Sound Ordnance B-8PT

120-watt compact powered subwoofer

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  • Sound Ordnance™ B-8PT


  • Sound Ordnance™ B-8PT


  • Sound Ordnance™ B-8PT

  • Sound Ordnance™ B-8PT

  • Sound Ordnance™ B-8PT

  • Sound Ordnance™ B-8PT

  • Sound Ordnance™ B-8PT


  • Sound Ordnance™ B-8PT

    Remote control knob

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Item #: 777B8PT

Review Summary

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Original price $149.99
We recommend this similar item, or shop all Powered Subwoofers

Our take on the Sound Ordnance™ B-8PT

by Dominic Devito
Sound Ordnance

Who needs a powered subwoofer?

To produce bass, you need a sub, an enclosure, and an amplifier, and it can be little tricky to match them all up. A powered sub eliminates all the hassle, as the manufacturer designs the enclosure to house the sub and amp together. This all-in-one solution is especially useful in smaller vehicles, where there's no room to mount a separate amp, or in any vehicle where you need every bit of cargo space. Powered subs range from small, flat boxes that fit under your seat to larger boxes that go in your trunk.

The Sound Ordnance B-8PT powered subwoofer turns the hard-to-fit spots in your vehicle into potent bass bastions, adding warmth and punch to your favorite music. You can fit this compact low-frequency factory under your car seat or in an out-of-the-way location in the cab of your truck. Preamp- and speaker-level inputs allow convenient connection to just about any system, plus you can tweak the phase control, bass boost, and low-pass crossover for maximum firepower in your vehicle. A wired remote lets you take command of your bass from the driver's seat.

The B-8PT's built-in amplifier sends 120 watts RMS to the 8" subwoofer, adding high-impact low notes that'll fortify your music. The Sound Ordnance logo means you'll get more than tremendous value and reliable performance — the B-8PT is reinforced with a 3-year warranty so you can add it to your system with confidence.

See more info on this item


  • powered subwoofer
  • 8" woofer
  • built-in 120 watts RMS amplifier (250 watts maximum)
  • frequency response: 40-200 Hz
  • variable low-pass crossover (80-200 Hz)
  • variable phase control (0-180 degrees)
  • bass boost control (0dB to +10dB)
  • preamp- and speaker-level inputs
  • auto turn-on switch
  • wired remote control
  • 8- or 10-gauge wiring (not included) recommended
  • dimensions: 9-1/8"W x 3-1/4"H x 13-7/8"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Enclosure Type Sealed
Finish Material Metal/plastic
Grille Metal
Connector Type RCA/Molex
Bi-amp Inputs No
Woofer Size (inches) 8
Woofer Material Aluminum
Passive Radiator None
Width 9-1/8"
Height 3-1/4"
Depth 13-13/16"
Second Depth N/A
Parts Warranty 3 Years
Labor Warranty 3 Years
Frequency Response 40-200
Amplifier Power (RMS) 120 watts
Maximum Wattage 250 watts
Sensitivity N/A
Impedance N/A
Second Voice Coil Impedance N/A
Crossover Point 80-200
Product Research
What's in the box?

Download owner's manual

  • Amplified subwoofer
  • Two 15 amp ATO fuses (1 installed)
  • Wired remote bass control
  • 14' Remote cable (RJ-14 plug on both ends)
  • 8" Speaker input harness
  • Two 6-1/4" x 2" Self-adhesive "Hook" strips (half of the Hook and Loop combination)
  • 3/4" Self-tapping screw (to mount wired remote)
  • Owner's manual
  • Warranty information

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.



Overview: The B-8PT amplified subwoofer features a 120-watt RMS (250-watts max) amp and an 8" sub housed in a rugged, compact enclosure designed to fit in tight spaces.

Wired Remote Control: The wired remote control puts control of your subwoofer output within easy reach. The remote can be mounted using the attached double sided tape or the included self-tapping screw. The dimensions are:

  • Width: 1-1/4"
  • Height: 1-1/4"
  • Depth: 1-15/16" (2-1/2" including the knob)

Mounting: The subwoofer, with its 3-1/4" height, can be mounted flat under a seat in the passenger compartment of many vehicles.


Power Mode:

  • Auto: amp turns on when a signal is present on the speaker-level input
  • Remote: amp turns on when 12 volts is applied to the remote terminal

Level: rotary dial to set the amplifier gain control

Bass EQ: bass boost; 0 to 10 dB

Phase: rotary dial to set the subwoofer phase; 0° to 180°

Frequency: rotary dial to control the low pass crossover frequency; 80 to 200 Hz


Power: power, ground, and remote inputs are on a screw terminal strip; each is 0.35" wide

Line Input: stereo RCA jacks

Speaker Input: Molex jack for included harness

Remote: 4-pin RJ-14 jack for use with included remote cable


Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Sound Ordnance Subwoofers

Video: Sound Ordnance Subwoofers

by Zak Billmeier, Jo Greene
Video: Sound Ordnance Subwoofers

Car audio systems need a subwoofer to fill out the bass in your music and give it a full-bodied sound. Watch this short Crutchfield video to learn about the subwoofer options available from Sound...

Quick impressions from the Lab

Comment by Robert Ferency-Viars Staff Writer - Creative,

Added much-needed bass to my daily commute!

Written by Robert Ferency-Viars, Staff Writer - Creative, on 12/21/2011 12:41:00 PM

I recently added the Sound Ordnance B-8PT powered sub to the back of my car, a Nissan Versa, and I'm very happy with it. It's just the right amount of bass for me, and I immediately started hearing notes that I'd never heard in my car before. If I turn up the sub, it booms really well - it's not shy! But I like my bass tighter and more focused, so I have the gain set about midway to keep it under control. It's great! The remote control knob lets me turn it down when my sons are in the car, so they don't have to put up with the pounding bass.
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