Pyramid Signature Series Amplifiers
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
Page 23
Protection Circuitry and Troubleshooting
Protection Circuitry
The built-in protection circuitry in the Pyramid Signature amplifiers will disable the amplifier if 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 this occurs, carefully inspect the system to determine the source of the problem.
If the shutdown was a result of a thermal overload condition, allow the amplifier to cool down before attempting to restart it.
If the shutdown was a result of an input overload, or speaker short circuit, be sure to correct the condition before restarting.
The amplifier can be restarted by turning the remote power OFF and then ON again.
Troubleshooting: No Output
Confirm that all terminal strip connections are secure and tight.
Check both in-line and built-in fuses. Both the +12V and the Remote terminals must have +12V referenced to chassis ground.
Confirm that the audio signal source (car radio, equalizer, etc.) is connected and is supplying output signal. To check if the amp is supplying signal, unplug the cables from the signal source (but leave them plugged into the amp). Briefly tap the center pin of each of the disconnected RCA plugs with your finger. This should produce a noise (feedback) in your speakers.
Troubleshooting: Only One Channel Works
Confirm that all terminal strip connections are secure and tight.
Check the Balance control on the head unit (or other source) to verify that it is set to its midpoint.
If you are using the Low Level RCA input, reverse the input plugs at the amplifier (i.e., switch the L with the R). If the channels which is silent switches to the other side, the problem is either in the head unit/other source or the connecting cables.
Troubleshooting: Weak Output
Readjust the Input Level Control(s) to better suit the input signal.
Troubleshooting: Noise in the Audio
If the noise is a "whine" whose pitch follows the engine speed, confirm that the amplifier and any other signal sources (head unit, etc.) are properly grounded.
If the noise is a "clicking" or "popping" noise whose rate follows the engine speed, this usually means that the vehicle is equipped with resistor spark plugs and wires, or that the ignition is in need of service.
Check the routing of the speaker and input wires to make sure they are not adjacent to wire which interconnect lights and other accessories.
If the above steps fail to improve or clear noise interference, the system should be checked by a professional mobile audio installer.
Page 22
General Features
| Feature | PB744 | PB844 | PB1644 |
|---|---|---|---|
| Type | High Performance 1000Watt 2 channel Bridgeable MOSFET Amplifier | High Performance 1600Watt 4 channel Bridgeable MOSFET Amplifier | High Performance 4000Watt 4 channel Bridgeable MOSFET Amplifier |
| Output (2 Channel) | 500 Watts x 2 | 400 Watts x 4 | 1000 Watts x 4 |
| Output (Bridged) | 1000 Watts x 1 | 800 Watts x 2 (400W x 2 + 800W x 1) | 2000 Watts x 2 (100W x 2 + 2000W x 1) |
| Crossover | Variable Hi/Lo Electronic Crossover Network | Variable Hi/Lo Electronic Crossover Network | Variable Hi/Lo Electronic Crossover Network |
| Bass Boost | Variable Bass Boost (0-+18dB@60Hz) | Variable Bass Boost (0-+18dB@60Hz) | Variable Bass Boost (0-+18dB@60Hz) |
| Input Level | Variable Input Level (Gain) Control | Variable Input Level (Gain) Control | Variable Input Level (Gain) Control |
| Turn On | Remote Turn on/Off | Remote Turn on/Off | Remote Turn on/Off |
| Inputs | RCA Inputs | RCA Inputs | RCA Inputs |
| Display | MultiFuntion VFD | MultiFuntion VFD | MultiFuntion VFD |
| Indicators | Power ON LED Indicator, LED Protection Indicator | Power ON LED Indicator, LED Protection Indicator | Power ON LED Indicator, LED Protection Indicator |
| S/N Ratio | >95dB | >95dB | >95dB |
| THD | <0.04% | <0.04% | <0.04% |
| Protection | Thermal Protection, Overload Protection, Short Circuit Protection | Thermal Protection, Overload Protection, Short Circuit Protection | Thermal Protection, Overload Protection, Short Circuit Protection |
| Turn-On | Anti-Thump Turn-On | Anti-Thump Turn-On | Anti-Thump Turn-On |
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 high-power electronic device capable of generating high heat.
