Polk PA500.4

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* 125 watts x 4 (2 ohm) continuous power, 250 x 4 (2 ohm) dynamic power or 250 watts x 2 (4 ohm) continuous power. CEA-2006 Compliant specifications for true, accurate power ratings.
* 4-channel, dual bridge-mono (2-channel), or dual simultaneous stereo/mono operation provide a variety of configurations and setups: 4-channel for front and rear speakers; 2 speakers and a sub; as 2 subwoofers; or as 2 subs and 4-channels in passive-tri mode.
* 2 ohm stable 4-channel operation.
* High-speed MOSFET switching power supply and high current Bipolar Output Transistors pump maximum voltage and high current to your speakers or subwoofers.
* 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 packs more circuitry, with tighter component tolerances, into a smaller circuit board for a smaller overall amp footprint.
* 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.

* Great Looks and Functionality Anodized extruded brushed-aluminum cover for maximum heat dissipation and great looks!
* Cast aluminum textured end caps for optimized heat dissipation and hiding of connectors. Solid aluminum logo and model panel back lit in cobalt blue.
* Fully adjustable 12 dB/octave high or low-pass crossover. Defeatable for full range (flat) operation.
* Switchable 8 dB bass boost at 40Hz for extra bass thump.
* Variable input gain optimizes match with different signal sources (250mv to 7.5V).
* RCA Outputs (front channels only) for easy daisy chaining of other amplifiers.
* Mounting hardware with rubber isolation grommets and extra fuses included.
* Light Bar/Fan Output- Connect an optional LED light bar or cooling fan for custom installations.
* Multi-Color Status LED gives instant information on amplifier operation.
* Remote Subwoofer Level Adjuster for rear channels included.

Power
14.4 Volts RMS Not Bridged @ 1kHz
4 Ohms 90 watts x 4
2 Ohms 125 watts x 4
14.4 Volts Dyanmic Not Bridged
2 Ohms 200 watts x 4
14.4 Volts RMS Bridged
4 Ohms 250 watts x 2
Electrical
Signal-to-noise (Referenced to rated power) > 98 dBA
Input Sensitivity Range 250 mV to 7.5 Volts
Input Impedance > 20k Ohms
Effective Damping Factor >150
Protection circuitry 2 x 40 amp fuses, Power and Ground-Reversal Protection, Thermal and Short Protection, Current Overdraw and Low Impedance Protection circuits
Dimensions
Overall Dimensions (with panels) 2-16/25" H x 18-1/50" W x 10-1/4" D
(6.71cm H x 45.77cm W x 26.04cm D)
Product Weight 16.00 lbs.
Total Shipping Weight 18.00 lbs.
Filter Settings
Subsonic Filter No
High Pass Filter frequency 50-500 Hz
High Pass Filter slope 12 dB/Octave
Low Pass Filter frequency 50-500 Hz
Low Pass Filter slope 12 dB/Octave
Bass Boost Characteristics + 8 dB @ 40 Hz




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