If you want to get the maximum performance from your loudspeakers and subwoofers, definitely add a Polk PA D amplifier or two. We offer 2-channel, 4-channel, 5-channel and monoblocks. Each PA amp is styled lean and plays meaner, with enough big, fat juicy watts to drive your system so you get to hear all of your music, no matter where and how loud you like to play.

PA D5000.5 5 Channel Amplifier

Super efficient class D bridgable 5-channel mobile audio amplifier

The PA D5000.5 is capable of bridging two full-range channels into a single full-range channel with higher output power. For instance, the front channels (FL and FR) when wired correctly will increase the output power from 70W per channel to 200W per channel (for a 4 ohm load). The same can be done for the rear channels (RL and RR). The most common configurations are four full-range channels and a subwoofer channel, or two bridged full-range channels and a subwoofer channel.

RRP $799.00 AUD

Super-efficient class D design—Runs much cooler than conventional amps.

High-speed MOSFET switching—Power supply with outputs stable into 2 ohm loads for full range channel speakers and 1 ohm loads for subwoofer channel.

Protection—Thermal, DC offset, reverse DC voltage and short circuit protection.

Sub 1/Sub 2 Inputs—Line level inputs for subwoofer signal from head unit

SUB/INT source switch—In the INT position, the amplifier will filter the bass frequencies from the full range signal and send them to the subwoofer amplifier channel.

SUB sonic filter—Attenuates the frequencies below the settings on the control.

Remote bass level control—Set gain to match output from head unit.

Rear Full, HPF switch—Selects between no filtering or a high pass filter to dial in your speakers’ blending.

Channel mode switch (4CH/ST)—In the ST position, the amplifier sends the same signal to the front and rear channels.

Nickel-plated wire terminals & RCA connectors—Ensure maximum signal transfer.

Stainless steel hardware—Used throughout won’t corrode in humid environments.


Total Frequency Response 20Hz-20kHz 
Signal-to-noise (Referenced to rated power) 105 dBA
Remote Gain yes, for bass 
Distortion at Rated Power <0.1 %
Minimum Impedance Bridged 4 ohms
Minimum Impedance Not Bridged 2 ohms
Protection Circuitry Thermal, DC offset, reverse DC voltage and short circuit; fuses: two 40 Amp ATC 
Subsonic Filter yes 
High Pass Filter
Filter Slope 12dB/octave 
Filter Frequency 40Hz-400Hz(front)/40Hz-4kHz(rear) 
Low Pass Filter
Filter Frequency 80Hz-4kHz(front) 
Max Sensitivity 200mV-6V dB


Cabinet Dimensions
Height 1 13/16" (4.60cm) 
Width 13 5/16" (33.81cm) 
Depth 6 3/4" (17.14cm) 
Product Weight (each) 6.750 lbs. pounds
With Panels
Height 1 13/16" (4.60cm) 
Width 13 5/16" (33.81cm) 
Depth 6 3/4" (17.14cm) 

Amplifier Specs

Power Specs 100W x 4, 400W x 1 RMS @ 2 ohms; 70W x 4, 200W x 1 RMS @ 4 ohms; 200W x 2 RMS bridged @ 4 ohms; 500W x 1 RMS @ 1 ohm (sub) 
Channel Notes Bridgeable Class D MOSFET 
12V & Ground Cable Gauge 4AWG 

Amplifier Power Specs

RMS Power at 14.4V
Watts per channel NOT bridged @ 1 kHz
4 ohms 70 x 4 watts
2 ohms 100 x 4  watts
Watts per channel bridged
4 ohms 200 x 2 watts