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Home > Subwoofers > HDC 3.0
HDC3.112 Copper Coil Subwoofer
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HDC3.112 Copper Coil Subwoofer

Item Id: HDC3.112
review 41 Review(s)
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The HDC series isn’t just some off the shelf woofer designed in the virtual world.  It is the product of over two years and hundreds of hours of real world research and development. Many of the HDC’s features are only found on woofers costing twice the price. When compared to our competition the HDC series woofers have more cooling, more throw, more motor force, and stronger cones. These woofers work great in everyday street beating or all out gut wrenching SPL builds. We have spared no expense to give you the best subwoofer value on the market today.

HDC Coils

The HDC comes with your choice of  a four layer, round wound, dual 1ohm or dual 2ohm copper coil.


Suspension systems are generally a weak link in a woofer design, and often the primary reason for woofer failure. Over time, especially in high power applications, suspension begins to sag and as a consequence it can no longer control the voice coil’s movement. This generally results in a torn suspension or smashed voice coil.  To avoid this we use a multiple spider configuration engineered to maintain rigidity over extended periods of heavy use. We also hand glue our triple joints to allow for better glue penetration and saturation of the high stress areas. 


High excursion subwoofers require a lead wire system that doesn’t flop all over the place or break. We use the direct connect system (no terminals) because it works the best. With our direct connect system you get no annoying lead slap noise, no rips or holes burnt in the spiders, and no flimsy lead-in wires.

Note: Parameters taken of random single sampling of NIB subwoofers with no pre-break-in.
Woofer Size10"12"15"18"
Fs41 Hz43 Hz38 Hz31 Hz
Vas9.168 Ltr20.99 Ltr70.421 Ltr109 Ltr
Sensitivity 1W/1m84.439 dB88.172 dB91.532 dB89.8 dB
Magnet Diameter8.7"8.7"8.7"8.7"
Magnet Weight340 oz340 oz340 oz340 oz
Coil Diameter3.0"3.0"3.0"3.0"
Coil Length2.135"2.135"2.135"2.135"
Useable Throw3.0"3.0"3.0"3.0"
RMS Power1500 W1500 W1500 W1500 W
Peak Power4500 W4500 W4500 W4500 W
Mounting Depth7.625"8"8.875"9 3/4"
Circle Cutout9.4375"11.375"14.0625"16.50"

We recommend allowing several weeks of playing time to break in SQ Woofers, full break in may take many months. DO NOT  play subwoofers at max amplifier power in the first couple of days, give the suspensions a chance to loosen up. As the suspension breaks in, the subs will play lower and louder.

Product Specifications subject to change without notice.

