inputs
CH3/4 bass boost level control
power fuse
power terminals
5
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crossover mode selector
low pass frequency control
high pass frequency control
PB844
bass boost level control
input level control
low level inputs
high level inputs
power LED
protection LED
power fuse
power terminals
speaker connections
features and specifications
4ch amp PB844
when used with normal, full range systems, set this switch to “FULL”. If
you wish the internal crossover to power a driver of specific frequency
range , use the “LOWPASS” or “HIGHPASS” settings.
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 upper frequency limit for audio program sent to the
use this control to match the outputs of you head unit to the amplifier.
Starting with
the amp level control until distortion begins to occur, and reduce slightly
from this point.
this amp features gold-plate 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
this control permits adjustment of the bass level up to an increase of
approximately 18 dB.
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
minimum signal loss.
your head unit set at about the 2 o’clock position, increase
leads to these input connectors.
are 14K gold plated to guarantee high conductivity and
speakers.
output power@14.4v DC, 1KHz
RMS Power @ 4 ohms
RMS Power @ 2 ohms
Maximum Power Output
frequency response
input impedance
low level inputs
high level inputs
input sensitivity
low level inputs
power supply voltage
speaker impedance
matching
stereo mode
bridged mode
maximum current draw
dimensions(W×H×L)
mm
inches
75Watts×4
180Watts×4
250Watts×4
10Hz-70KHz
10K Ohms
100 Ohms
200mV
6
14.4V DC Neg.Ground (10.5-16V)
2-4 Ohms
4-8 Ohms
25A×2
292×48×360
11.7×1.92×14.5
PB844
4ch Output Mode
L
FRONT speaker
R
Bridged Dual Mono Output Mode
L
speaker connections
4ch amp PB844
R
REAR speaker
L
MINIMUN
SPEAKER
IMPEDANCE
speaker
R
4OHMS!
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Page 8
Stereo Output Mode
speaker connections
2ch amp PB744
SPEAKER OUTPUT
PB744
RIGHT speaker
LEFT speaker
Bridged Mono Output Mode
SPEAKER OUTPUT
speaker speaker
16
features and controlsfeatures and controls
4ch amp PB1644
PB1617X
PB1644
CH1/2 low pass frequency control
CH1/2 high pass frequency control
protection LED
CH1/2 input level control
CH3/4 input level control
power LED
CH3/4 high pass frequency control
CH3/4 low pass frequency control
CH3/4 crossover mode selector control
CH3/4 speaker connections
CH 1/2speaker connections
CH1/2 crossover mode selector switch
CH1/2 bass boost level control
CH1/2 level inputs
2/3/4 channel selectorl switch
output level
remote bass boost
CH3/4 level inputs
CH3/4 bass boost level control
power fuse
power terminals
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Page 9
crossover mode selector
crossover mode selector
low pass frequency control
low pass frequency control
high pass frequency control
high pass frequency control
PB844
PB1644
bass boost level control
bass boost level control
input level control
input level control
low level inputs
low level inputs
high level inputs
high level inputs
power LED
power LED
protection LED
protection LED
power fuse
power fuse
power terminals
power terminals
speaker connections
speaker connections
features and specifications
features and specifications
4ch amp PB1644
when used with normal, full range systems, set this switch to “FULL”. If
when used with normal, full range systems, set this switch to “FULL”. If
you wish the internal crossover to power a driver of specific frequency
you wish the internal crossover to power a driver of specific frequency
range , use the “LOWPASS” or “HIGHPASS” settings.
range , use the “LOWPASS” or “HIGHPASS” settings.
when the crossover selector switch is in “low pass” mode, this control
when the crossover selector switch is in “low pass” mode, this control
sets the upper frequency limit for audio program sent to the speakers.
sets the upper frequency limit for audio program sent to the speakers.
when the crossover selector switch is in “high pass” mode, this control
when the crossover selector switch is in “high pass” mode, this control
sets the upper frequency limit for audio program sent to the
sets the upper frequency limit for audio program sent to the
use this control to match the outputs of you head unit to the amplifier.
use this control to match the outputs of you head unit to the amplifier.