For this reason, always choose a location in your vehicle which has low vibration, adequate ventilation, a minimum of dust, and no moisture. Be sure to mount the amp in such a manner as to allow reasonable airflow over the cooling fins.
Mark the location for the mounting screw holes by positioning the amp where you wish to install it and use a scribe (or one of the mounting screws) inserted in each of the mounting holes to mark 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 other devices in your vehicle which may be located behind the mounting surface! Then drill pilot holes in the 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.
Page 21
Speaker Connections: 4ch amp PB1644
2CH Bridged Output Mode With Subwoofer Output
This mode allows for a 2-channel bridged configuration, suitable for driving a subwoofer. The diagram shows the PB1644 amplifier's speaker output terminals. The left channel speaker terminals (labeled '1CH +', '1CH -') are bridged together for one output, and the right channel speaker terminals ('2CH +', '2CH -') are bridged together for a second output. The diagram indicates that the minimum speaker impedance for bridged mode is 4 Ohms. The diagram shows connections for a subwoofer to the bridged '1CH +' and '2CH +' terminals.
Page 20
Features and Controls: 2ch amp PB744
The front panel of the PB744 amplifier features several controls and indicators:
- Protection LED: Illuminated when built-in protection circuitry is activated.
- Low Level Inputs: Gold-plated RCA input jacks for high impedance input, used with car stereo output using RCA-type connector cables.
- Power LED: Illuminated when power is applied.
- High Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers when the crossover selector is in "High Pass" mode.
- Low Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers when the crossover selector is in "Low Pass" mode.
- Speaker Connections: Terminals for connecting speakers.
- LINE INPUT: RCA jacks for audio input.
- LINE OUT: RCA jacks for outputting signal to another amplifier.
- HPF (High Pass Filter): Control for the high-pass filter.
- LPF (Low Pass Filter): Control for the low-pass filter.
- X-OVER MODE: Selector switch for crossover modes (e.g., FULL, LPF/BP).
- BASS EQ LEVEL: Control for adjusting bass boost level.
- LEVEL: Input level (gain) control to match head unit output.
- POWER: Indicates power status.
- REMOTE: Terminal for the remote turn-on wire.
- FUSE: Location for the power fuse.
- POWER INPUT: Terminals for +12V power and Ground.
- Output Level: Control for output level.
- Remote Bass Boost: Input for the remote bass control wire.
- Crossover Mode Selector: Switch to select crossover mode.
- Power Fuse: Location for the power fuse.
- Power Terminals: Terminals for power, ground, and remote turn-on.
Page 3
Features and Specifications: 2ch amp PB744
Crossover Mode Selector: When used with normal, full-range systems, set this switch to "FULL". If you wish the internal crossover to power a driver of a specific frequency range, use the "LOWPASS" or "HIGHPASS" settings.
Input Level Control: Use this control to match the outputs of your head unit to the amplifier. Start 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 Pass Frequency 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.
High Pass Frequency Control: When the crossover selector switch is in "HIGH PASS" mode, this control sets the upper frequency limit for audio program sent to the speakers.
Bass Boost Level Control: This control permits adjustment of the bass level up to an increase of approximately 18 dB.
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.
Remote Bass Boost: Plug in the Remote Bass Control wire here.
