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Custom Enclosures 12" Round Hole, Long Rear Slot Ported Enclosure

121RP, 121KPRO

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12" Round Hole, Rear Ported Subwoofer Enclosure • Mounting depth: 10-3/4" • Box volume: 2.80 cubic feet • Total port volume: 0.30 cubic feet

Learn more about the 121kpro

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Description


  • 12" Round Hole, Rear Ported Subwoofer Enclosure
  • Mounting depth: 10-3/4"
  • Cutout diameter: 11-1/8"
  • Box volume: 2.70 cubic feet
  • Total port volume: 0.32 cubic feet
  • Dimensions: 15"D x 30-1/4"W x 15"H
  • 30 Day return policy

Product history:

Ground Shaker SQPXL 1 12 thumbnail
(newest, current model)
Custom Enclosures 121KPRO thumbnail
(previous model, replaced by Ground Shaker SQPXL 1 12)

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Specifications & Details


Box/Enclosure specifications
Subwoofer Size
12"
Subwoofer Cutout Shape
Round / Circle
Box Type
Ported
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Cutout Diameter or Length
11-1/8"
Maximum Speaker Depth
10-1/2"
Total Box Volume
2.7 cubic feet
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Binding posts (banana clip ready)
Box Exterior Color
Black
Box Finish
Carpet
Port Details
Number of Ports
1
Port Diameter
13-1/4"
Port Length
17"
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

121KPRO

Weight:

51.00lbs

Internal SKU:

121kpro

Internal Product ID:

14600

Customer Ratings & Reviews


Custom Enclosures 12

5 star
75%
4 star
15%
3 star
10%
2 star
0%
1 star
0%



Durability
4.6
Value
4.6
Features
4.5
Design
4.6
Usability
4.8

Customer Reviews

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Best Bass Pounding Box EVER!!

I have the Hifonics Brutus OLM1612 sub enclosed in this bad boy box and it pounds like no other. Its a very solid box and is true to the dimensions and box volume...I would HIGHLY suggest buying this box to my friends, family or strangers (plus Sonic has the best shipping, was super fast). If you want an all around great looking, great sounding and great performing box...then just click.."+ Add to Cart" button and let the pounding begin!!

By Ryan on August 9, 2010

5 found this helpful


Good prefab box

Box does look clean and nicely built. Put my american bass 12" xfl in it and it pounds! Had to make cut out a lil bigger for my sub to fit but not a big deal recommended for anyone who can't build their own

By Fredy on March 3, 2010

5 found this helpful


Nice Box

dropped my FiQ12 into it...well built and very solid looks really clean with the black carpet

By Blake on December 28, 2009

5 found this helpful


12'' Ported Box

I recenly purchased this box along with the power acoustiq mofo 122x. I tried the mofo in a box i had for two kicker comp 12's, and it didnt sound up to par. When i put it in this box, its like it got 10x louder. And it hits the lows perfect like i wanted. Cant really use my rearview or sideview mirrors.

The box is well built and sturdy. I drive a 99 blazer 2 door btw.

By Cobbsy on January 4, 2012

4 found this helpful


awesome box for the money

I have my Alpine Type R in this and it pounds! I had it in a .8cu ft box I got at bestbuy and it was too small and choked it out, the whole car vibrates now and hits lower notes better, gets those real low ones i love :) only thing I don't like is the port is on the side so its kind of against the trunk, but its far back enough to work so if you have a small car like a civic you just need to measure =]

By Greg on February 27, 2011

4 found this helpful


Destroyed

I got this box for my 12" Fi BTL and it's a great box while it lasted. Now my box smacks wood and sounds horrible i had to put 5 screws to keep it from making that sound. this box is perfect unless you have something pushing to much power like my sub

By SPL on September 27, 2010

4 found this helpful


booom!

This box kicks hard! It makes my JL Audio 12w3v3 hit so harder than it did before in my old 1.3 cu ft ported box. I love it. I would definitely recommend this box and website to anybody. Thanks Sonic

By fern on March 19, 2010

4 found this helpful


Very Nice!

Solidly built, and Creates nice bass. Very good price also. Nice color, and nice to have built-in terminals.

By Nick on September 16, 2008

4 found this helpful


Great Buy! Custom Enclosures 12" Round Hole, Long Rear Slot Ported Enclosure

Bought a big enclosure in order for it to fit exactly in my trunk and wouldn't move and slam around because of my driving :p. I really love it, bass kicks great even of how big it is. It is ported so it helped out from the size. Great Buy! Great quality! Recommend!

By Elder on February 26, 2013

3 found this helpful


Good Deal

Used this box for a Fi Bl 12 and it slammed hard. The tuning frequency is around 41-42 hz so the lows arent very loud and the sound quality isnt always the best but its good for a prefab box. Good box if you dont mind that high of a tuning.

By Main Bull on April 6, 2011

3 found this helpful




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