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Sound Ordnance Bass Bunker

Sealed single 8" subwoofer enclosure (Model BB8-35S)

34 Reviews | 5 questions - 11 answers

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Item # 777BB835S

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Our take on the Sound Ordnance™ Bass Bunker

Sound Ordnance's rugged Bass Bunker enclosures come built to last and ready to help your sub deliver real low-frequency firepower. These unloaded boxes feature high-grade, medium-density fiberboard construction, with sealed inner braces that help combat resonance by reducing vibrations. Rounded outside corners and recessed panels allow them to fit into more vehicles, while tough black carpeting defends against incoming nicks and scratches. Bass Bunkers make a great solution when building your own box is not an option.

Sound Ordnance's rugged Bass Bunker enclosures come built to last and ready to help your sub deliver real low-frequency firepower. These unloaded boxes feature high-grade, medium-density fiberboard construction, with sealed inner braces that help combat resonance by reducing vibrations. Rounded outside corners and recessed panels allow them to fit into more vehicles, while tough black carpeting defends against incoming nicks and scratches. Bass Bunkers make a great solution when building your own box is not an option.

The BB8-35S sealed enclosure holds one 8" subwoofer and offers an internal volume of 0.38 cubic feet. Just add the right sub, amp, and wiring, then mount the enclosure securely, and you're ready to hit the road with some real bass artillery in your arsenal.

Warning: This enclosure does not include mounting hardware. If you're buying a sub from us, please check "What's in the Box?" to see if screws are included. If not, you should have an assortment of heavy-duty wood screws on hand for the installation.

Product Highlights:

  • sealed hatchback style enclosure for one 8" subwoofer
  • 1/2" MDF (medium-density fiberboard) with black carpet covering
  • cutout size: 7-3/16"
  • internal volume: 0.38 cubic feet
  • dimensions: 10-3/4"W x 10-1/16"H x 10-11/16"D1 x 7-1/2"D2
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Single hatchback-style enclosure for 8" subwoofer with spring-post terminals

Great little box, high quality terminals, I'll probably get another

Thomas, Carson City, NV


Sound Ordnance™ Bass Bunker Reviews

Average Customer Review(s):

(34 Reviews)

Sound Ordnance™ Bass Bunker

Crutchfield customer from Picayune, MS on 2/6/2019

2018 Honda Civic
Crutchfield Customer Review (What's this?)

Excellent box, easy to install, produces good and accurate bass for a little 8inch sub.



Sound Ordnance™ Bass Bunker

Thomas from Carson City, NV on 2/1/2019

2011 Jeep Liberty
Crutchfield Customer Review (What's this?)

Great little box, high quality terminals, I'll probably get another



Great Quality

Emad from Flushing, NY on 12/28/2018

Crutchfield Customer Review (What's this?)

Excellent Quality

Pros: Wonderful enclosure clean and professionally made

Cons: None

Sound Ordnance™ Bass Bunker

Crutchfield customer from Menomonee Falls, WI on 11/30/2018

2015 Honda Fit
Crutchfield Customer Review (What's this?)

Nice little box. Well made and used for part of my workbench stereo.




Michael from EMINENCE, KY on 10/17/2018

1993 Buick LeSabre
Crutchfield Customer Review (What's this?)

These will have to do until I can afford to run a Zero Guage Wire with an Inline Fuse from the Battery to the Distribution Block in the trunk. Feeding 3 amps (1500 RMS). Big 3 completed. Yellow Top battery added. 90a Alternator replaced with a 170a. Lights still dim a bit but subs are no longer starved for power and clipping. New issue is blowing fuses on the inline 4 guage currently ran from battery to trunk, when i turn it up max. 17 ft of Zero guage should resolve that issue. Waiting to afford the money for it (pre crimped).



Sound Ordnance™ Bass Bunker

Crutchfield customer from Conyers, GA on 5/21/2018

Crutchfield Customer Review (What's this?)