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.
| Specification | Value |
|---|---|
| Output Power @ 14.4V DC, 1KHz | |
| RMS Power @ 4 Ohms | 50 Watts x 2 |
| RMS Power @ 2 Ohms | 100 Watts x 2 |
| Maximum Power Output | 250 Watts x 2 |
| Frequency Response | 10Hz-70KHz |
| Input Impedance (Low Level Inputs) | 10K Ohms |
| Input Impedance (High Level Inputs) | 100 Ohms |
| Input Sensitivity (Low Level Inputs) | 200 mV |
| Power Supply Voltage | 14.4V DC Neg. Ground (10.5-16V) |
| Matching Speaker Impedance (Stereo Mode) | 2-4 Ohms |
| Matching Speaker Impedance (Bridged Mode) | 4-8 Ohms |
| Maximum Current Draw | 15A x 2 |
| Dimensions (W x H x L) - mm | 292 x 48 x 251 |
| Dimensions (W x H x L) - inches | 11.7 x 1.92 x 10.0 |
Page 4
Speaker Connections: 4ch amp PB1644
4CH Output Mode
This mode connects speakers to individual channels. The diagram shows the PB1644 amplifier's speaker output terminals. For the front speakers, the '1CH +' and '1CH -' terminals are used for one speaker, and '2CH +' and '2CH -' for another. For the rear speakers, '3CH +' and '3CH -' are used for one, and '4CH +' and '4CH -' for another. The diagram indicates the minimum speaker impedance is 4 Ohms for each connection.
Bridged Dual Mono Output Mode
This mode allows bridging of channels for higher power output. The diagram shows the PB1644 amplifier's speaker output terminals. For example, '1CH +' and '2CH -' can be bridged to drive a single speaker with increased power. Similarly, '3CH +' and '4CH -' can be bridged. The diagram indicates the minimum speaker impedance is 4 Ohms for bridged connections.
Page 19
Speaker Connections: 4ch amp PB844
2CH Bridged Output Mode with Subwoofer Output
This mode is designed for bridging two channels to drive a subwoofer. The diagram shows the PB844 amplifier's speaker output terminals. The '1CH +' and '2CH -' terminals are bridged together for one output. The '3CH +' and '4CH -' terminals are bridged together for a second output. The diagram indicates that the minimum speaker impedance for bridged mode is 4 Ohms. The diagram shows connections for a subwoofer to the bridged '1CH +' and '2CH -' terminals.
Page 18
Features and Controls: 4ch amp PB844
The front panel of the PB844 amplifier features several controls and indicators:
- CH1/2 Low Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 1 and 2 when the crossover selector is in "Low Pass" mode.
- CH1/2 High Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 1 and 2 when the crossover selector is in "High Pass" mode.
- Protection LED: Illuminated when built-in protection circuitry is activated.
- CH1/2 Input Level Control: Matches the outputs of the head unit to the amplifier for channels 1 and 2.
- CH1/2 Crossover Mode Selector Switch: Selects crossover modes for channels 1 and 2 (e.g., FULL, LPF/BP).
- CH1/2 Bass Boost Level Control: Adjusts the bass level for channels 1 and 2.
- CH1/2 Level Inputs: RCA jacks for audio input for channels 1 and 2.
- 2/3/4 Channel Selector Switch: Selects the number of active channels or modes.
- CH3/4 Input Level Control: Matches the outputs of the head unit to the amplifier for channels 3 and 4.
- Power LED: Illuminated when power is applied.
- CH3/4 High Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 3 and 4 when the crossover selector is in "High Pass" mode.
- CH3/4 Low Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 3 and 4 when the crossover selector is in "Low Pass" mode.
- CH3/4 Crossover Mode Selector Control: Selects crossover modes for channels 3 and 4.
- CH3/4 Speaker Connections: Terminals for connecting speakers to channels 3 and 4.
- CH 1/2 Speaker Connections: Terminals for connecting speakers to channels 1 and 2.
- LINE INPUT: RCA jacks for audio input.
- LINE OUT: RCA jacks for outputting signal to another amplifier.
- HPF (High Pass Filter): Control for the high-pass filter.
- LPF (Low Pass Filter): Control for the low-pass filter.
- X-OVER MODE: Selector switch for crossover modes.
- BASS EQ LEVEL: Control for adjusting bass boost level.
- LEVEL: Input level (gain) control.
- POWER: Indicates power status.
- REMOTE: Terminal for the remote turn-on wire.
- Output Level: Control for output level.
- Remote Bass Boost: Input for the remote bass control wire.
