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Boston Acoustics G108-4

8" Single 4 ohm G1 Series Car Subwoofer

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8" Single 4 Ohm G1 Series Subwoofer • 200W RMS • SureSet™ Impedance Selection • RadialVent® Cooling • Shallow Rear Draft • Integral Sealing Gaskets • 4-Layer Voice Coil • Standard And Inverted Mounting

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Product Highlights


8" Single 4 Ohm G1 Series Subwoofer • 200W RMS • SureSet™ Impedance Selection • RadialVent® Cooling • Shallow Rear Draft • Integral Sealing Gaskets • 4-Layer Voice Coil • Standard And Inverted Mounting

Description


Getting started with Boston Acoustics's G1 Series

G108-4 subwoofers are perfect when looking for factory replacement subwoofers that will hit hard and clean. The single 4 ohm voice coil allows you to run the sub at a very efficient 4 ohm rating on just about any amplifier. Or it allows you to add an additional subwoofer for more bass and a variety of wiring configurations to better suit your needs and budget.

Boston Acoustics is well known for their amazing quality and products in the home audio world. Their dedication to quality and performance is seen in all of their products, including the G1 series subwoofers. Available in an 8", 10", and 12" size woofer along with the option of either a single 4 ohm voice coil or dual 4 ohm voice coil for multiple wiring options that better suits your personal needs. All G1 series subwoofers are equipped with Boston Acoustics specific technologies such as SureSet™ impedance selection that makes wiring easy and accurate as well as adds protection from overdrive to the voice-coil. G1 subs also feature a RadialVent® cooling system that decreases heat dissipation as well as distortion cause by thermal discharge. This improved the subwoofers ability to perform at higher power handling levels while still producing quality bass output. All G1 series subwoofer feature a co-polymer woofer cone and foam surround for rigidity and increased excursion. So if you are looking for entry-level bass from a product that will still deliver high quality performance, the G1 series subwoofers are the perfect match at a competitive price.

General Features:
  • 8" Single 4 Ohm G1 Series Subwoofer
  • Power Handling:
    • RMS: 200 watts
  • Impedance: Single 4 Ohm
  • Co-polymer woofer cone
  • Foam woofer surround
  • SureSet™ impedance selection and overdrive protection
  • RadialVent® cooling which increases power handling
  • Shallow rear draft allows for a decreased mounting depth
  • Integral sealing gaskets simplify both standard and inverted mounting
  • 1-1/2 inches of peak-to-peak excursion
  • 2" 4-layer voice coil
  • Cutout Diameter: 7"
  • Mounting Depth: 4-1/4"
  • Frequency response: 30-350 Hz
  • Sensitivity: 87.6 dB
  • 1-year Manufacturer's warranty

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Boston Acoustics G108-4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Boston Acoustics G108-4 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Boston Acoustics G108-4 Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Boston Acoustics G108-4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


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Specifications & Details


Subwoofer Specifications
Series
G1 Series
Subwoofer Size
8"
RMS Power Handling
200 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohm
Frequency Response
30 - 350 Hz
Sensitivity
87.6 dB
Xmax (millimeters)
10.5 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Copolymer
Woofer Surround
Foam
Subwoofer Grille
No
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Minimum Sealed Box Volume
0.30 cubic feet
Maximum Sealed Box Volume
0.30 cubic feet
Minimum Ported Box Volume
0.80 cubic feet
Maximum Ported Box Volume
0.80 cubic feet
Top-Mount Depth (Mounting Depth)
4-1/4"
Cutout Diameter
7"
Shallow Mount Installation
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

G108-4

Weight:

11.00lbs

Internal SKU:

g1084

Internal Product ID:

18534

Product and How-to Videos


Customer Ratings & Reviews


Boston Acoustics G108-4 thumbnail image

5 star
89%
4 star
0%
3 star
11%
2 star
0%
1 star
0%



Durability
4.6
Value
5
Features
4.8
Design
4.8
Usability
4.8

Customer Reviews

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Nice small subwoofer

I purchased a pair of these for a custom down firing subwoofer in my van. They seem well made and sound great. Plenty of bass for my needs - I usually listen at moderate volumes. I would buy them again.

By John on September 12, 2011

19 found this helpful


excels in sound quality

These are for listeners not spl..3cu.ft.sealed enclosure, had a lot of subs,high end ones too,this little speaker is phenomenal. Have 2 of them with 500 watts to them, bout all they can take. Seems like they get better every day. Have fun, Thankyou Sonic awesome store great prices!

By orvis on March 30, 2011

18 found this helpful


This guy does not disappoint

I have two of these little guys in a .3CuFt each. They are running on an MTX mxa8001 amp. Thats 800watts to these little guys that are rated for 400watts. I know, thats awesome right. They provide nice deep, not extremely loud but deep, clean notes and can easily keep up with double kick drums of rock and metal. They hit lower then my 10" MTX thunder 9500 but not as loud for obvious reasons. I recommend these to anyone who is looking for a sub with a small footprint in the trunk and clean sound. Don't have any cons for these guys; price is awesome, sound is awesome, therefore a great buy.

By Spice on October 20, 2010

18 found this helpful


Ok for the Money

It sounds ok for what it is, it doesn't hit the really low notes like a 10" or 12" subwoofer but is very musical. One of the wires came loose after about a month and I had to solder it back on, other than that it has worked great.

By Michael on June 27, 2011

17 found this helpful


Great Value

Replaced Polk speakers in my Jeep with these running off a pioneer head unit, much louder and better sound quality. Fast shipping and great price

By Michael on September 28, 2020 Checkmark Icon Verified purchase

14 found this helpful


Excellent little speaker

I mounted a single 8" in the arm rest area between the rear seats of my 2003 Chrysler 300M. Would have not believed it was possible to get that kind of performance out of such a small speaker. Putting about 400 watts to it. Been using it for 6 months. Getting ready to a new set up in the rear deck of my mustang using the same speakers.

By Parker on January 20, 2012

16 found this helpful


Awesome sound

This is the best sounding 8" sub I've heard

By AG on July 19, 2011

15 found this helpful


g108-4

I bought this here. It has great deep bass for an 8 inch". Mind you its not earth shattering, it is clean and plays all low frequencies very well. I would recomend it for those who want a clean sound quality vehicle without the over pronounced boomy bass most subs have.

By toodles on October 9, 2011

14 found this helpful


Great Sub

Was I Surprised !!! I put it in a .318 foot sealed box, Just needed enough bass for an SQ system. This sub sings very sweet, Couldn't resist an spl test though lol... It hits really hard and true. Was shaking my Ram pu truck like I was off roading, Can't see out the mirrors, Going to make me sick. I should get another one of these to shake the dirt off the outside. I have to say that my Infinity 10 inch that I paid more than twice as much for doesnt keep up with this in either SQ or SPL. And it's great for clean sound. Buy one and be prepared to be impressed. I love this little sub and its little footprint . Is the best sub I have owned in 30 years at any price for any purpos. I RECOMEND !!!! Thanks Sonic for a good price and a good product.

By wwearlyjr on July 4, 2009

13 found this helpful




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