Sound Ordnance B-8PTD

125-watt compact powered subwoofer

Item #: 777B8PTD

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400 Reviews


Price Break:-$30.00

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Fill your vehicle with bass, not equipment

Want to put some bass to your vehicle without a lot of fuss? Sound Ordnance's B-8PTD powered subwoofer is the latest version of the B-8PT, one of our all-time best-selling compact powered subwoofers. Sound Ordnance built this new version to perform even better than its predecessor, putting a cool-running 125-watt amp and a rugged aluminum 8" sub in an extremely compact, solid ABS plastic enclosure,so you get years of bass satisfaction. This all-in-one unit frees you from having to deal with a separate sub, amp, and enclosure, saves you cargo space, and simplifies your wiring requirements. Whether it's mounted under your car seat or in an out-of-the-way location in the cab of your truck, this little workhorse will surprise you with its impressive bass and its ability to mesh perfectly with the rest of your system.

Sound Ordnance B-8PTD powered sub

This compact sub delivers strong bass without taking up much space.

Big bass from this tough little sub

A 125-watt RMS Class D amplifier powers the sub and lives on a compact circuit board mounted inside the enclosure. The sub's stiff 8" aluminum cone holds its shape even when playing hard, helping to keep the lowest notes clean, and ensuring a long life for the sub. You can adjust the low-pass filter, variable phase control, and bass boost to get the B-8PTD sounding perfect in your vehicle. Preamp- and speaker-level inputs allow convenient connection to just about any system, even a factory stereo.

Sound Ordnance B-8PTD powered subwoofer

The molded ABS enclosure houses a 125-watt amp and a tough little 8" sub.

Good design helps

The B-8PTD's tough outer casing of molded ABS plastic serves as the sub's sealed enclosure and can withstand some pretty extreme internal pressure changes with no reverberating or buzzing. Sound Ordnance conveniently located the neat, clean, easy-to-understand controls on one side, opposite all the connections, so you won't get tangled in wires as you tune your bass. The control knobs and switches aren't recessed, so you can make adjustments by hand, without the need for a tiny screwdriver.

Product Highlights:

  • powered subwoofer with heavy-duty ABS plastic enclosure
  • 8" woofer with aluminum cone
  • built-in Class D amplifier (125 watts RMS/250 watts peak)
  • 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 included
  • 8- or 10-gauge wiring (not included) recommended
  • dimensions: 9-1/8"W x 3-1/8"H x 13-5/8"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

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.

Sound Ordnance B-8PTD Reviews

Average Customer Review:

400 reviews
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So - So

Written By Chris, Pennsylvania on Tuesday, May 26, 2015

Crutchfield Customer Review (What's this?)

The performance of this powered subwoofer is only "so - so" in my 2015 Toyota Tundra. It only made a trivial improvement to the sound. I'm giving it 3 stars for a few reasons. The product advisor at Crutchfield really talked this item up as if I would expect significant sound improvement. The advisor also sold me a wiring kit for the install and I only used the power wire and the grounding wire. There were multiple other items in the kit that I didn't need for the install (but paid for). Lastly, tech support gave me the wrong color factory wires to hook up the speaker and it sounded terrible. I had to call back and a new advisor was able to trouble shoot and determine that the speaker was hooked up wrong.

Pros: Price

Cons: Trivial improvement to my factory sound. Sold me a wiring kit which included items not needed Tech support gave me the wrong color factory wires for the install


Written By Anonymous, Rio rancho on Sunday, May 24, 2015

Crutchfield Customer Review (What's this?)

Not too much bass as described.. For me just the perfect amount to supplement my Polk speakers.. Could not get amp to power up correctly with just speaker level input.. Called tech support and was told to just hook up remote wire.. Works perfectly for my likes.. Called tech support on couple other issues. This is one reason I would pay just a little more at Crutchfield awesome support and have always been fast and very professional lots of knowledge .. Very satisfied with sound ordinance sub and Crutchfield

Pros: Like bass remote easy install just enough bass to make the sound I was looking for

Cons: None as of yet

Sound Ordnance Powered subwoofer P-8PTD

Written By Jerry D, Sharpsburg, Georgia on Sunday, May 24, 2015

Crutchfield Customer Review (What's this?)