For a little box this thing pounds hard. Put a sundown sa8 V3 D2 in it. The Box and the woofer cost me much less compared to the of the kicker l7qb8. I spent more money on a kicker 43CXA6001 mono amp and I would put my box up again it the L7QB8 any day. The only thing was I modified the box to fit the sundown 8 inch because it is a little wider than the precut opening, along with the 2 support brace in the box. I then sprayed some bed liner or rubberized coating to make the wood harder and use my heat gun to dry it out and it will smoke while the cure or just let sit for 8 hours. Afterwards drop that 8 inch in and you will be blown away. All for the price of the L7QB8.

Pros: Awesome little box

Cons: You will have to modify it if you want to use the sundown audio SA8 V3 D2.

Sound Ordnance™ Bass Bunker

Crutchfield customer from Hurst, TX on 4/22/2018

Crutchfield Customer Review (What's this?)

Good sound for an 8" subwoofer



Sound Ordnance™ Bass Bunker

Crutchfield customer from Oak Creek, WI on 2/4/2018

2016 Ford Focus
Crutchfield Customer Review (What's this?)

Perfect match for my 8" sub. Solid construction and tucks nicely behind the rear seats in a Focus hatch.

Pros: Fitment, cost, construction

Cons: Wimpy wire pre-installed inside enclosure

Sound Ordnance™ Bass Bunker

Eugene from Peyton, CO on 12/22/2017

2006 Chevrolet Impala
Crutchfield Customer Review (What's this?)

I ordered a Sound Ordnance 8" sealed sub box. Was very pleased with the enclosure and 3 day free shipping . FYI it looks and sounds great thanks Crutchfield.

Pros: It was cheaper to buy , then it would cost to make a one . Good deal save me time.

Cons: Could be made with 3/4". Even though it sounds awesome.

Sound Ordnance™ Bass Bunker

Crutchfield customer from Sterling, MA on 12/2/2017

2017 Jeep Wrangler Unlimited
Crutchfield Customer Review (What's this?)

Solid construction and compact



Well Made, Compact Sub Box

Robert from Houston, TX on 6/3/2017

2017 Honda Accord
Crutchfield Customer Review (What's this?)

Compact, well constructed 8" sub enclosure with audible, useable output (down to ~45 Hz) when paired with a high quality Focal Performance Sub P 20F 4 ohm subwoofer. Ended up with a larger 12" sub & enclosure to hear deeper bass with more "punch," but that's my choice & not the SO enclosure's fault. The small internal volume & laws of physics are the limiting factor here.

Pros: *Build quality *Compact size * Audible, useable output

Cons: Small interior volume & laws of physics limit output

Sound Ordnance™ Bass Bunker

Crutchfield customer from Springdale, AR on 4/3/2017

Crutchfield Customer Review (What's this?)

Its great to have bass and trunk space as an adult. I matched this up with a Polk MM that you can find here, good combo



killer box. killer price

Jack from Smyrna.Tn on 2/28/2017

Crutchfield Customer Review (What's this?)

Outstanding box. Had old Rockford fosgate RFP3208. Still sounds great


Cons: None

Sub Enclosure to "thump" them all

Gary from Santee, CA on 1/8/2017

Crutchfield Customer Review (What's this?)

A great value with a price point below what it would cost me to build my own. This nicely made subwoofer enclosure has saved me time as well as money - thank you for offering great quality products at reasonable prices; makes it easier for me to make repeat purchasesl Thank you! Gary

Pros: Solid construction that leaves nothing more than to add my quality subwoofer

Cons: None - I should have bought it sooner!

Perfect foundation for sub performance

Mike from Cincinnati, OH on 7/7/2016

Crutchfield Customer Review (What's this?)

