Skip disability assistance statement.

Welcome to our website! As we have the ability to list over one million items on our website (our selection changes all of the time), it is not feasible for a company our size to record and playback the descriptions on every item on our website. However, if you have a disability we are here to help you. Please call our disability services phone line at 918-495-0586 during regular business hours and one of our kind and friendly personal shoppers will help you navigate through our website, help conduct advanced searches, help you choose the item you are looking for with the specifications you are seeking, read you the specifications of any item and consult with you about the products themselves. There is no charge for the help of this personal shopper for anyone with a disability. Finally, your personal shopper will explain our Privacy Policy and Terms of Service, and help you place an order if you so desire.

Explore Tulsa

MODEL 500W High Output 4 Channel Full Range, Class A/B Amplifier Dim:7.5"L 5.2"W 1.7"H

Boss Audio BPS4B


  • 4 Ohm Stable
  • Audio Streaming
  • Aux Input
  • Class A/B

Quick Specs

  • Type: Amplifier
  • Width: 5.2"
  • Height: 1.7"
  • Depth: 7.5"
  • Energy Star Rated: No

See More


4 Ohm Stable The lowest impedance accepted by this amplifier is 4 ohms, which makes it ideal for powering full range speakers in your vehicle, as most automotive speakers are 4 ohms impedance.

Audio Streaming Audio streaming [A2DP] is an audio protocol of Bluetooth technology. This profile allows for audio to be streamed wirelessly from your compatible device, such as a Smartphone, to the source unit so you can enjoy your favorite music or streaming music service such as Pandora or Spotify, wirelessly.

Class A/B Class A/B amplifiers have long been known for their ability to produce great quality sound while performing more efficiently than pure Class A amplifiers. We have developed a specific linear circuitry that further reduces distortion while increasing both sound quality and power output.

Multi-Function Remote Control In-line Remote Control that can be installed in a convenient, safe place to allow you to control the volume, track and other functions of your system while riding.

Protection If the amplifier gets too hot, the thermal protection circuit turns the amp off and allows the amp to cool down before turning it back on. If a speaker fails causing an electrical short, the protection circuit will automatically cut the output and remain in that state until the short is resolved. These safety features give you peace of mind knowing the amplifier is constantly monitoring conditions to protect itself.

USB Charging Built-in 1A charger allows you to charge your USB connected device thru this units USB port.


  • 4 Ohm Stable
  • Audio Streaming
  • Aux Input
  • Class A/B
  • Multi-Function Remote Control
  • Protection
  • USB Charging
  • Wireless Remote Control
General Specs
Channel Configuration 4 Channel
Amp Topology Full Range, Class A/B
Performance Specs
Total Power Output 500 Watts
Peak Power @ 4 125 Watts x 4
RMS Power @ 4 94 Watts x 4
Speaker Impedance 4 to 8
T.H.D. (Total Harmonic Distortion) 0.01 %
Channel Separation 103 dB
S/N Ratio (A-Weighted) 90 dB
Frequency Response 20 Hz to 20 kHz 1 dB
Connections, Controls, and Processing
RCA Inputs 2 Channel
Pre Amp Outputs 2 Channel
Remote Subwoofer Control YES
Thermal/Overload/Short Protection YES
Extra Features
Bluetooth Audio 4.2 A2DP Wireless Audio Streaming - play music and apps like Spotify/Pandora wirelessly
4-channel Micro Amplifier, Aux Inputs, RCA Pre-amp Outputs
USB Charging, Inline Multi-Function Remote
RCA preamp output to daisy chain multiple amps
Included RED / BLUE-backlit UV / weather resistant silicon button controller
Includes Multi-mount controller system: Includes flush mount bezel and stainless steel handle bar clamp
Compatible with optional MC900SMC surface mount Y controller kit
Compatible with MUSB35 USB /3.5mm extension kit
Width 5.2"
Height 1.7"
Length 7.5"

Quick Specs

  • Appearance

  • Type: Amplifier

  • Dimensions

  • Width: 5.2"
  • Height: 1.7"
  • Depth: 7.5"

  • Features

  • Energy Star Rated: No

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Electronics can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.