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Hifonics HFX12D4BK + Atrend 12SQL Subwoofer Enclosure

800W Max HFX Series 12" Dual 4-Ohm Car Subwoofer (400W RMS)

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• 800 watts Watts Max
• 400 watts Watts RMS
• Pressure treated foam surround
• Poly-cotton spider
• Heavy duty powder coated steel frame
• Vented aluminum former holds a 2" voice coil

Learn more about the hfx12d4bk_12sql

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This item has been discontinued


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Description


Hifonics brand icon

Authorized dealer

Hifonics HFX12D4BK

800W Peak (400W RMS) HFX Series 12" Dual 4-Ohm Car Subwoofer
Quantity: 1

Product Details:

  • 12" Dual 4 ohm ohm HFX Series Subwoofer
  • Power Handling:
    • Peak: 800 watts watts
    • RMS: 400 watts watts
  • Spade style terminals for easy installation
  • The pressure treated foam surround along with the poly cotton spider helps keep the piston motion of the subwoofer linear and distortion free
  • Specialized Hifonics poly cotton spider, along with the surround, allows the woofer to handle more power with minimum distortions
  • A unique Hifonics heavy duty powder coated steel frame allows back venting, which exchanges heat with cool air, resulting in more power handling and increased reliability
  • Vented aluminum former holds a 2" voice coil while allowing the heat to be exchanged
  • Vented high energy motor assembly with heavy duty magnets increases power handling and increases SPL
  • Top-mount depth: 5.61""
  • Cutout diameter: 10.94""
  • Sensitivity: 86 dBdB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • Priced Individually

Atrend 12SQL

Empty Single 12" Medium Sealed Subwoofer Enclosure
Quantity: 1

Product Details:

  • 12" Single Medium Sealed Subwoofer Enclosure
  • Durable 3/4" Medium Density Fiberboard (MDF) construction
  • Mitered edge construction provides cleaner finish
  • Miter joints feature over 41% more surface area
  • More surface area translates into a stronger bond
  • Dado joints offer 80% increase in surface area
  • Built using trick glue for up to 3600 PSI holding ability
  • Premium charcoal carpet and silver spring-loaded terminal cups
  • Maximum subwoofer mounting depth: 12.4"
  • Subwoofer cutout diameter: 11.12"
  • Total box volume: 1.00 cubic feet
  • Dimensions: 13.50" L x 13.50" H x 13.50" W
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

Hifonics HFX12D4BK, 12SQL thumbnail
(newest, current model)
Hifonics HFX12D4 thumbnail
(previous model, replaced by Hifonics HFX12D4BK + Atrend 12SQL Subwoofer Enclosure)
Hifonics HFi12D4 thumbnail
(previous model, replaced by Hifonics HFX12D4)
Hifonics HF12D4 thumbnail
(previous model, replaced by Hifonics HFi12D4)

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Specifications & Details


Subwoofer Specifications
Series
HFX
Subwoofer Size
12"
RMS Power Handling
400 watts
Peak Power Handling
800 watts
Woofer Surround
Foam
Sensitivity
86 dB
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Sealed
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Spring posts (banana clip ready)
Box Exterior Color
Charcoal
Box Finish
Carpet
Second Width
13.50"
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

HFX12D4BK, 12SQL

Weight:

29.50lbs

Internal SKU:

hfx12d4bk_12sql

Internal Product ID:

192829

Customer Ratings & Reviews


Hifonics HFX12D4BK + Atrend 12SQL Subwoofer Enclosure thumbnail image

5 star
63%
4 star
26%
3 star
6%
2 star
2%
1 star
3%



Durability
4.7
Value
4.8
Features
4.6
Design
4.7
Usability
4.9

Customer Photos & Videos


Customer Reviews

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Nice box

The following review is for 12SQL, which is a part of the bundle you are viewing.

This is a really nice box. I have a Boston Acoustics G5 in it and it pounds!!! I wanted to save space in trunk by switching to small sealed box instead of the big ported I was using previously. I thought I would be taking a hit in SPL but surprisingly I didn't. Just a gain in SQ. And I gained about 50% more trunk space.

By Dangelo on September 21, 2017 Checkmark Icon Verified purchase

42 found this helpful


Good value

The following review is for 12SQL, which is a part of the bundle you are viewing.

Great box for the value. I have a JL 12w6 in it and it sounds amazing. My one issue was the aesthetics, it arrived looking like it needed a bit more carpeting but for the price and sound quality i’ll take it.

By Alex on October 20, 2022 Checkmark Icon Verified purchase

39 found this helpful


Nice box

The following review is for 12SQL, which is a part of the bundle you are viewing.

Good quality good solid box sub sounds awesome in this box

By Mike on December 12, 2023 Checkmark Icon Verified purchase

38 found this helpful


Great Box!

The following review is for 12SQL, which is a part of the bundle you are viewing.

I have an Alpine Type-X 12" Subwoofer that I had put in a ported box. It sounded great and it hit hard. Problem was that it was taking up to much of my trunk space and I wanted some back so I started searching for a sealed box.
I purchased this box after looking through several reviews of the boxes on Amazon. They appeared to be hit or miss. This box appeared solid and a different sized box from this manufacturer had good reviews so I gave it a try.
The box arrived well packaged and in perfect condition and appeared to be well constructed. The Atrend badge easily unscrews off if you would like to remove it. It had enough room on it that I was able to mount my Eclpise ZA1200 directly on to it. Great box for the price.
Now that I have my sub in the sealed box, I have some more trunk room although I sacrificed some bass (not as loud as it was) but I was expecting that to happen.
It is a great box!

By Martin on July 28, 2017 Checkmark Icon Verified purchase

38 found this helpful


The following review is for 12SQL, which is a part of the bundle you are viewing.

I just received two of these boxes today. I put them in my 2017 Chevy Camaro. I have 2 Rockford fosgate P 2's and I have a Rockford fosgate T750X amp pushing them. Have them wired at 1 ohm. Man my system sound so good. If you dont have much trunk space this is the way to go. And the Rockford fosgate setup is amazing.

By Raymond on February 3, 2023 Checkmark Icon Verified purchase

37 found this helpful


Solid!

The following review is for 12SQL, which is a part of the bundle you are viewing.

I put my older P2D4-12 in this after gluing polyfill to the insides. Hits harder than I remember it hitting before. Attend makes SOLID boxes.
Thank you.

By Sozo on November 11, 2017 Checkmark Icon Verified purchase

38 found this helpful


Quality craftsmanship, and a great price!!!

The following review is for 12SQL, which is a part of the bundle you are viewing.

This Atrend 12SQL is a great box for any budget build. Even though it's listed as medium duty I've sampled various 12" subwoofers in this box with different amplifiers at various power levels and not once did it disappoint. This is a box you can install with little or no modifications and be pleasantly happy with the lows it produces.

By David on June 15, 2023 Checkmark Icon Verified purchase

30 found this helpful


Good value.

The following review is for HFX12D4BK, which is a part of the bundle you are viewing.

This is a good value. So far, I'm pleased with the performance of these subs. I'll monitor them for durability and bump up to a better-known brand if they fail. I already had a hifionics amplifier, that I have gotten great performance out of for the past several years.

By Hubert on December 2, 2022

26 found this helpful


The following review is for HFX12D4BK, which is a part of the bundle you are viewing.
By Bradley on November 4, 2022 Checkmark Icon Verified purchase

26 found this helpful


The following review is for 12SQL, which is a part of the bundle you are viewing.
By Josef on December 3, 2024 Checkmark Icon Verified purchase

6 found this helpful




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