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Harmony Audio HA-BV2X12E Dual 12 Empty Vented Port Sub Box Unloaded Enclosure

Based on 3 reviews
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Harmony Audio proudly introduces you to our HA-BV2X12E sub box. Built for bass and constructed from the highest quality MDF, this box makes sure you get above and beyond the sound quality you're looking for. Couple this box with your favorite Harmony Subs to achieve the thunderous bass you desire.

On the front of the enclosure you'll find dual kerf style ports, positioned to give you the most acoustic efficiency, allowing incredible bass with even the smallest amount of power from your amplifier. Typically kerft style ports are only found on the most high end, professional boxes with a hefty price tag. Well, not anymore. Utilizing the curves of the box, the kerf ports allow the box to produce deeper and more accurate bass.

Strength and integrity is a staple of how our Harmony boxes are designed. The HA-BV2X12E is crafted with high quality 3/4in MDF and a 1in baffle. The interior of the box is specifically designed to handle even the most powerful of subwoofers. Lined with poly-fill and braced to take a punch, even our monsterous HA-ML122 monolith sub wouldn't be able to break this box!

None of that truely matters if it doesn't look good, right? The sping loaded terminal has a clean, recessed design to keep your wires safe, while looking gorgeous. Color coded, and pre-wired on the inside, it's never been easier to hook up your subs. The smooth black carpet gives the enclosure a sleek, redefined look. Match that with the custom embroidered Harmony Logo, and everyone will know that you're living life in Harmony.

Harmony Audio HA-BV2X12E Dual 12" Empty Vented Port Sub Box Unloaded Enclosure


  • Empty Dual 12" Vented Sub Box
  • Enclosure Baffle: 1" MDF Wood
  • Enclosure Material: 3/4" MDF Wood
  • Cut Out: 11" Diameter
  • Mounting Depth: 11 3/4""
  • Spring Loaded Terminal Cups
  • Pre-Wired Terminal Cups
  • Box Dimensions: 33.75" x 18.75" x 16.5"


  • Compact Design Ideal for Trunk
  • Custom Designed Vented Kerf Port
  • Durable OEM Grade Black Carpet
  • Embroidered Harmony Audio Logo
This item is New
Proposition 65 Warning for California Consumers

WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to

Ratings and Reviews


3 product ratings

Well done

Oct 1, 2022

Very well made and produces excellent bass. Running 2 DDX scars and it bangs. Really hard. Would recommend this box for any 12

Apr 14, 2023


Great pre fab!

Jun 28, 2023

construction of this box is fantastic. Everything is glued and reinforced with heavy duty wood staples. It’s got 45’s at the angles, and the face is honest 1” MDF! Harmony says it’s tuned to 32hz, which I have no reason to doubt. The only criticism is that I’m unsure of the exact volume. I’ve seen people quote it at over 2 sq/ft per sub, but thats if you go by external dimensions. There is a lot of porting structure which takes up significant space. I’m using two CT Sounds subs with a recommended 1.75 each and this box sounds amazing. Oh, another small criticism, this is not what I understand a kerf port to be. But again, doesn’t matter. This sounds and works great.

Questions & Answers


What is the tuning of this enclosure?


Hello John,

Thank you for your inquiry! This box is tuned to 34 Htz.

Hope this helps!


what is net internal volume of the box?


The box's volume is approximately 1.95 cubic ft per subwoofer chamber.

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Return Policy
You may return this item in its original condition within 60-Days for a refund, minus a 20% restocking fee, and minus any shipping charges we paid to get the item to you.