Last year I upgraded my daughter's stereo in her Jeep with a Pioneer head unit and 4 new Kenwood 6.5" two-way speakers, which I purchased here @ Crutchfield. She loved the new set-up with hands free phone and bluetooth for music streaming. However the new set-up was not much better in audio fidelity than the factory system. The mids and highs were improved but there was almost no bass. This year, I decided to add a little bass punch. She didn't want to rattle windows, so I put together what I think is a great budget bass build. I used the Sony GS 8" woofer, Sony 500W 2.1 Amp, and the Sound Ordinance 8" sealed enclosure. All bolted together, this is one compact package that looks awesome. The Sound Ordinance enclosure is excellent. It is so well-built, I was amazed for the price how nice it was. The only thing I don't like is the "S/O" logo on the front of it. Otherwise, you cannot beat this enclosure. Unless you are a carpentry expert, you can't build a box this nice for the money.

Pros: Excellent build quality, value for the money, sounds great loaded with a Sony GS 8" sub, Crutchfield service.


Sturdy standard

Happy from St Paul, MN on 4/20/2016

Crutchfield Customer Review (What's this?)

It's a great little enclosure, it's a basic standard subwoofer enclosure for a great price.

Pros: Everything.

Cons: None.


Keith from douglasville, GA on 2/24/2016

Crutchfield Customer Review (What's this?)

Very nice box for the price. S/O is the way to go for price and quality these days. Don't let the name fool you.

Pros: Quality and Price


Great Enclosure

Duncan B from TX on 2/22/2016

Crutchfield Customer Review (What's this?)

This enclosure was great for my 2016 Mustang. I combined it with a JL 8W3v3-4 sub and JX 250/1 amp. It makes clean powerful bass. It fits almost perfect into the side of the trunk.

Pros: Well made and just the right size


Just Perfect!

Mark A from Alabama on 9/4/2015

Crutchfield Customer Review (What's this?)

I bought this box for my 2008 Scion xB. I was looking for thumping bass, but I did want something which would give me more bass response. The Bass Bunker combined with a JL 8" Sub was just the ticket. The box is almost the perfect shape to fit in the space behind the rear seat. Combined with a generous amount of Crutchfield's Polyester Fiber Stuffing this combo can't be beat!

Pros: Well made, quality materials


Unusual use for these

RichJ from Connecticut on 5/7/2015

Crutchfield Customer Review (What's this?)

Got my hand on my mothers 50 year old stereo console, cabinet in great shape but sound quality unbearable. Gutted the cabinet and installed some good vintage components. Installed a pair of ADSL780 book shelf speakers (from the 80s) in the cabinet. The dome midranges and tweeter did not need to be in an enclosure so they were just mounted on the speaker baffles, but needed enclosures for the woofers. These worked great, 8 inch woofers fit perfectly in them, they are small enough to fit and they are placed just behind the opening for the woofer in the cabinet. Although a little bass heavy the speakers sound great.

Pros: Good construction

Cons: none

nice box

Crutchfield customer from Virginia on 2/4/2015

Crutchfield Customer Review (What's this?)

I would have liked thicker material but it does the job.

Pros: Sealed nice.

Cons: Material thickness - this is personal preference.

Constructed Well!

Dee from Florida on 12/19/2014

Crutchfield Customer Review (What's this?)

Having constructed countless sub enclosures since the early 90's, I am quite impressed by this little one. Many may scoff at it's wall thickness (or lack thereof), however if you know about building boxes then you would know that it doesn't always take 3/4" material to build a sturdy box. The bracing helps a little with the sides & bottom (it isn't attached to the top for some reason), but the actual construction itself with the way the panels are fitted together adds enough sturdy bracing intrinsically. Recessed sides & small panels helps avoid panel flex! This also in turn lessens weight tremendously, and that is compared to another similar size DIY 8" enclosure stored in the closet. The 16 gauge wiring suits well with subs that will easily fit into the cabinet so I there's really no need to change it. For those who are worried about it, there is only around a 1.2 watt/.09 DB loss of power over 1.5ft of 16 gauge wire. That's 198.81 watts out of 200 still passing through. Clearly inaudible & insignificant! Carpet looks great & the binding post terminal gives a professional build look & quality to it! Only con that I can see to this box is perhaps the sub could have been placed on the slanted side to aid in stability from tip overs for wild drivers, but that's what securing to the floor is for. I would definitely buy this again!

