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Sonic Sub Box: 3SLD12-3.8

Triple Slot 12" Sealed MDF Enclosure

4.0

(3 reviews)

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The product on this page is discontinued.

Sonic Sub Boxes are custom built to fit your application. Enclosures are made with only the highest quality materials, including 3/4” MDF, to ensure your subwoofer enclosures can handle the test of time and the thump of your new subs.

  • Triple Slot 12" Sealed MDF Enclosure
  • Holds three 12" subwoofers
  • 3/4 MDF (Medium Density Fiberboard) Construction
  • Durable Gray carpeting
  • Gold Terminals
  • Internal Box Volume: 3.8 cubic ft.
  • Dimensions: 17"D x 39"W x 14"H
  • 30 Day return policy
Speaker Box / Enclosure Specifications
Subwoofer Size12"
Subwoofer Cutout ShapeRound / Circle
Box TypeSealed
Number of Subs/Speakers3
Box Style/ShapeSquare/Rectangle
Cutout Diameter or Length11-1/8"
Maximum Speaker Depth16"
Total Box Volume3.8 cubic feet
Height14"
Width39"
Depth17"
Second DepthN/A
Wood Thickness3/4"
Number of Terminals3
Terminal TypeBinding posts
Box Exterior ColorGray
Box FinishCarpet
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty DurationNot warranted
Labor Warranty DurationNot warranted
Warranty ProviderSonic Electronix
Customer Review Summary for Sonic Sub Box: 3SLD12-3.8
Average Customer Rating is 4.0 out of 5 stars:
4.0
based on 3 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
33%
4 star:
.
.
33%
3 star:
.
.
33%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
3.3
Value
4.0
Features
3.7
Design
4.3
Usability
4.0
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
March 10, 2010 tspencer
Review by
tspencer from crawford, ms
Overall
Durability
Value
Features
Design
Usability
with 3 mtx 9500 the box just comes apart. if you dont have that much power this would be an ok buy but for me i just have too much power for the box to handle
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February 26, 2009 Does the job
Review by
Michael from Chicago, IL
Overall
Durability
Value
Features
Design
Usability
Pretty solid box. Decent airspace, primarily depends on what type of subs you use.
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January 25, 2008 awsome
Review by
andrew from Arlington, TX
Overall
Durability
Value
Features
Design
Usability
I bought this about three months ago and it is by far the best box i have ever bought. it is worth the price.
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Amplifier Kits
Complete your system with all the wires you need to properly install and power your amplifier.
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0/1 Gauge - Kicker Dual Amp Kit0/1 Gauge - Kicker Dual Amp Kit
Dual amplifier installation kit with distribution blocks designed for systems up to 3000 watts.
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4 Gauge  - StreetWires Amp Kit4 Gauge - StreetWires Amp Kit
4 Gauge (AWG) ZN1 Series Single Amplifier Installation Kit
$37.99
Speaker Wire
This is recommended speaker wire you can choose from that would be best for your subwoofer or speaker set-up. The higher quality of speaker wire used, the better sound you will get from your system.
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Kicker Speaker WireKicker Speaker Wire
20 ft of 12 Gauge XW-series speaker wire with twisted pair technology for noise cancellation and bass response.
$24.49
High-Performance Streetwires Speaker WireHigh-Performance Streetwires Speaker Wire
25 ft. of 12 Gauge speaker cable with twisted pair construction for improved power flow and fine-stranded copper windings.
$29.99
Sound Dampening Material
Get the most of your new sound system with high quality sound dampening material. Helps eliminate road noise while keeping your music in the car.
 ProductPriceAdd?
36 ft. of Dynamat Extreme Bulk Pack36 ft. of Dynamat Extreme Bulk Pack
Make your sound system sound perfect by reducing road noise with 9 sheets of sound dampening material.
$159.99
20 ft. of Dynamat Xtreme Trunk Kit20 ft. of Dynamat Xtreme Trunk Kit
Keep your trunk from rattling and improve bass quality by using a sound dampening trunk kit.
$94.99
Enclosure Accessories
Everything you need to install your subwoofer. From quick disconnects to polyfil, whatever you need will be here.
 ProductPriceAdd?
Banana Clip TerminalsBanana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
Insulated Female Quick Disconnect ConnectorsInsulated Female Quick Disconnect Connectors
100 pack of 12-10 Gauge yellow insulated quick disconnects.
$7.99
Spring Post Terminal CupSpring Post Terminal Cup
Makes adding a spring post terminal to an enclosure simple! Banana clip ready!
$2.99
20 oz. Bag of Poly-Fil20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles or can be used for your polyfil.
$5.99

Product Summary

Manufacturer: Sonic Sub Boxes
Model number: 3SLD12-3.8
Weight: 54.00 lbs
Internal SKU: 3sld1238
Internal product ID: 7585
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Customer Testimonial

I had recently purchased 2 set of Rockford Fosgate T1652 speakers. These are excellent speakers and i received exactly what i ordered,in an expeditious manner. Sonic Electronix is one of those companies that prides itself on service and that is why i would not be hesitant to use them again.

- Terry Bosak from Litchfield Park,AZ

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