Installed and wired sub with few problems. What issues I had were caused by the fact this was my first install. The techs at Crutchfield helped me out and all was fine. Still trying to tweek the sound. Didn't want a sub everyone around me would hear. Besides, my old ears couldn't handle it anyway. This one will work just fine. Good product, would recommend.

Pros: Pretty easy to install and set up. Nothing fancy. I like that.

Cons: None so far.

Good quality

Written By 08' 2500HD, Wantagh New York on Wednesday, May 20, 2015

Crutchfield Customer Review (What's this?)

It's a solid powered sub that takes up minimal space. That being said i should have known an 8" compact sub wouldn't put out much power. Added to my factory Bose system using the high power inputs, I have to max out the bass of the radio, amp, and supplied bass knob to hear any difference over stock system. Definitely added a low range to my truck that was not there before but don't expect it to blow you away.

Pros: Nice heavy design, fits under back seat of pickup, fills out low range

Cons: Wouldn't buy if your expecting booming bass

Great little sub

Written By kewehog, California on Wednesday, May 20, 2015

Crutchfield Customer Review (What's this?)

very versatile mounting options great not over the top sound for the price great value changed the sound dynamic of my toyhauler trailer can really crank it up and appreciate the sound available from this pioneer head unit and sound ordinance sub

Pros: easy install compact unit great sound

Cons: none

Great deal on awesome sound

Written By Travis, Powhatan, VA. on Tuesday, May 19, 2015

Crutchfield Customer Review (What's this?)

Very good sound out of a small package. This was mounted under the passenger seat of my sons 1997 Honda Accord. He loves it! Enough boom for a 16 year old and no annoying vibrations.

Pros: Easily fits under seat. Nice remote control dial lets you customize bass level.

Cons: None

Easy to hide

Written By icole, Pennsylvania on Thursday, May 14, 2015

Crutchfield Customer Review (What's this?)

I bought this to install in a 2005 4runner. I wanted extra bass, but something my wife would not have to look at. I had hoped to install it under the seat, but doing so would limit seat motion, so I installed it in the back of the seat. It is not a big sub box, and it won't give you the same punch as large wooden box with 8" sub, but it is impressive for its size. I am thinking about putting another one in the other seat.

Pros: fits in tight spaces, and adds thump to your low end.

Cons: It does not have the same bass a big sub box would.


Written By Jon, Bowling Green, KY on Thursday, May 14, 2015

Crutchfield Customer Review (What's this?)

Sounds really good in a jeep whether the top is up or down. Definitely worth the money if you want a good sounding sub that doesn't take up hardly any space. Put mine under the back seat and couldn't be happier with my purchase.

Cons: None

B-8PTD powered sub

Written By PatK, Georgia on Thursday, May 14, 2015

Crutchfield Customer Review (What's this?)

I purchased this to install in a 2010 Mitsubishi Evo which has basically no space for a sub - there is no room under the front seats, and the trunk is very small (the battery and wiper fluid reservoir are back there). I couldn't lose trunk space in this car. I was able to install it behind a plastic trim piece in the trunk that separates the battery/wiper reservoir from the trunk and rear seat. The only reason that I didn't give it 5 stars is that I could not use a low impedance input with the factory nav. unit and the high impedance input/power setup does not always turn 'on' as needed. If I can use the OEM head unit for a low impedance input, this will be perfect.

Pros: Size and ease of install

Cons: High impedance auto power 'on' system is not perfect.

Big punch, small package

Written By John, Northeast on Wednesday, May 13, 2015

Crutchfield Customer Review (What's this?)