Pros: Great build quality! Sturdy & lightweight. Enough wire length to attach the sub out of the box. Quality terminal & carpet... price is spot on!

Cons: Would have like to see the bracing stretch up to the top, but really isn't necessary. Enclosure might be more stable if sub was placed on the slanted side... still no big deal for normal driving.


rob from rich in on 10/6/2014

Crutchfield Customer Review (What's this?)

it works well



Sound Ordnance Bass Bunker 8"

MikefromMass from MA on 9/2/2014

Crutchfield Customer Review (What's this?)

Nothing fancy but one look says quality. Unless you already have all the tools to make a box of your own, you'll never be able to buy all the supplies you'll need to build a box like this for the money. Custom builds are fun but sometimes it's just not worth it as is the case here for me. Running a JL8w3v3-4 off a 200w MTX amp with very good results. Box solid as a rock. Bracing is strong, seams are clean, carpet is perfect, hardware is quality. Pre-soldered wiring is a bit lame but I planned to solder on my own Monster Cable anyway (pre-installed came right off with soldering gun). I'm fussy and was still more than satisfied.

Pros: Fit and finish, price, time saved not building my own enclosure!

Cons: Pre-soldered wire is pretty wimpy


Rodney from Columbus, Ohio on 8/27/2014

Crutchfield Customer Review (What's this?)

Perfect size for my sub and the trunk of my car.

Pros: Perfect fit, great sound

Cons: None!

Great for the price

Slink from Murrysville, PA on 10/31/2013

Crutchfield Customer Review (What's this?)

Sounds great with a rockford fosgate 8". Actually suprised me for the price

Pros: Cheap, great quality

Cons: -

Excellent with only one issue

dearmosd from Liberty Twp, Ohio on 9/28/2013

Crutchfield Customer Review (What's this?)

EXCELLENT PRODUCT only one issue i didnt like was the bracing inside the box blocked some thicker magnet speakers or magnets that were wide. The brace prvented the speaker from fulling sitting, easy correction i just removed the bracing but other than that this is a great box. I plan on ordering another for my 10" sub

Pros: excellent construction and material

Cons: inside bracing decreased inside size were the thicker speaker magnet was hitting the bracing

Lil Bass Bunker is correct

Devin D from Chicago, IL on 9/10/2013

Crutchfield Customer Review (What's this?)

Nice compact size w/ a solid construction my only complaint if you want to even call it that is that the box tips over easy so it needs to be secured some way. I paired it w/ a JBL GTO804 & Alpine MRP-M500 & the trio works really well together in the small trunk of my 2011 Camaro.

Pros: Compact Size, solid construction

Cons: Tips over easy needs to be secured

8" sealed bass bunker

greg from cass city mi on 7/17/2013

Crutchfield Customer Review (What's this?)

small&convenient used with infinity 860w it has amazingly punchy clean response with good output powered by 265watts rms...awesome sound quality&saves space,used it as a midbass driver in front of console between front seats with a single 12" in rear of minivan....incredible!

Pros: small enough to fit almost any vehicle

Cons: none

Solid Enclosure!

azhtfreak from McMurdo Bay, Antarctica on 6/15/2012

Crutchfield Customer Review (What's this?)

Solid construct - 5/8" MDF and good binders - why I bought it... Dropped a Kicker 10CVR82 8" 2x2ohm DVC in.

Pros: Kicker 10CVR82 hits hard in this sealed enclosure - after mods (see below). FREE S/H!!!

Cons: This IS a premium price for a small 8" enclosure. MODS: (1) Replaced the supplied 16GA internal wires with 12GA, (2) RTV (caulk) the binder cup to actually SEAL the enclosure, (3) added poly fill. For a $40 8" SUBWOOFER enclosure, move to the 12GA and the poly fill, it's what, a +$0.05 increase per piece???.

S/O Bass Bunker 8 inch

Chuck W. from Madison, Wi. on 6/7/2012

Crutchfield Customer Review (What's this?)