Starting with
Starting with
the amp level control until distortion begins to occur, and reduce slightly
the amp level control until distortion begins to occur, and reduce slightly
from this point.
from this point.
this amp features gold-plate RCA input jacks for high impedance input.
this amp features gold-plate RCA input jacks for high impedance input.
Use these with car stereo output which uses RCA-type connector cables.
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
if your car stereo lacks RCA-type output jacks, you may connect speaker
output
output
this control permits adjustment of the bass level up to an increase of
this control permits adjustment of the bass level up to an increase of
approximately 18 dB.
approximately 18 dB.
this indicator is illuminated when power is applied.
this indicator is illuminated when power is applied.
this indicator is illuminated when built-in protection circuitry is activated.
this indicator is illuminated when built-in protection circuitry is activated.
the fuse protects the amplifier and your car’s electrical system from short
the fuse protects the amplifier and your car’s electrical system from short
circuit conditions.
circuit conditions.
use these connectors to deliver power, ground and remote turn-on control
use these connectors to deliver power, ground and remote turn-on control
to the amplifier.
to the amplifier.
these terminals
these terminals
minimum signal loss.
minimum signal loss.
your head unit set at about the 2 o’clock position, increase
your head unit set at about the 2 o’clock position, increase
leads to these input connectors.
leads to these input connectors.
are 14K gold plated to guarantee high conductivity and
are 14K gold plated to guarantee high conductivity and
speakers.
speakers.
R
output power@14.4v DC, 1KHz
RMS Power @ 4 ohms
RMS Power @ 2 ohms
Maximum Power Output
frequency response
input impedance
low level inputs
high level inputs
input sensitivity
low level inputs
power supply voltage
power supply voltage
matching speaker
maximum current draw
maximum current draw
dimensions(W×H×L)
dimensions(W×H×L)
impedance
stereo mode
bridged mode
mm
mm
inches
inches
100Watts×4
200Watts×2
500Watts×4
10Hz-70KHz
10K Ohms
100 Ohms
200mV
14.4V DC Neg.Ground (10.5-16V)
2-4 Ohms
4-8 Ohms
80A
222×48×450
8.88×1. 92×18.1
8
6
PB317X
PB844
PB717X
PB1644
4ch amp PB844 PB1644
4ch mono input connections using low level inputs
LEFT FRONT Audio Outputs
LEFT REAR Audio Outputs
2ch mono minput connections using low level inputs
RIGHT REAR Audio Outputs
RIGHT FRONT Audio Outputs
L
Y adaptors
R
mono connections
head unit
96.8
head unit
96.8
15
16
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PB417X
PB844
PB617X
PB1644
2/4 channel input connections
4ch amp PB844 PB1644
4ch input connections using low level inputs
L/R FRONT
Audio Outputs
2ch input connections using low level inputs
L/R REAR
Audio Outputs
Y adaptors
head unit
96.8
head unit
L
R
96.8
14
17
PB417X
PB744
SPEAKER OUTPUT
electrical connections
2ch amp PB744
+12V battery
head unit
96.8
to remote turn-on +12V
9
8
Page 11
electrical connections
4ch amp PB844
PB844
10
+12V battery
head unit
96.8
to remote turn-on +12V
mono input connections
2ch amp PB744
using low level inputs
PB744
To a sencond amplifier
Y Adaptors
96.8
head unit
13
PLEASE NOTE! If using high level inputs,
do not use the low level RCA inputs at the
same time!
Page 12
PB744
L/R Audio
Outputs
stereo input connections
2ch amp PB744
12
head unit
96.8
PLEASE NOTE! If using high level inputs,
do not use the low level RCA inputs at the
same time!
PB1644
+12V battery
head unit
electrical connections
4ch amp PB1644
96.8
to remote turn-on +12V
11
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