- CH3/4 Level Inputs: RCA jacks for audio input for channels 3 and 4.
- CH3/4 Bass Boost Level Control: Adjusts the bass level for channels 3 and 4.
- Power Fuse: Location for the power fuse.
- Power Terminals: Terminals for power, ground, and remote turn-on.
Page 5
Features and Specifications: 4ch amp PB844
Crossover Mode Selector: When used with normal, full-range systems, set this switch to "FULL". If you wish the internal crossover to power a driver of a specific frequency range, use the "LOWPASS" or "HIGHPASS" settings.
Low Pass Frequency 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.
High Pass Frequency Control: When the crossover selector switch is in "HIGH PASS" mode, this control sets the upper frequency limit for audio program sent to the speakers.
Input Level Control: Use this control to match the outputs of your head unit to the amplifier. Start 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.
Bass Boost Level Control: This control permits adjustment of the bass level up to an increase of approximately 18 dB.
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.
| Specification | Value |
|---|---|
| Output Power @ 14.4V DC, 1KHz | |
| RMS Power @ 4 Ohms | 75 Watts x 4 |
| RMS Power @ 2 Ohms | 180 Watts x 4 |
| Maximum Power Output | 250 Watts x 4 |
| Frequency Response | 10Hz-70KHz |
| Input Impedance (Low Level Inputs) | 10K Ohms |
| Input Impedance (High Level Inputs) | 100 Ohms |
| Input Sensitivity (Low Level Inputs) | 200mV |
| Power Supply Voltage | 14.4V DC Neg. Ground (10.5-16V) |
| Matching Speaker Impedance (Stereo Mode) | 2-4 Ohms |
| Matching Speaker Impedance (Bridged Mode) | 4-8 Ohms |
| Maximum Current Draw | 25A x 2 |
| Dimensions (W x H x L) - mm | 292 x 48 x 360 |
| Dimensions (W x H x L) - inches | 11.7 x 1.92 x 14.5 |
Page 6
Speaker Connections: 4ch amp PB844
4CH Output Mode
This mode connects speakers to individual channels. The diagram shows the PB844 amplifier's speaker output terminals. For the front speakers, the '1CH +' and '1CH -' terminals are used for one speaker, and '2CH +' and '2CH -' for another. For the rear speakers, '3CH +' and '3CH -' are used for one, and '4CH +' and '4CH -' for another. The diagram indicates the minimum speaker impedance is 4 Ohms for each connection.
Bridged Dual Mono Output Mode
This mode allows bridging of channels for higher power output. The diagram shows the PB844 amplifier's speaker output terminals. For example, '1CH +' and '2CH -' can be bridged to drive a single speaker with increased power. Similarly, '3CH +' and '4CH -' can be bridged. The diagram indicates the minimum speaker impedance is 4 Ohms for bridged connections.
Page 17
Speaker Connections: 2ch amp PB744
Stereo Output Mode
This mode connects speakers to individual channels for stereo sound. The diagram shows the PB744 amplifier's speaker output terminals. The 'LEFT' speaker terminals (+ and -) are connected to the left speaker, and the 'RIGHT' speaker terminals (+ and -) are connected to the right speaker.
Bridged Mono Output Mode
This mode bridges the two channels for higher power output, typically for a subwoofer. The diagram shows the PB744 amplifier's speaker output terminals. The 'LEFT' and 'RIGHT' speaker terminals are bridged together (e.g., 'LEFT +' and 'RIGHT -') to drive a single speaker.
Page 16
Features and Controls: 4ch amp PB1644
The front panel of the PB1644 amplifier features several controls and indicators:
- CH1/2 Low Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 1 and 2 when the crossover selector is in "Low Pass" mode.
- CH1/2 High Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 1 and 2 when the crossover selector is in "High Pass" mode.
- Protection LED: Illuminated when built-in protection circuitry is activated.
- CH1/2 Input Level Control: Matches the outputs of the head unit to the amplifier for channels 1 and 2.
- CH1/2 Crossover Mode Selector Switch: Selects crossover modes for channels 1 and 2 (e.g., FULL, LPF/BP).