I have not yet heard how this product will make my 8 inch JBL Sub sound. My stereo build is just waiting for some rca/speaker adaptor cables to be complete. The quality of the Sound Ordinance Bass Bunker in 8 inch is very good. The construction is flawless and a good marine grade carpet is used to finish it. I did remove the smaller gauge wire that came with it and replaced with 12 gauge cable before mounting the Sub. It is a great product to be sure...

Pros: Great Quality

Cons: None

Sound Ordinance

Vernon D from San Leandro on 4/18/2012

Crutchfield Customer Review (What's this?)

Great buy, name speaks its performance



Sound Ordnance™ Bass Bunker

BenO from Tyler TX on 8/2/2011

Crutchfield Customer Review (What's this?)

I was pleasantly surprised to get a box of this quality for this price. Works perfectly with my 8 inch infinity speaker, however I did have to slightly enlarge the speaker hole for my speaker to fit. Sounds and looks GREAT!



Exactly what I needed

Patrick from Nashville, Tennessee on 5/24/2011

Crutchfield Customer Review (What's this?)

I got this box to hold a JL 8w1v2-4 subwoofer. The box is .38 cuft and the sub called for .375 so it was a perfect match. The box was a whole lot smaller than I expected, and will take very little space up. It is VERY solid. You would have to take a large hammer to it to break it, and that would be after many many hits. The inside wire are thick (at least 18 gauge, looked to be 16 gauge) comign off the input terminals which are high quality. The opening was the perfect size, I pre-drilled the holes to mount the sub and used deck screws to hold it in place. It was extremely solid and very air tight. High quality product and would definitely recommend. Plus it looks good compared to other "flashy" sub boxes out there.




Hands-on research

Product Research


Materials: The Sound Ordnance BB8-35S Bass Bunker is an unloaded, hatchback-style sealed enclosure for a single 8" subwoofer. It is constructed of 1/2" MDF (medium-density fiberboard), covered in black carpet.

Internal Box Volume: The enclosure has 0.38 cubic feet of airspace.

Terminals: The BB8-35S is equipped with a pair of spring-post speaker terminals, mounted in the rear panel. The spring terminals will accept bare wire, pin connectors, and single banana plugs, but are spaced too far apart for dual banana plugs. Inside the enclosure, the terminals have an attached 18" length of speaker wire for connecting the subwoofer.

Brackets: Brackets for securing the enclosure to your vehicle are recommended.

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 verify what’s in the box, 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.

Staff Reviews

Product reviews from the Crutchfield Labs

Video: Sound Ordnance Bass Bunkers
by Zak Billmeier, Jo Greene

Sound Ordnance subwoofer enclosures, called Bass Bunkers, are available to house most standard-sized woofers.

