Crutchfield - North America's electronics authority since 1974

1.888.955.6000
 
 
Free Shipping on Everything.  60-Day Money-Back Guarantee  |  Lifetime Tech Support
 

Boston Acoustics G112-4

12" 4-ohm subwoofer

Zoom Boston Acoustics G112-4
Front
Video loading and will display in just a moment.
Photos
Boston Acoustics G112-4
 
Videos
 
We don't check this item for fit or compatibility.

Item# 065G1124 offer details

Item# 065G1124

Review Summary

 
DISCONTINUED
 
This item is no longer available to purchase.
 
Contact us for other options
 
Call   Email  
 
Looking for a similar item?
 
 
 

By buying this product you'll earn up to 65 Rewards points.

When you sign up for a Crutchfield account, you’ll be enrolled in Crutchfield Rewards. You’ll earn one point for every dollar you spend on gear from us. You can turn your points into Rewards Cards that you can use toward future purchases. You can sign up for an account now, or after you complete your purchase (you’ll get credit for the points either way).

 

Our take on the Boston Acoustics G112-4

If you appreciate value and performance, check out Boston Acoustics G1 subwoofers — you'll be hard-pressed to find comparable performance and features in other subs in this price range.

The G112-4 12" subwoofer's hefty foam surround allows plenty of cone excursion for deep, powerful bass. The sub's design optimizes performance in small sealed or ported boxes — perfect if vehicle space is tight. Integrated sealing gaskets ensure an airtight fit when mounted in a sub box.

This sub will hold up when you drive it hard, thanks to its heat-dissipating vents. Boston's SureSet™ system incorporates replaceable fuses that protect the sub from power overloads.

Highlights:

  • 12" 4-ohm subwoofer
  • co-polymer cone with foam surround
  • RadialVent cooling
  • SureSet overdrive protection
  • power range: 50-200 RMS watts
  • frequency response: 20-350 Hz
  • sensitivity: 87.7 dB
  • mounting depth: 5"
  • sealed box volume: 1.00 cu. ft.
  • ported box volume: 2.00 cu. ft.
  • warranty: 2 years
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs

Features and Specs
Size
Loading...
12 -inch
Impedance
Loading...
4 ohms
Cone Material
Loading...
Copolymer
Surround Material
Loading...
Foam
Ideal Sealed Box Volume (cubic feet)
Loading...
1
Ideal Ported Box Volume (cubic feet)
Loading...
2
Port diameter (inches)
Loading...
4
Port length (inches)
Loading...
13
Free-Air
Loading...
No
Dual Voice Coil
Loading...
No
Sensitivity
Loading...
90.6 dB at 2.83 watts
87.7 dB at 1 watt
Frequency Response
Loading...
20 - 350 Hz
RMS Power Range (Watts)
Loading...
50-200
Peak Power Handling (Watts)
Loading...
---
Top Mount Depth (inches)
Loading...
5
Bottom Mount Depth (inches)
Loading...
5 7/16
Cutout Diameter or Length (inches)
Loading...
11 1/16
Vas (liters)
Loading...
114
Fs (Hz)
Loading...
25
Qts
Loading...
0.46
Xmax (millimeters)
Loading...
10.5
Parts Warranty
Loading...
2 Years
Labor Warranty
Loading...
2 Years

Product Research

Product Research
What's in the box?

Download owner's manual

  • One 12" woofer
  • 1 Rubber gasket (installed)
  • 8 Self-tapping screws
  • Specifications sheet
  • Warranty sheet
  • Product Registration card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Enclosure Recommendations

Features

RadialVent Cooling Technology: The Boston Acoustics G1 series subwoofers feature patented RadialVent cooling technology, which directs airflow around the 2-inch/4-layer voice-coil for increased power handling.

Materials: The G112-4 woofer has a co-polymer woofer cone with a raised polypropylene dustcap and a large foam surround. The wrap-around gasket gives you a good seal whether you top-mount or bottom-mount the woofer.

SureSet: The speaker terminals are equipped with two 4-amp mini ATC fuses, which provide voice-coil protection under transient conditions such as accidental momentary overdrive.

Note: The fuses do not protect against voice-coil failure resulting from long term high power abuse.

Terminals: The woofer has rugged spring post terminals that accept up to 8-gauge bare wire or pin connectors.

Long Excursion: The woofer has a 1-3/4-inch peak-to-peak excursion for accurate deep bass output from a small sealed enclosure.

Enclosure Recommendations

Sealed Enclosure: The G112-4 woofer is optimized for use in a small sealed enclosure with a 1.0 cu. ft. internal volume.

Ported Enclosure: The woofer can also be used in a 2.0 cu. ft. ported enclosure with a 4" diameter, 13" long port, tuned to 34Hz.