- CH1/2 Bass Boost Level Control: Adjusts the bass level for channels 1 and 2.
- CH1/2 Level Inputs: RCA jacks for audio input for channels 1 and 2.
- 2/3/4 Channel Selector Switch: Selects the number of active channels or modes.
- CH3/4 Input Level Control: Matches the outputs of the head unit to the amplifier for channels 3 and 4.
- Power LED: Illuminated when power is applied.
- CH3/4 High Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 3 and 4 when the crossover selector is in "High Pass" mode.
- CH3/4 Low Pass Frequency Control: Sets the upper frequency limit for audio program sent to speakers on channels 3 and 4 when the crossover selector is in "Low Pass" mode.
- CH3/4 Crossover Mode Selector Control: Selects crossover modes for channels 3 and 4.
- CH3/4 Speaker Connections: Terminals for connecting speakers to channels 3 and 4.
- CH 1/2 Speaker Connections: Terminals for connecting speakers to channels 1 and 2.
- LINE INPUT: RCA jacks for audio input.
- LINE OUT: RCA jacks for outputting signal to another amplifier.
- HPF (High Pass Filter): Control for the high-pass filter.
- LPF (Low Pass Filter): Control for the low-pass filter.
- X-OVER MODE: Selector switch for crossover modes.
- BASS EQ LEVEL: Control for adjusting bass boost level.
- LEVEL: Input level (gain) control.
- POWER: Indicates power status.
- REMOTE: Terminal for the remote turn-on wire.
- Output Level: Control for output level.
- Remote Bass Boost: Input for the remote bass control wire.
- CH3/4 Level Inputs: RCA jacks for audio input for channels 3 and 4.
- CH3/4 Bass Boost Level Control: Adjusts the bass level for channels 3 and 4.
- Power Fuse: Location for the power fuse.
- Power Terminals: Terminals for power, ground, and remote turn-on.
Page 7
Features and Specifications: 4ch amp PB1644
Crossover Mode Selector: When used with normal, full-range systems, set this switch to "FULL". If you wish the internal crossover to power a driver of a specific frequency range, use the "LOWPASS" or "HIGHPASS" settings.
Low Pass Frequency 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.
High Pass Frequency Control: When the crossover selector switch is in "HIGH PASS" mode, this control sets the upper frequency limit for audio program sent to the speakers.
Input Level Control: Use this control to match the outputs of your head unit to the amplifier. Start 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.
Bass Boost Level Control: This control permits adjustment of the bass level up to an increase of approximately 18 dB.
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.
| Specification | Value |
|---|---|
| Output Power @ 14.4V DC, 1KHz | |
| RMS Power @ 4 Ohms | 100 Watts x 4 |
| RMS Power @ 2 Ohms | 200 Watts x 2 |
| Maximum Power Output | 500 Watts x 4 |
| Frequency Response | 10Hz-70KHz |
| Input Impedance (Low Level Inputs) | 10K Ohms |
| Input Impedance (High Level Inputs) | 100 Ohms |
| Input Sensitivity (Low Level Inputs) | 200mV |
| Power Supply Voltage | 14.4V DC Neg. Ground (10.5-16V) |
| Matching Speaker Impedance (Stereo Mode) | 2-4 Ohms |
| Matching Speaker Impedance (Bridged Mode) | 4-8 Ohms |
| Maximum Current Draw | 80A |
| Dimensions (W x H x L) - mm | 222 x 48 x 450 |
| Dimensions (W x H x L) - inches | 8.88 x 1.92 x 18.1 |
Page 8
Mono Connections: 4ch amp PB844 / PB1644
4ch Mono Input Connections using Low Level Inputs
This section describes connecting the amplifier for mono operation using low-level RCA inputs. The diagram shows a head unit with multiple audio outputs (e.g., Right Rear, Right Front, Left Front, Left Rear). These outputs are connected to the amplifier's LINE INPUT RCA jacks. A Y-adaptor is shown connecting multiple outputs to a single input on the amplifier, suggesting a configuration for mono input for multiple channels or a specific setup. The diagram shows the PB844 and PB1644 amplifiers.