Aluminum coil versions are made as ordered, Allow 5-7 working days for build time.
Customer Reviews View All Reviews
Rating No love in MO
I use to run Fosgates and I was all alone. The I heard about SoundQubed subs and amps. 4 HDC3 12's later I am beating the woman off with a stick! Now I am breaking windows and hearts with my HDC3's. Thanks SoundQubed!
  Reviewed by:   from Barnhart, MO. on 2/6/2015
Rating S10 gettin loud
Amazing sub!!! It's in my s10 in a 6th order bandpass first chamber is 2.1ft^3 tuned to 58hz firing into the front chamber that 3ft^3 tuned to 33hz. I have it on a hifonics Brutus 2200.1 at 1ohm on 0ga electrical. Right now on stock battery and alt but upgraded those soon. But this is the best and loudest sub I owned yet. Definitely gettin three more next year for a wall build. Recommend to anyone and Zach knows my buddy Brandon Henley really well which is a big plus!! Thanks for the great quality and price soundqubed!!! Soundqubed FTMFW!!!
  Reviewed by:   from Forrest city Arkansas . on 9/7/2014
Rating Best Subwoofer Purchase EVER
Honestly, if you have the money and time to do all the work of wiring, building a box, and hooking up these woofers, BUY THEM. It cost me around $1200 to get everything i needed for this upgrade so my car would function properly due to the large power demand, but THESE THINGS TURN HEADS ON THE HIGHWAY!!! Do yourself a favor and buy a pair of these.
  Reviewed by:   from Sartell, MN. on 8/29/2014
Rating HDC3 IS GREAT!!!
I bought this subwoofer with high hopes and had it powered off of an AQ1200...and it hit pretty well and everyone was impressed. I now got the newer SQ Q1-1200 which is the same thing different name, and strapped them to one HDC3...WOW This thing is ripping my car apart, make sure you have great electrical for this thing because this sub is POWER HUNGRY!!! 5 stars all the way
  Reviewed by:   from Fort Campbell KY. on 8/7/2014
Rating Impressive
Finally got my hdc3-12s hooked up for couple months now and man these things are loud and reasonably low. They are getting pushed from a aq2200d. I am happy with it all now I just need to install the q-mat it got today.
  Reviewed by:   from Pittsburgh PA. on 6/22/2014
Rating Blow Thru BANGIN!
All I have to say is holy crap! These beasts are AMAZING! running two of these on an AQ 3500.1 and just rips my truck apart. Best products I've ever ran.
  Reviewed by:   from twin Cities, MN. on 6/14/2014
Rating all smiles
Best sub I've ever owned. This thing at half power hits harder than my rock fords I had. I love everything about this sub. Flex is amazing the lows jus make your smile from ear to ear. Buy this you will not regret it.
  Reviewed by:   from springfield. on 5/31/2014
Rating Sh!# Got Real!
When I ordered this Woofer I don't think I realized what i was getting myself into.... My 2200.1 is coming soon. A complete electrical upgrade is necessary If you want to wake this thing up.
  Reviewed by:   from Charleston, SC. on 5/24/2014
Rating Amazed
For quite some time I had been shopping for the perfect setup. I bought one of these because for the price, there isnt much out there to compete. I have had so many variations and setups over my years and nothing, not two 15s, 3 12s or anything I have ever had hit as hard as this sub. Apparently, it can handle much, much more. I have mine on 1 q1-2200d and it destroyed my ported box I had built for it. I think the guys might have underestimated this monster. I cant imagine adding another q1-2200d to this beast, it would be absolutely savage. If you are looking for a sub that does not hit, it kicks like a bucking bull, this is your sub. It gets lower than the two 15s I had. It is such a powerful sub I love it!
  Reviewed by:   from Fla. on 5/17/2014
Rating HDC3.112
purchased 2 of these to replace Alpine Type R, running at 700 clamped RMS. raised SPL from 136.2 to 142.8DB sounds great
  Reviewed by:   from Colorado. on 5/8/2014
Rating awsome sub
I purchased 2 of these subs and wow. they pound the lows and have great sq also.
  Reviewed by:   from ne. on 4/29/2014
Rating 3 hdc3 12s MONSTERS
Recently purchased 3 soundqubed hdc3 12s and my goodness they are monstrous. Got them wired to .67 on my nendo 5500 and it slaps hard. Lows are just as painfully loud as the highs and the build quality is of top notch. All the glue joints are exquisite and nothing bad can be said about this woofer. For the price you will not find a better built, better sounding or louder sub, guaranteed. If you are thinking about purchasing one, ask yourself why just one? And get 3 like I did :)
