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Boston Acoustics G512-4

12" 4-ohm subwoofer

Item # 065G5124

But most importantly, the G512-4 12" subwoofer will really pound out the bass.

But most importantly, the G512-4 12" subwoofer will really pound out the bass.

Discontinued item

Item # 065G5124

About the Boston Acoustics G512-4

Big bass that's easy to replace

But most importantly, the G512-4 12" subwoofer will really pound out the bass. The woofer's thick foam surround allows three inches of cone excursion, so it'll move lots of air — that means lots of deep bass. Boston's innovative RadialVent® system uses that same woofer cone motion to expel hot air that can damage the sub. Combine that with heavy-duty internal parts, and this sub will hang tough when you turn up the volume.

Big bass that's easy to replace

Soft Part System Boston's G5 subs combine high performance and outstanding sound quality in a woofer with some unique features. Bass competitors, check out Boston's pioneering Soft Part System (SPS™) — it lets you swap out the defective parts of a blown sub so your system is back in action a lot faster.


Extra protection, cool technology

SureSet terminals

The SureSet™ terminals come equipped with two fuses to help protect the voice coil during momentary overdrive, and allow you to change the woofer out quickly in case a fuse is blown. Also, G5 subs are compatible with Boston GTR TunableRadiators™ — a cool technology that can significantly boost the sound output of your G5 sub with no extra power or space required.


Advanced materials and engineering

But most importantly, the G512-4 12" subwoofer will really pound out the bass. The woofer's thick foam surround allows three inches of cone excursion, so it'll move lots of air — that means lots of deep bass. Boston's innovative RadialVent® system uses that same woofer cone motion to expel hot air that can damage the sub. Combine that with heavy-duty internal parts, and this sub will hang tough when you turn up the volume.

This subwoofer is optimized for small, sealed enclosures but also works in larger ported enclosures. Whatever type of box you choose, you can count on the high-end audio performance of a Boston Acoustics speaker.

Priced per speaker

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Product highlights:

  • 12" 4-ohm subwoofer
  • copolymer woofer cone with foam surround
  • RadialVent cooling for increased power handling
  • SPS™ (Soft Part System) allows quick field repairs
  • compatible with Boston's GTR TunableRadiators™
  • power range: 100-450 watts RMS
  • frequency response: 20-350 Hz
  • sensitivity: 90.6 dB
  • mounting depth: 7-3/8"
  • sealed box volume: 1.00 cu. ft.
  • ported box volume: 2.00 cu. ft.
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # G512-4

What's in the box:

  • 12" Woofer
  • 2.5mm Hex key
  • 8 M4 T-Nuts
  • 8 M4 lock washers
  • 8 M4 screws (length 1-1/2")
  • 8 M4 self-tapping screws (length 1-1/2")
  • Manual
  • Warranty sheet
  • Product Registration card

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More details on the Boston Acoustics G512-4

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Product Research

Features
Enclosure Recommendations

Features

Chassis: The Boston Acoustics G5 series high-performance subwoofers are built upon a rigid cast aluminum chassis. It features the patented RadialVent cooling technology which directs airflow around the 2-3/4-inch voice coil for increased power handling.

Materials: The G512-4 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.

SPS (Soft Part System): The woofer has a removable assembly which allows you to swap interchangeable parts to make a different configuration, or service the woofer in the field. A 2.5mm hex key is included for disassembly. Note: The replacement single voice coil SPS assembly for this woofer is SPS-G5124 (item # 065SPSG512). You can also use the SPS-G51244 assembly (item # 065SPSG524) to change the woofer into a dual voice coil configuration.

SureSet: The speaker terminals are equipped with two 7.5-amp ATC fuses providing voice coil protection under transient conditions such as accidental momentary overdrive. Use of the standard automotive style fuses allows you to quickly service the woofer in case a fuse is blown during usage. 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 3-inch peak-to-peak excursion for accurate deep bass output from a small sealed enclosure.

GTR TunableRadiators: The G512-4 is compatible with the Boston Acoustic GTR TunableRadiator (item # 065GTR12). These passive radiators, when mounted in an enclosure with the G5 woofer, can produce increased bass output without added enclosure volume. Note: The manual provides several enclosure shape examples for mounting a G5 woofer with a GTR TunableRadiator.

Enclosure Recommendations

Sealed Enclosure: The G512-4 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, 14" long port.

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