 

Product Reviews

Review Summary

Average Customer Review:

5 people say:
(3)
(1)
(1)
(0)
(0)

1 customers also rated:

"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Review title
* Email
Your email won't be visible. Please use the email address that is associated with your order.
Display name
(e.g., JohnD) Your review will be signed using the display name and location
* Your location
(e.g., Charlottesville, VA)
* Your rating
Click on a star to rate the overall product on a scale of 1-5
Rate the following specific attributes
  Value
 Sound Quality
 Ease of Use
 "Coolness Factor"
 Build Quality
1500 characters left * Your review
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
Submit the URL of your YouTube™ video review or product demonstration. e.g., http://www.youtube.com/v/o79TWHh598U
500 characters left Pros
500 characters left Cons
* Agree to Terms
By checking this box you agree your review becomes the property of Crutchfield, that you are over 18 years of age, that you own or have owned this product, and that you are located within the United States or its territories. Please see our Review Guidelines for more information. We reserve the right (but are not obligated to) review all submissions and edit or remove any review in any manner which we deem necessary. Your review should be posted within seven days.
1-5 of 5 items Sort Results By: Date Reviewed | Rating | Helpfulness
 
5 out of 5

Boston Acoustics G112-4

Written By EBS, Orlando, fl on Sunday, June 28, 2009
 
I have a pair of these in a 06 Kia Spectra SX sedan. They are in a dual sealed box/enclosure and they are wired in parallel. I have them powered by an Orion Cobalt CO 800.1 amp. These subs are getting 400 watts each and they have never let me down yet. They sound good with all types of music and they are more of sound quality subwoofer and not a SPL sub like the Kicker CVR for example. If you want a sound quality system then go with these but if you are bass head then go with the Kicker CVR. Also I went with these subwoofers because I do not have to reseal my rear [back] windshield every time. This is good sub for house music because I listen to it all the time.
Was this review helpful?    Yes | No
 
5 out of 5

Boston Acoustics G112-4

Written By Squadfer, Houston, TX on Tuesday, May 26, 2009
 
I've been playing electric bass guitar/upright bass and tuba for 7-9 years now so I know what bass is suppose to sound like in its natural acoustic form. This sub replicates the natural sound of bass with great clarity. Most of the time when you hear other sub's you just hear vibrations without the clarity of it being a single note. Right now I have this sub in an enclosure that I built to the specs of the sheet that came with the speaker and I'm running a kenwood 200 RMS to the sub. For rock and country music this sub is really clear and just accents my door speakers without being overkill. On rap and electronica this sub will let you know that it is inside your car. For me having the two completely different styles of music being played through the same sub without sacrificing one style for the other style is a really big plus.
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Awesome Subwoofer!!

Written By AJG, Spokane, Wa on Tuesday, March 13, 2012
 
I have gone through 3 Alpine Type R's using the PDX1.600, after my warranty ran out on the Type R's. I saw that this was 1/2 off I had to order it because the price break was more than then actual sub itself, and have a set of Boston computer speakers that have never let me down! After receving the subwoofer I was a little sceptical because it looked pretty shallow, and the magnet was smaller then that of an Alpine Type E. After messing with the Gain on my amp I didn't even have to break it in cranked the gain to full and it RAILS in a sealed .95 box!!! I have to say its not quite as deep as a Type R (much bigger magnet and four times the price with warranty) but for a cheep sub it has really thrown me off! I probably will stick with the Boston brand from now on. Sweet sub, no regrets.
Pros:
Takes all of the clean 681w my PDX can push through it.
Cons:
Blew a fuse (fuses being the coolest idea ever) and had to unscrew it from the box to replace, kind of a pain, but WAY better then toasting the sub. Replaced with 5 AMP (instead of 4 AMP) and good to go all day!
Was this review helpful?    Yes | No
"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
4 out of 5

NIce sounding Subwoofer

Written By AaronF, southern NJ on Monday, September 19, 2011
Crutchfield Customer Review (What's this?)
Crutchfield Customer Review

The reviewer purchased this item from us, verified by the email address on the order.