Do you want good bass in a compact package at a low price? Look no further! The Sound Ordnance B-8PTD provides powerful bass for making your music fuller or for shaking your windows (if you're into that sort of thing). The Sound Ordnance B-8PTD takes up very little space (I have mine mounted to my rear seat back) yet still provides great sound. The price is affordable on almost any budget.

Pros: Good bass, compact, affordable price.

Cons: None yet.

Sound Ordnance B-8PTD

Written By Anonymous, Nevada on Tuesday, May 12, 2015

Crutchfield Customer Review (What's this?)

This is my second Sound Ordnance B-8PTD in a second vehicle! I love the value of it and the punch it packs!

Sound Ordnance B-8PTD

Written By bobn, Texas on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

This is my 2nd unit. 1 in my soul and 1 in my grandson's ram truck. Took about 3 hrs to install.Fills in the low end a stock system is missing. Sounds great in both units.

Pros: good bass for a much improved over all sound.

Cons: Need to order the power amp install kit for proper install wiring.

Great bass

Written By Lrdfrd, Minnesota on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

If you need some great bass but not the type to vibrate surrounding cars, this is a good choice

Pros: Small and powerfull, clear bass

Cons: Only con i have so far is the double sided tape to mount the remote is absolute garbage. Almost had that 5/5 stars.

Sound Ordnance B-8PTD

Written By greg, shippensburg, pa on Sunday, May 10, 2015

Crutchfield Customer Review (What's this?)

Does its job.

Pros: Small. Compact. Nothing crazy but enough to get the job done.

Excellent Amplified Subwoofer

Written By Michael CH, Colorado on Wednesday, May 06, 2015

Crutchfield Customer Review (What's this?)

Excellent Amplified Subwoofer with all necessary wiring, connectors, cable, etc. I had a professional installer put the unit under drivers' seat replacing OEM unit in a 1998 Subaru Legacy Outback Limited 30th Anniversary. Very happy with the sound and having a radio/cassette/CD in use again. Thank you for the online information.

Pros: Just what I needed and an excellent fit under drivers' seat. Quality of sound superb with the adjustable bass control.

Cons: N/A

Quick Fix- You should know better

Written By MK, L.A, Ca on Tuesday, May 05, 2015

Crutchfield Customer Review (What's this?)

I should have known that you're not going to get real bass out of a thin box. All instincts said "no" but it fit my space and was affordable without putting additional amp/ sub combo. What you get is additional bass to existing sound but it easily overwhelms the sound in back seat when it sounds decent in the front. The remote control is essential because volumes change between radio/ aux and you must adjust bass accordingly. Not sure of the low frequency range but it ain't much. Remember, you're amplifying all sound so if the bass is midway on your deck, you're amplifying that bass, it's not pre-amped so, to limit overwhelming the speaker you have to reduce the bass at your deck. Now your front speakers are getting no bass! I wouldn't recommend this unit unless you have few options.

Pros: Some "bass" for those with few options

Cons: Ignores the reality that you must have a cabinet with sufficient airspace to truly have bass

BIG sound little box

Written By Steve, visalia california on Tuesday, May 05, 2015

Crutchfield Customer Review (What's this?)

This is my second style of sound ordnance self powered subs from Crutchfield and I am completely satisfied with it. I purchased this to go in my f250 crew cab under the rear seat. It gives music the depth and character of a custom stereo without breaking the bank. It wont shatter windows and it wont wake up the neighborhood but it will please the ear for the passengers inside. Decent bass for such a compact design. Easy to install for the Diy person with basic knowledge of stereo installations. Thanks Crutchfield, always there to assist with excellent customer service!

Pros: Low price, easy to install. Remote bass boost knob, big sound, small box, space saver.

Cons: None if you know what you want!

Great little sub, beats the competition

Written By kneedragger37, Pennsylvania on Monday, May 04, 2015

Crutchfield Customer Review (What's this?)

This is a powerful, nice sounding little sub for the money. I can directly compare it with the Kicker Hideaway because I owned that product before this one, and this sub has plenty of punch to keep up with most o