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Sound Ordnance B-8PTD

125-watt compact powered subwoofer

Item #: 777B8PTD

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408 Reviews


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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:

408 reviews
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Great Sub

Written By Devmac, Normal, il on Wednesday, July 01, 2015

Got this for my sons jeep had already spent a lot of money building a system and still had a hollow sound and this was just what it needed! Sounds great and fit right where we wanted it to save room!

Pros: Added the bass the rest of the system needed Small enough to go about anywhere

Cons: None

Sound Ordnance B-8PTD

Written By Rrridogg, Soldotna, Ak on Tuesday, June 30, 2015

Crutchfield Customer Review (What's this?)

I wasn't sure what I was going to get with this product after reading through others reviews but am very happy with my purchase! It puts out a lot more bass than I was expecting and fits really well in my Ford Ranger!

Pros: Size Sound

great sub

Written By Ernie, Michigan on Thursday, June 25, 2015

Crutchfield Customer Review (What's this?)

installed this a dodge dakota quad cab. put it behind the rear seat and it ROCKS easy to install about 1 hour and that included removing seats to run wires. great sound it really enhanced the kenwood system that i previously installed. I would put one of these in every car I own

Excellent subwoofer

Written By Rick O, New England on Tuesday, June 23, 2015

Crutchfield Customer Review (What's this?)

Easy install, great sound. Really filled in the bass in my full size crew cab. RCA input source provides solid punchy bass. Quality product, great size - fits nicely under the rear seat. I recommend this to anyone looking for good bass that isn't looking to thump pedestrians when you drive by.

Pros: Good sound, quality build, nice size, reasonable price.

Cons: None

Exactly what my car needed

Written By AndrewD, Georgia on Sunday, June 21, 2015

Crutchfield Customer Review (What's this?)

Once again the sensible expert at Crutchfield led me into the best choice possible. Instead of the normal nonsense at the local store trying to sell me a million megawatt death sentence for my ears, my guy recommended exactly what I needed to fill the gap in my car's audio system. This sub is exactly the right amount of umph to make my car sound great at lower volumes and make the car shake if for some reason I need it. It complemented the focal brand component speakers I had installed prior by filling the bass gap. It also fit nicely under a seat and didn't rob me of precious cargo space.Thanks for Crutchfield for making such a great recommendation that did not threaten neither my budget or my future need for functioning ears.

Pros: great sound, easy install, fits under the seat to not rob storage and cargo space

Cons: didn't buy it soon enough...

Great sub in a small size

Written By Justin T, Decatur, il on Monday, June 15, 2015

Crutchfield Customer Review (What's this?)

Great sub from a small size. Blew my mind from the amount of sound from this little guy.

Pros: Great sound for a small sub. small foot print allow for under seat installation.

Cons: limited deep bass but not a big issue. Will not sound like a 8 inch in a good sealed sub box but does come close.

Just what my '00 Jeep Wrangler needed...

Written By Mike, Puyallup, WA on Monday, June 15, 2015

Crutchfield Customer Review (What's this?)

This was exactly what my Jeep was lacking in the sound department. Just the right amount of base and hidden out of the way beneath the rear seat. Couldn't be happier. Highly recommend this to anyone with a Jeep Wrangler. I use mine on the trails and keep tools and recovery gear behind the back seat. So a big sub box wasn't an option for me. The size and sound this produces is just right for my liking.

Pros: Great size and sound for a Jeep.

Cons: Nothing so far.


Written By ts, Illinois on Thursday, June 11, 2015

Crutchfield Customer Review (What's this?)

Very easy install. Verified with the rep what cables I would need to connect this to my aftermarket head unit, and watched a few videos on youtube for the best way to route power from the battery. I appreciate the velcro mounting strips as an option. This isn't nearly powerful enough to need to be bolted down to the floor, so I appreciate not having to drill holes in the frame of my car.

Bass is clean, frees up the in-door speakers to handle the mid and upper ranges. Made for a grownup. If you want trunk rattling boom, you should look elsewhere.

Pros: Fits under the seat of a 2010 WRX without interfering with seat travel.

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