 
I bought this sub a few weeks after I purchased Boston Acoustics speakers for my 1994 Mercedes-Benz C280, It had the bose system, but I replaced it. The speakers sounded great on their own, but needed some help down low, so when I saw this sub on sale, i couldn't resist. It has a low RMS rating, which was perfect for the 4ch amp (MB Quart) I was going to be using to power the speakers and the sub off of. Speakers get 50wRMS a piece , and the sub is at a perfect 200wRMS. Overall the sub puts out plenty of nice sounding clean bass in the Sound Ordnance sealed enclosure that came free with the sub.It's Not going to be heard outside of the car, but inside is very nice sound, that actually hits pretty hard.I'm Highly impressed with Boston Acoustics' products.
Was this review helpful?    Yes | No
 
3 out of 5

Decent, but Nothing Special

Written By tower, Houston, TX on Friday, November 21, 2008
 
Boston's entry level 12" sounds okay, but can't take a whole lot of power. Its only real perk is its shallow mounting depth, allowing it to fit into slim
truck boxes easier than most subs (thinner than a JL 12W1). My biggest complaint would be the fuses they put on them, which are supposed to prevent you from blowing them, but end up just being a pain.
Was this review helpful?    Yes | No
 
1-5 of 5 items

Learn more about Component Subwoofers

Learn more about Component Subwoofers

Subwoofer Shopping Guide

Subwoofer Shopping Guide

Ken Nail
7/13/2008
based on 260 ratings (18 comments)
 

Subwoofers are speakers dedicated solely to reproducing low frequencies. No matter what kind of music you like, or at what volume you listen to it at, they can be a crucial part of your overall...

 
Video: How to Choose a Subwoofer

Video: How to Choose a Subwoofer

Ken Nail
9/14/2010
based on 468 ratings (23 comments)
 

The first step to choosing a subwoofer actually begins with the enclosure and how you want the sub to perform. In this video we'll tell you about the different types of subwoofer enclosures...

 
Dual Voice Coil Subwoofers

Dual Voice Coil Subwoofers

Crutchfield Writing Team
6/16/2003
based on 144 ratings (209 comments)
 

Dual voice coil subwoofers are a popular choice among car audio enthusiasts who want more flexibility in wiring their sound systems.

 
Subwoofer Enclosures

Subwoofer Enclosures

Crutchfield Writing Team
3/12/2012
based on 319 ratings (58 comments)
 

The type of bass you get from your component subwoofer doesn't depend on the woofer alone. You'll need a strong, tightly constructed enclosure for optimum subwoofer performance.

 
Tuning Your Subs

Tuning Your Subs

Buck Pomerantz
12/9/2011
based on 287 ratings (93 comments)
 

Having a subwoofer in your car is a good thing, but if the subwoofer isn't properly tuned, it won't sound as good as it should. This article describes how to adjust your amplifier so that your...

 

Accessories

Things you'll need

Sealed & Ported Boxes
Choose a sealed or ported box to house your subwoofer.
Sound Ordnance™ Bass Bunker
Sealed single 12" subwoofer enclosure (Model BB12-95S)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-150V)

Also available in:
Scratch & Dent: $50.99
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-200V)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported dual 12" subwoofer enclosure (Model BB122-175V)
$79.99
In Stock
 
 
Show more items

Accessories we recommend

Speaker Wire
It's critical to have good wire, and none is included with the sub.
StreetWires 12-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$1.00
In Stock
 
 
StreetWires 14-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$0.75
In Stock
 
 
StreetWires 14-gauge Super Cable™ Speaker Wire
Translucent blue jacket — priced per foot (Clear)
$0.99
In Stock
 
 
StreetWires 16-gauge Super Cable™ Speaker Wire
Blue jacket — priced per foot
$0.40
In Stock
 
 
Stinger PRO Series 16-gauge Speaker Wire
Black jacket — priced per foot
$0.30
In Stock
 
 
Show more items
Dynamat
Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car.
Dynamat 19100
License Frame Kit
$14.99
In Stock
 
 
Dynamat Xtreme Wedge Pack
1 sheet, 4 square feet
$39.99
In Stock
 
 
Dynamat SuperLite Tri-Pak
Triple package — 3 sheets, 12 square feet (Model #10612)
$69.99
In Stock
 
 
Dynamat Xtreme Trunk Kit
5 sheets, 20 square feet
$169.99
In Stock
 
 
Dynamat Dynaliner
One 54" x 32" sheet (1/8" thick)
$69.99
In Stock
 
 
Show more items
Box Hardware
These can be useful if you are building a custom box.
Springback Handle
$9.99
In Stock
 
 
Corner Protectors
$9.99
In Stock
 
 
Rubber Feet
$5.99
In Stock
 
 
Speaker Wire Terminals
If you're building your own sub box, add speaker wire terminals for easy speaker wire connections.
Metra Speaker Terminal
Round terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Metra Speaker Terminal
Round terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Show more items

Extras

Test Discs
Autosound 2000 discs are designed to test specific performance parameters of your vehicle's audio system.
Autosound 2000 CD Set
$69.95
In Stock
 
 
 
Add selected to cart
 

For a more in-depth review and enhanced detailed information on the Boston Acoustics G112-4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_065G1124/Boston-Acoustics-G112-4.html ).

Sorry, the Boston Acoustics G112-4 is no longer available for purchase.

Boston Acoustics G112-4