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
PA500.4 (4/3/2 channels)
High performance 4-channel mobile audio amplifier
Features like a continuously variable 12dB/octave low-pass crossover, switchable subsonic filter 24dB/octave, switchable 180° phase inversion. and a remote subwoofer level control function enable you to fine-tune your setup to optimize its performance in a variety of configurations.
125 Watts x 4 continuous, 200 x 4 dynamic power (2 ohm load), 4 channel mode.
250 Watts x 2 (4 ohm) continuous power, 2 channel mode.
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; 2 subwoofers; or 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, less shrinkage and a smaller overall amp footprint.
6-way Smart System Protection (SSP) circuits
Fully adjustable (50-500Hz) 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.
|Signal-to-noise (Referenced to rated power)||98 dBA|
|Protection Circuitry||2 x 40 amp fuses, Power and Ground-Reversal Protection, Thermal and Short Protection, Current Overdraw and Low Impedance Protection circuits|
|High Pass Filter|
|Filter Slope||12 dB/Octave|
|Filter Frequency||50-500 Hz|
|Low Pass Filter|
|Filter Slope||12 dB/Octave|
|Filter Frequency||50-500 Hz|
|Effective Damping Factor||>150|
|Input Impedance||20 k ohms|
|Max Sensitivity||250 mV to 7.5 dB|
|Product Weight (each)||16.00 pounds|
|Height||2 9/16" (6.51cm)|
|Depth||10 1/4" (26.04cm)|
|Bass Boost Characteristics||+ 8 dB @ 40 Hz Hz|
|12V & Ground Cable Gauge||8 AWG Minimum|
|Total Shipping Weight||18.00 pounds|
Amplifier Power Specs
|RMS Power at 14.4V|
|Watts per channel NOT bridged @ 1 kHz|
|4 ohms||90 watts|
|2 ohms||125 watts|
|Watts per channel bridged|
|4 ohms||250 watts|
|Dynamic Power at 14.4V|
|Watts per channel NOT bridged @ 1 kHz|
|2 ohms||200 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.
8 reviews with an average of 5Write your own review
by arun dhawan, February 8, 2009113 out of 195 people found this review helpful.
Clean power and loads of it. Quiet as a door mouse. No snap, crackle, pop or hiss.
Size? Nothiing else
Have this amp powering momo components up front and a pair of momo 691 at the back. Am a newbie on the SQ chase. But realised early on that to 'hear' the potential of your speakers you must have a good amp. A good amp is one that provides clean rated power at low distortion. The amp should only amplify the signal from your HU without distorting it. No added hiss, crackles or pops on start up. This amp scores big on all these points. Just two small issues if the polk people are listening in. 1. Why cant the amps have an led meter for the crossovers so that I know what is the actual crossover setting. 2. Why cant there be a slope setting? I think slopes on the amp are 12db/oct. I would like to have the option of 18db/oct. My HU allows me to set the sub to 18 but for my fronts and rears I can only do 12db/oct from the HU and amp. Setup: HU: pioneer 880prs Front: 6.5" momo components Rear: momo 691 sub: momo 2124 4 ch amp: pa 500.4 mono amp: pa 400.1 (I know the sub is underpowered I know.)
by George Morris, May 18, 2008107 out of 189 people found this review helpful.
I have abused the one in my car horribly going for 6 hours solid on the interstate as loud as it will go and this amp has never missed a beat
This amp is incredible and very versitale. For customers who want some serious highs this is for them I have one of them in my car on MOMO Components and it is to louad I love it. Also a lot of time we use this amp to power a left and right side and leave the two remaining channels for a sub which I have done a few times with this amp. The best highs amp I have seen that is readily availible on the Market
by Jeremy, May 27, 2008106 out of 185 people found this review helpful.
Great Power,Clean Sound,Looks,Great touch with the Blue LEDs under Silver,Love it :) very Happy
Price! But you get what you PAY FOR!
My old alpine MRV-F303 amp was give up the GHOST! so i went with this amp. It makes the alpine sound really Bad! One of the Cleanest Sounding amps i have heard! I also got the SR5250 Compount set! Rocks! great sound! working on Getting All SR sound system! Way To-Go!! Polk Audio!
by Nathan, December 17, 2009100 out of 153 people found this review helpful.
Runs clean, cool, very good quality sound!
Size, if that is a weakness at all.
Pair this amp with the mm571 speakers and you will have yourself some quality sound. this amp is unbelievable, I ran this hard for a good 3 hours and it didn't miss a beat, it runs very cool and very clean. Does not make my lights dim at all. the only downside is the size of it. If you want a quality 4 channel amp than look no further because this will fill your needs.
by Toby, September 11, 200999 out of 158 people found this review helpful.
I go the PA500.4 because it was a low power amp with built in adjustable crossovers. set it up to run my 3.5" and 6"x8" speakers. Put in a little effort to adjust the crossover and it was amazing!!!!! The cleanest amp I have every had the pleasure of listing to. Great sound, no noise, clean and solid for mid-range and highs. After putting it in, I went and bought another one to push my other set of 6"x8" and 3.5" as well as my 5.25" speakers. Polk out done themselves with these amps.
by Aaron Thomas, April 19, 200895 out of 180 people found this review helpful.
Fan/LED lighting jack. Very well built and noise free.
Pretty big. Hard to fit into tight spots.
Love these new amps. Head and shoulders above my old Crossfires. Plenty of cool features like the remote gain control but the best one is the plug for either LED lighting or cooling fans. No need to do a lot of cumbersome wiring, just plug it into the jack in the amp and youre in business! This sounds great too. Gobs of power and clean as a whistle. Has no noise at all. No turn on or off pops, hissing or anything else. Very quiet operation. I compete in sound quality competitions and system noise is a killer. I cant wait to hit the lanes with these.
by Samuel Caplan, February 2, 201076 out of 148 people found this review helpful.
Combination of clarity, power, efficiency, and flexibility make for an Incredible amp.
Hard to find speakers that work well with such massive output. Somewhat pricy.
This is by far the cleanest sounding, most powerful, coolest running, full featured amplifier i have ever had the pleasure of installing in a car. I debated about pairing this unit with either Alpine, JL, or Polk speakers. I went with two pairs of Polk MM6501 Components, because of the price, 2.7ohm operation, and intense power handling. I was incredibly impressed at the ability to run these speakers full range, and still be able to crank the system with no distortion at insane listening levels. Adding a pair of Polk db12" subs in a factory enclosure and a Kicker 750 watt sub amp made for a competition quality system with unbelievable volume, punch and clarity. Have you ever listened to a song that started softly, but seconds later is blaring to the point of speaker-eating distortion, forcing you to dial back the volume in the middle of playback? Not a great thing to have happen when your trying to show off your hard work. You will NEVER have that problem with this amplifier.
by Emanuel, September 17, 201140 out of 50 people found this review helpful.
Gets loud with no distortion
kinda big for a 500RMS amp but it makes up for it with it being amazing and all.
I bought this amp to push two pairs of components. I have Polk Audio MM 6501 in the front and back. All I can say is that this thing gets llllllllloud and sounds amazing. I couldn't be happier.
This product is considered a "Recent" or "Vintage" Polk Audio model. It is not a part of our current product lineup. It may still be available in some stores as a "close out" or "used" product. Information provided here about this product may not reflect current realities and does not imply availability. If you happen to have a question or concern about this product, contact our Customer Service Department at 1-800-377-7655 M-F 9am - 5:30pm EST. Chances are we remember it.
Want to know more? Want to dig just a little deeper to learn about this product? Here's a list of source material that will give more detail, other perspectives, and answer questions you may have.