Dual 12" QPower Ported Bedliner Empty Subwoofer Enclosure (1.5 cubic ft/per sub) $97.49 + Free Shipping

BraveTeam7995

Jan 12, 2026 9:42 AM

649 Comments

Joined Dec 2021

BraveTeam7995Jan 12, 2026 9:42 AM

649 Comments

not bad ...

spi_911

Jan 12, 2026 1:10 PM

178 Comments

Joined Oct 2011

spi_911Jan 12, 2026 1:10 PM

178 Comments

Man, take me back in time. Back in my civic busting my mtx and my 6x9 in the middle front of my car.

1

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OliveAction3928

Jan 12, 2026 1:33 PM

14 Comments

Joined Aug 2024

OliveAction3928Jan 12, 2026 1:33 PM

14 Comments

i was very excited to get this QBOMB12 & wasted my time painting it white to match my trunk/boot, cuz it's hard to find dual 12" vented/ported subwoofer enclosures of such minimal depth where most vented boxes are like 17+" D & take up half of my trunk/cargo space but this QBOMB12 has a depth (from front face where woofers mount, to the back where u typically find the speaker connections/posts/terminals but some boxes have connections on the side while few have them on top of box & even fewer on bottom) of 13.25" which is comparable to a lot of dual 12" sealed/non-ported boxes.
However in hindsight i've come to realize that ported boxes are (i won't even type "Best" here) ONLY suited for a specific subwoofer in a specific location of a specific vehicle facing a specific direction or any sub w/ same or extremely similar acoustic characteristics bound by same environmental/mounting parameter specs..
Sealed boxes offer infinite simplicity over ported as the amount of cone resistance is held relatively constant over the entire range of frequencies audible to man (relative as in non-linear where more watts @any freq encounters higher resistance/reflex @that freq..) but vented enclosures got ports tuned to/for specific applications where port diameter, length, and location/box placement (along w/ overall box volume) all narrow down the list of subs that would sound hard/loud in the ported box; like for ported, i'd either design a custom box to suit the box parameters defined by the sub maker in the Specs section of their owners manual or get a prefab box where the box includes the woofers, esp if box & subs are same maker as they've ENGR'd or tuned or optimized them to work together.
I tried this QBOMB12 box w/ all my 12s and amps but found that beyond the narrow range of frequencies that the port is tuned to (essentially a user-defined limit on the rate @ which air escapes the enclosure for any given freq), no amt of power or speaker wattage sounds good except a specific sub & amp cuz too many variables must align or u get fluttering (which shortens sub longevity & wastes electricity) or some other type of audible distortion like crackling or excessive echoing or otherwise compromised/sub-optimal cone excursion, frequency response range, sensitivity, signal-to-noise ratio, Total Harmonic Distortion, suspension resonance.. although in that narrow range or particular frequency to which the port is tuned, i'm confident that any quality sub will punch 10x above its weight!
last thing i'll share abt this: save longer if u must but do spend the $150-ish USD for ea quality 12" woofer so ea can handle a root mean square (RMS) of at least 300 watts cuz unbeknownst to me, u can save a small fortune where 12" subs of 100-150 watts power handling RMS can be scored for half the price, inevitably they blow after 2-3 yrs irrespective of brand cuz they all gotta compete in every segment including cheap entry-level low-cost/low-quality.. but higher wattage subs sound deeper if ur amp not maxed and even @2x the cost, higher wattage subs last at least 10x longer than cheap starter ones that handle up to 150 watts; this is how i learned the true meaning of "too broke to buy cheap" but too bad it came too late when i'm too old and respected by too few for being too much of a basshead4life!
sorry for lack of brevity and logical flow, and in case the pics didn't also convey this to u, i'm simply depressed (if u'll pardon my candor)

Last edited by OliveAction3928 January 12, 2026 at 05:38 AM.

multiuseemail

Jan 12, 2026 2:34 PM

970 Comments

Joined Oct 2020

multiuseemailJan 12, 2026 2:34 PM

970 Comments

Quote from spi_911

:

Man, take me back in time. Back in my civic busting my mtx and my 6x9 in the middle front of my car.

I had an '88 corolla hatch which barely fit a box similar to this. Those were the days.

I enjoy a nice balanced sound today - even lowering the SUB / BASS at times when needed.

My how times change.

MxChris

Jan 12, 2026 6:37 PM

2.1K Comments

Joined Nov 2006

MxChrisJan 12, 2026 6:37 PM

2.1K Comments

Tuned to 40hz, 3/4" MDF structure and the mounting face is 3/4" MDF. This is for people that don't know any better, it's a basic pre-fab that's tuned too high and will flex too much. If this is your budget you can do much worse, would be best in an SUV where it can reflect off the glass.

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SIX29P

Jan 12, 2026 11:22 PM

923 Comments

Joined Jul 2019

SIX29PJan 12, 2026 11:22 PM

923 Comments

1990 Geo Prism + 2 12's RF + a budget 1000 wat Pyramid amp + Sony Header + dynamat and no car alarm on the block stood a chance!

sup3rson1c

Jan 13, 2026 3:22 AM

3K Comments

Joined Oct 2008

sup3rson1cJan 13, 2026 3:22 AM

3K Comments

Quote from spi_911

:

Man, take me back in time. Back in my civic busting my mtx and my 6x9 in the middle front of my car.

Lmao. I tried a "center channel" to try and focus the image back in the early 90's then learned better.

sup3rson1c

Jan 13, 2026 3:24 AM

3K Comments

Joined Oct 2008

sup3rson1cJan 13, 2026 3:24 AM

3K Comments

Quote from SIX29P

:

1990 Geo Prism + 2 12's RF + a budget 1000 wat Pyramid amp + Sony Header + dynamat and no car alarm on the block stood a chance!

God, the Pyramid amps

Dual 12" QPower Ported Bedliner Empty Subwoofer Enclosure (1.5 cubic ft/per sub) $97.49 + Free Shipping

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