  Reviewed by:   from Bass head . on 4/4/2014
Rating These are the best subs I have owned
These subs can handle some power!!I have 2 HDC12 dual 2 on a DC 5k runnin .5 an man they handle it!! They are amazing subs well worth the money!I recommend the hell out of them..People still can't believe it 12s...Hell I can't ..Great product Thank you Zack for the quick shipping.. also the more you play um the louder an lower they do get!!!LOVE THEM!! AQ FTW
  Reviewed by:   from Virginia. on 3/17/2014
Rating perfect!!
I've owned many subs and these are by far the best. They hit lows highs and still have good sound quality. I would put these up against my old mtx 9500 12's or the orion hcca 12!!!! Ithey hit so hard and I was really amazed by the size of them. Subs that sounds as good as these and can take the power they can are are twice as much. Buy you will not be disappointed.
  Reviewed by:   from texas. on 3/8/2014
Rating BIG FAN.
I absolutely LOVED my HDC3 12's! By this point, I've already sold them and gotten a pair of HDC3 18's, but I ran the 12's for over a month and loved every minute. They took 5kw daily like champs and did fairly large hairtricks, all while under windowline. They broke my poor car's hatch in 4 places, and necessitated the implementation of a stripper pole to keep my roof from flexing almost 2" peak to peak. I highly recommend these woofers to anyone who wants the most for their money. Great work, guys!
  Reviewed by:   from Tallahassee, FL. on 2/20/2014
Rating Banger!
First off put this beast in a 2.6 Cu.Ft. Ported Box. Then ran the 10gauge into a crap Pyle Pla2988 which said 6000 watts. Only to find out it RMS's at like 500Watts. I then swapped it with a Hifonics Brutus Brx1600.1d And damn this thing is crazy! It rattles and shakes my whole car. I have to dynamat because this thing is a beast! 5 Stars SoundQubed. Ill be back to get another someday!
  Reviewed by:   from Anaheim CA. on 8/8/2013
Rating hdc3 12"
I have two hdc3 in a 4th orderbandpass box tuned to 45 hz. Men can play low and loud. I like the way they sound. Thinks soundque for making great subs for a great price.
  Reviewed by:   from Danville Va.. on 7/21/2013
Rating HDC312 Dual 2 On AQ2200
Got a single HDC312 on an AQ2200 in a Colorado Crew Cab. Tons louder than anything I've owned before from; polk, infinity, RF, alpine, PA. They are in a 2.2 Gross enclosure with a 4" aeroport dimpled and flared on both ends tuned to 32hz. They like higher tuning but I like the lower notes for now until I can get my other enclosure built. I don't have near enough port area and it still makes the roof of my coli flex. The subs get really low don't let the fs fool you they get low and stay clean, especially with clean power. These things are also extremely heavy. No joke quality build. Only complaint is I wish the wires were longer. No regrets though get one!
  Reviewed by:   from Las Vegas. on 6/29/2013
Rating Great Subs!!!
Purchased 2 dual 1ohms, have them seriesed to a final 1 ohm on a Hifonics BRE2100.1d. Box is 4.0 cu. @ 36hz. After a few weeks of break in these babies just got better, and better. My amp is no match for these subs, as I upgraded from type r's that were starting to smell with my Brutus. They need more power, and these are not just spl. The sq is far more than expected. I plan on upgrading to the SQ3500 when funds allow but you will definately enjoy every bit of these subs. Thanks SQ for making my ride sound completely amazing!!!!
  Reviewed by:   from Independence, MO. on 6/25/2013
Rating bad value on shipping
I buy a HDC312 on this site about 6 month ago. I pay 211$ for the sub on a 15% sale. soundqubed put a value of 389$ on my package so I pay the full brokage of 105 $ to UPS. something go wrong with the shipping department, never buy again for sure. put a 2 star because the product is good, but the service is crappy
  Reviewed by:   from Quebec city. on 6/20/2013
Rating Exited yet worried
I ordered some of these yesterday and I accidentally chose d2 Impendance on accident and I need to change that to d1 but they won't answer the phone however they are good about emailing so I sent one regarding this issue since it is still being proccesed so wish me luck and can't wait to order my amp from here so I don't want to lose another 100 bucks for shipping