What are the Labs?
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Because I'm building on a budget, and couldn't afford the kicker 12s I want. [ Thomas  Jan 06, 2019 ]
Bought one before and had it stolen out of my car, so this is my second one. They're great, and for the price, can't be beat. [ Mitchell  Dec 29, 2018 ]
needed a small box to fit an 8 in sub in the back of my Jeep, this one had good reviews and would physically fit. [ Patrick  Dec 20, 2018 ]
got 4 hi power 8 inch Fosgates and Polk Audio subs. It is either a small box and find a place for them or zaw saw each door. Gonna see how they sound in a .38 cubic inch box first before i break out the saw [ michael  Oct 17, 2018 ]
seems like a nice solid box [ BRIAN  Sep 17, 2018 ]
I have bought many of these enclosure and love them. [ gomezj22  Jun 03, 2018 ]
Fits under seat of a GMC Sierra extended cab [ Chase  May 10, 2018 ]
Your rep. [ DEXTER  May 08, 2018 ]
Crutchfield delivers quality products every time and thier tech's are very knowlegeable and helpful. [ Tom  Apr 01, 2018 ]
Size [ Abass  Mar 09, 2018 ]
I typically enjoy building my own enclosures, but in this case I couldn't duplicate it for the cost. [ Paul-Michael  Jan 22, 2018 ]
Price and box dimensions almost exact for my subwoofer application [ Robert  Jan 12, 2018 ]
Fit the specifications of the SUB that I purchased and it was the only suggested box. Hoping that it performs well, More to follow.... [ DANIEL P  Jan 12, 2018 ]
I have a 8 inch speaker and needed a good box [ Damon  Nov 26, 2017 ]
I am new to subwoofer market and needed crutchfield to help me match my budget minded Amplifier with affordable enclosures along with the (2) 8inch KICKER subs for awesome BASS !!! So grateful for tech support.MDL [ Michael  Nov 06, 2017 ]
Fit the criteria I needed amp Great Sound ease-of-use great price. [ Samuel  Jul 04, 2017 ]
Right fit for the job. [ John  Feb 16, 2017 ]
Will fit good in the small trunk of my mustang. [ James  Feb 08, 2017 ]
Right size. [ JACK  Feb 03, 2017 ]
Did the trick for my Polk 10" sub. Pleased with purchase, good quality box. [ Pierre  Jan 02, 2017 ]
It was the closest thing to what I needed that crutchfield has wish the cubic foot would be a lil less for my punch 3 shallow mounts [ Cory  Nov 02, 2016 ]
to put an 8 inch speaker in [ joseph  Oct 20, 2016 ]
It looks like it's built well for the price. [ Charles  Oct 06, 2016 ]
User reviews [ Troy  Aug 09, 2016 ]
We are using the sound system in a room, not a car, so a box is the best solution for us. This one is compact, and with stuffing it sounds nice and punchy. Excellent quality for the money! [ Todd  Jul 12, 2016 ]
I ordered this enclosure because it's internal free air space was closest to the JL Audio recommended space for the 8w3 which is the subwoofer I picked up and the box is tuned closest to spec provided by JL for the 8w3, I wanted an 8w7 but the box for it wouldn't fit in my trunk. [ Jacob  Apr 30, 2016 ]
Only box that I found with great reviews. [ Sean  Mar 26, 2016 ]
Speaker required air space was correct [ Steve  Mar 16, 2016 ]
Not many other options for a sealed 8" box. The price point on this model was acceptable. [ DILLON  Mar 16, 2016 ]
Was the correct air space for the sub I'm using [ jeremy  Dec 30, 2015 ]
I am installing twin 8" subwoofers in my Dodge Stealth. There is limited room and these will fit both the back cargo area (flanking) and my Infinity 860w's. I want the tone not to rattle my frame. [ Keith   Dec 05, 2015 ]

5 questions already asked

Have a 2001 F150 extended can and I know it didn't fit under mine. Hope this helps! [ Scott  Aug 25, 2017 ]
For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to determine if this will fit and what you will need for an installation in your vehicle. [ Kenny  Jul 08, 2017 ]  Staff
No, it is not. However, if you mean a required volume of .35 and not 3.5, then yes it will work fine. The difference in volume is insignificant. [ juanita  Jul 03, 2016 ]
I purchased this box for my daughter to use with a Polk 8" subwoofer with similar recommendations. It sounds fantastic in her little Kia Rio. The recommended box volume is just that, simply a suggestion based on the woofer's specifications. Fractional variations in box volume aren't going to have an audible effect on the woofer's performance, so I'm confident you won't be disappointed going with this box. It's very nicely constructed and finished, and a solid value. [ Frank S.  May 22, 2016 ]
I don't know about the RF but the infinity I had in there sounded real nice [ julian  May 21, 2016 ]
They will work together because the volume taken up by the mass of the speaker magnet and structure reduces the internal volume of the speaker box bringing it closer to the recommended volume for the speaker [ juanita  May 21, 2016 ]
Yes. [ PETER  May 21, 2016 ]
Yep. [ Frank S.  Jul 29, 2015 ]
Yes it does [ julian  Jul 29, 2015 ]
It does come with the terminals and wire. It is ready for a speaker. [ Todd  Jul 29, 2015 ]
yes it does. [ PHEALIN  Jul 29, 2015 ]