2ch Mono Input Connections using Low Level Inputs
This section describes connecting the amplifier for mono operation using low-level RCA inputs. The diagram shows a head unit with stereo audio outputs (Left and Right). These are connected to the amplifier's LINE INPUT RCA jacks, potentially using Y-adaptors to combine them for mono input. The diagram shows the PB744 amplifier.
Page 15
2/4 Channel Input Connections: 4ch amp PB844 / PB1644
4ch Input Connections using Low Level Inputs
This section details connecting the amplifier for 4-channel operation using low-level RCA inputs. The diagram shows a head unit with separate Left/Right Front and Left/Right Rear audio outputs. These are connected to the amplifier's LINE INPUT RCA jacks, typically using four separate RCA cables. The diagram shows the PB844 and PB1644 amplifiers.
2ch Input Connections using Low Level Inputs
This section details connecting the amplifier for 2-channel operation using low-level RCA inputs. The diagram shows a head unit with stereo audio outputs (Left and Right). These are connected to the amplifier's LINE INPUT RCA jacks, typically using two separate RCA cables. A Y-adaptor is shown, possibly for bridging or specific configurations. The diagram shows the PB744 amplifier.
Page 14
Electrical Connections: 2ch amp PB744
This section illustrates the power, ground, and remote connections for the PB744 amplifier.
- +12V Battery: A thick wire connects from the vehicle's +12V battery terminal to the amplifier's '+12V' power input terminal.
- Ground: A thick wire connects from the vehicle's chassis ground to the amplifier's 'GND' terminal.
- Remote Turn-on: A thinner wire connects from the head unit's remote turn-on output (+12V) to the amplifier's 'REM' terminal.
The diagram shows the PB744 amplifier with these connections clearly labeled.
Page 9
Electrical Connections: 4ch amp PB844
This section illustrates the power, ground, and remote connections for the PB844 amplifier.
- +12V Battery: A thick wire connects from the vehicle's +12V battery terminal to the amplifier's '+12V' power input terminal.
- Ground: A thick wire connects from the vehicle's chassis ground to the amplifier's 'GND' terminal.
- Remote Turn-on: A thinner wire connects from the head unit's remote turn-on output (+12V) to the amplifier's 'REM' terminal.
The diagram shows the PB844 amplifier with these connections clearly labeled.
Page 10
Mono Input Connections: 2ch amp PB744
This section describes connecting the PB744 amplifier for mono operation using low-level RCA inputs.
The diagram shows a head unit with stereo audio outputs (Left and Right). These are connected to the amplifier's LINE INPUT RCA jacks. A Y-adaptor is used to combine the Left and Right outputs from the head unit into a single mono input for the amplifier. The diagram also shows an optional connection to a second amplifier via the LINE OUT jacks.
Note: If using high-level inputs, do not use the low-level RCA inputs at the same time.
Page 13
Stereo Input Connections: 2ch amp PB744
This section illustrates connecting the PB744 amplifier for stereo operation using low-level RCA inputs.
The diagram shows a head unit with stereo audio outputs (L/R Audio Outputs). These are connected directly to the amplifier's LINE INPUT RCA jacks (Left and Right). The diagram shows the PB744 amplifier.
Note: If using high-level inputs, do not use the low-level RCA inputs at the same time.
Page 12
Electrical Connections: 4ch amp PB1644
This section illustrates the power, ground, and remote connections for the PB1644 amplifier.
- +12V Battery: A thick wire connects from the vehicle's +12V battery terminal to the amplifier's '+12V' power input terminal.
- Ground: A thick wire connects from the vehicle's chassis ground to the amplifier's 'GND' terminal.
- Remote Turn-on: A thinner wire connects from the head unit's remote turn-on output (+12V) to the amplifier's 'REM' terminal.
The diagram shows the PB1644 amplifier with these connections clearly labeled.
Page 11