  Reviewed by:   from Mobile alabama . on 6/14/2013
Rating Slamin 12"
I have 1 of these hdc3 12"in copper coil D1. It is in around a 3 cubic ft box tuned to 38hz. I have 3000watts running to mine it slams in my 97 pathfinder i can bounce a full pack of cigs 5" off my roof. My windsheild flexs along with my wipers. The bass is deep and clear beats harder than any single 12 iv ever heard. Also it comes at a great price what more can u ask in a sub? Clarity, loud deep bass, and cheap. Will always be a sound qubed customer. This sub gets 5done stars and two thumbs up from this basshead.
  Reviewed by:   from Independence missouri. on 5/15/2013
Rating BEAST
I have the copper coil for now, I compete a lot. I got the 2200d to go with the d2 configuration. This gets crazy loud. I have it in a box 2.5ft tuned to 49hz for comps and 35hz for daily. Sealed on the dash did a 144.3. Usaci style did a 146.7. This is from a single 12" sub with zero clipping. Red light doesn't even blink once, so there is more to go. For the money these are probably the best value money can buy when you consider what other top end subwoofers cost and this sub competes and beats them at shows!!
  Reviewed by:   from AZ. on 3/27/2013
Rating Dominates other setups handsdown!
Originally i bought the HDC312 and built a 2.2 cu ft box tuned to 35 hertz, powered by a pr1.1000. on this setup it was dominating other systems with 2 12's! now i'm running an aq2200d to it and it's astonishing with the sound clarity and quality. cant wait to get my second one! Amazing sub, you will not be displeased!
  Reviewed by:   from Key West, FL. on 1/26/2013
Rating HDC3
I've been using these subs over a year now, I have made people with multiple subs feel ashame when my single 12 dominates there setup. I down graded down to one sub, these are amazing. Running it at 4 ohm on a Hifonics colossus with dual 100hr batts. The best sub I have owned.
  Reviewed by:   from Zapata Texas. on 12/28/2012
Rating AQ HDC12-D2, great value plays loud
I bought this single 12 inch about 4 months ago, ran it in a 1.5 cu.ft enclosure with dual 4 inch ports 11 inch long, it was tuned to high (56 Hz) and it didn't play low notes very well, I got it on termlab and it did 134. I should have listened to the Tech section of the SQ/AQ site, made the box 2.1 cu ft and changed the dual 4 inch ports to 19 inch length, it just did a 140.74 db at 43 Hz, which happens to be the Fs of the sub. Plays loud and low, people cannot believe I am just running a single 12" till they look in the trunk !
  Reviewed by:   from Perth - West Australia. on 12/20/2012
Rating Great sub
This sub is absolutely great. I put it in a 2.5 cubic box tuned to 36 hz that I made and hooked it up to my hifonics HFI2000d. It's wired at 1 ohm so it is getting around 1800 watts. It sounds great and is very loud. It is about as loud as my friends set up with 2 JLW612 off of a JL1000/1. I think it is a great sub, I've had zero issues with it and I plan to buy another very soon.
  Reviewed by:   from Atlanta. on 11/27/2012
Rating pound for pound beast mode
Alittle quick story for the fans last year I was stationed in south Korea and I order a hdc3 12 ran it my Hyundai in 3.2cuft on a modded ma audio hk-4000d @ 1ohm tuned to 38hz for everyday bass, I attend every sound off that summer and won all 7 1st place for loudest single sub set. I Love AUDIOQUE KEEP UP THE GOOD WORK
  Reviewed by:   from fort lee. on 9/17/2012
Rating Amazing love AQ/SQ
I've had this sub for about 3 weeks now and Im loving it!! best sub I've got way better then my old Cvx can't wait to give it more power with a 1200D !!! customer for life!
  Reviewed by:   from Hesperia CA. on 7/4/2012
Rating Not bad
Pro: Gets very loud, easily in the 140's for 1 12" sub. Cheap. Cons:Needs a very big box. Settled on 3 cu ft net (after port), Its a bit peaky and hard to get a flat response out of it. Comments: I caution you not to put this sub in a small box. 2.2 was way to small and sounded like total c**p. AQ states rms is 1000w but its way under rated. I put this on a 1200w amp and it was starved of power. Ended up finding the best amp for this sub was the 2200w amp.
  Reviewed by:   from Cincinnati ohio. on 7/1/2012
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