This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST

C500.1 Monoblock

Single Channel

Available Finishes:

Championship Performance

"The C500.1 greatly exceeds its rated power production capabilities. The amp produced an incredible 617 Watts. Finally, with the extra 0.9V added to the supply, the amp cranked out an incredible 691.5 Watts." - Performance Auto & Sound 1/04

"I changed my subwoofer amps from [Brand X] to Polk C500.1. The Polks blow away the [Brand X]s. The Polk amps make my woofers hit harder, go lower and play louder." - Brian Hughes, Trophy-Winning Pro Tuner

Championship Performance means: More Power. Better Sound. More Control. Built To Be The Best.

More Power.

  • Polk's Massive Dynamic Headroom (MDH) Power Supply uses multiple smaller-value capacitors wired in parallel to lower the Equivalent Series Resistance (ESR). This lowers impedance for more efficiency, faster transient response, more instantaneous power peaks, tighter bass and better control.
  • The MDH Power Supply features oversized Toroidal Transformers to more easily deliver high voltage, high current power. This set of tremendous transformers lowers the incidental radiation of stray magnetic fields for uncontaminated audio signals.
  • Oversized Power Supply BUS Bars achieve maximum power transfer from the MDH Power Supply to the audio circuitry for more efficient high voltage, high current output stages.

Better Sound.

  • Power Supply "Choke"? Inductor reduces stray noise effects from power cables and alternators, cutting ground loop disturbances for truly quiet amp performance.
  • The C500.1 Mono Amp features JFET Input Gain Stages to provide low-noise amplification for quieter amp operation and warmer sound, while efficient Class-D, N-channel HEXFET MOSFETS deal out hard-hitting bass.
  • High current Bipolar Output Transistors with low impedance pump maximum voltage and high-current to your speakers. Dual low noise Operational Amplifiers at the input gain stages deliver higher gain & wider bandwidth at a faster “slewâ€? rate (with the ability to change voltage “on the flyâ€?), for excellent transient response.
  • High-end Non-Inductive Metalized Film Capacitors in the active filter stages for excellent transient response and extended bandwidth with low noise and low distortion.
  • Surface mounted Metal Film Resistors are used in the audio signal path, delivering higher performance with lower noise and less fluctuation (“value driftâ€?) over time. MFR technology is so stable that your music will sound perfect for the life of your amp.
  • High damping factor at the speaker output terminals improves driver control for tighter, punchier bass.

More Control.

  • While most amps have an input sensitivity up to only about 2 Volts, Polk's Variable Input Sensitivity ensures high performance even with older, low-power head units by accepting 200mV up to 8 Volts, and allowing Line Level (RCA) or Speaker Wire inputs.
  • Fully adjustable electronic crossovers power any install using virtually any speakers on the market.
  • The exclusive Polk/MOMO Pre-EQ Switch optimizes the amp's active crossovers for use with Polk/MOMO Ultra High Performance Speakers and Subwoofers for perfect sound every time! In the C500.1, the Pre-EQ is a single-band fixed EQ (+9dB @ 40Hz, bandwidth of 1/3 octave) specifically tailored to punch up Polk/MOMO Sub response.
  • Easily installed Remote Subwoofer Level Control is included with the C500.1 Mono Amp. (Available separately for the other models.)

Built To Be The Best.

  • Industrial-strength extruded aluminum, supremely rigid and warp-resistant, with excellent heat dissipation for more reliable performance. Styled in conjunction with MOMO, maker of the world's most sought-after bolt-on accessories, and featuring real Carbon Fiber accents.
  • 6-Way Smart System Protection (SSP) circuits: Power and Ground-Reversal Protection, Thermal and Short Protection, Current Overdraw and Low Impedance Protection circuits with auto-Standby Mode ensure safety, reliability and durability.
  • Selectable Subsonic Filters (15Hz@24dB/octave) for an extra level of speaker protection. Select ON/OFF via internal jumpers to keep subsonic frequencies from reaching drivers, preventing driver damage at high levels of low frequency play and reducing stress on the power supply for extreme reliability.
  • Dual (top and side) computer optimized extruded aluminum Heat Sinks for more efficient power output, superior heat dissipation and high reliability.
  • Double Layer Fiberglass Epoxy Printed Circuit Boards for more rigidity and less shrinkage, with plated through-holes instead of jumpers, for twice the amount of component contact area. Efficient layout safely packs more circuitry, with tighter component tolerances, into a smaller circuit board for a smaller overall amp footprint.
  • Removable cast aluminum End Caps offer more flexible install options, including an even smaller amp footprint.
  • Power, Thermal and Short Protection LEDs easily visible on top plate.
  • Hideaway Cover Plate conceals the wiring and the "Set It Once" user-adjustable controls for clean-looking, fiddle-free installs.


Total Frequency Response< 10Hz to 200Hz 
Signal-to-noise (Referenced to rated power)105 dBA
Remote Gain0 to -30dB 
Protection CircuitryPower and ground reversal, Thermal and Short, Current Overdraw and Low Impedance Protection with auto stand-by mode 
Subsonic Filter24dB/Octave @ 15Hz 
Low Pass Filter
Filter Slope12 or 24dB/Octave 
Filter Frequency30Hz to 200Hz 
Input Impedance10.0000 k ohms
Output Impedance0.0200 ohms


Product Weight (each)10.00 pounds
With Panels
Height2 1/2" (6.35cm) 
Width11" (27.94cm) 
Depth9 3/4" (24.77cm) 

Amplifier Specs

Channel Notes1 MonoBlock 
Total Dynamic Power975 watts
12V & Ground Cable Gaugeaccept up to 4 AWG wire 


Total Shipping Weight12.00 pounds

Amplifier Power Specs

RMS Power at 14.4V
Watts per channel NOT bridged @ 1 kHz
4 ohms350 watts
2 ohms500 watts

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

C500.1 Media

C500.1 Literature

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Series Catalogs

C500.1 Monoblock Accessories