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Rockford Fosgate RFB4122

Dual 12" Hatchback Subwoofer

Item # 575RFB4122

Question: What do you get when you add two Punch HE 12" subs to a heavy-duty Rockford Fosgate-built enclosure?...

Question: What do you get when you add two Punch HE 12" subs to a heavy-duty Rockford Fosgate-built enclosure?...

Discontinued item

Item # 575RFB4122

About the Rockford Fosgate RFB4122

Question: What do you get when you add two Punch HE 12" subs to a heavy-duty Rockford Fosgate-built enclosure? Answer: Bass that will change the way you hear music! The RFB4122 subwoofer features a sealed design for tight, extended low-frequency response.

Question: What do you get when you add two Punch HE 12" subs to a heavy-duty Rockford Fosgate-built enclosure? Answer: Bass that will change the way you hear music! The RFB4122 subwoofer features a sealed design for tight, extended low-frequency response.

The two Punch HE subs employ polypropylene cones housed in patented LXcursion steel baskets to deliver powerful impact. Install this stylish blaster in your vehicle, hook it up to an amplifier, and you'll experience new sonic power and force.

Details:
  • two Punch HE 12" subs
  • frequency response 30-400 Hz
  • power range 100-400 watts RMS
  • 8-ohm stereo or 4-ohm mono operation (specs are for 4-ohm mono operation)
  • sensitivity 88 dB
  • 34-1/4"W x 14-1/4"H x 14-11/16"D1 x 11-11/16"D2
  • 1-year warranty (woofers only)
READ LESS

What's in the box:

  • 1 Hatchback-style enclosure (depth tapers from top to bottom) with two 12" woofers (model RFP4812 - 8 Ohm) installed
  • Installation & Operation manual
MFR #RFB4122

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Crutchfield response

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More details on the Rockford Fosgate RFB4122

Pat M.

Features & specs

General
Woofer Size (inches) 12 x 2
Speakers Per Box ---
Woofer Material Polypropylene
Enclosure Type Sealed
Color Light gray
Pieces in System 1
Width (inches) 34-1/4
Height (inches) 14-1/4
Depth (inches) 14-11/16
Connector Type 5-way posts
Frequency Response 30-400 Hz
Power Range (Watts RMS) 400
Maximum Wattage 800
Sensitivity 88 dB
Impedance 8 ohms
Parts Warranty 1 Year (woofer only)
Labor Warranty 1 Year (woofer only)
The Rockford Fosgate RFB4122 replaces these items:

Product Research

Features
Dimensions
Warranty Note

Features

Woofers: This enclosure is loaded with two 8 ohm Rockford Fosgate Punch HE RFP4812 12" woofers and has a separate terminal cup for each woofer. When the terminal cups are wired in a stereo configuration, each channel of the connected amplifier will see an 8 ohm load. When the terminal cups are wired together in a parallel configuration and connected to a bridged amplifier, the amplifier will see a 4 ohm load. The power specs in the Crutchfield database are for 4-ohm mono operation. 

Small Sealed Enclosure: The design of the enclosure is a small acoustic suspension system, which offers great low frequency reproduction while occupying minimal space.

Angled Back Panel: The enclosure's back panel is angled, resulting in a greater depth at the bottom of the enclosure than at the top. The angled back reduces standing waves in the enclosure and allows the enclosure to fit nicely against the back of the angled rear seat of most cars.

Polypropylene Cones: Each woofer features a polypropylene cone, which provides the necessary combination of weight and strength that allows high levels of output without cone failure. The result is deep bass and very little distortion.

BART Foam Surrounds: Each BART surround has a large roll to assure maximum cone travel. By increasing cone travel, the BART surrounds allow the woofers to produce more bass.

Aluminum Voice Coil Formers: The voice coil formers are aluminum for highly efficient heat transfer. This allows the use of multiple layers of high temperature copper windings for improved efficiency, and it improves power handling by effectively dissipating heat away from the voice coil windings.

LXcursion Stamped Baskets: The Punch woofers use a durable and lightweight stamped cold rolled steel basket. To help prevent the spider from hitting the bottom of the basket ("soft bottoming"), the LXcursion basket features a deep step that moves the physical boundaries of the basket further away from the spider; this allows the cone far greater travel and, therefore more bass, without soft bottoming.

Hyper-Extended Pole Pieces: Each pole piece is extended in length to lower distortion and provide better low frequency response by operating the voice coil in a linear fashion throughout its travel in the magnetic field.

Vented Bumped Back Plates: Each back plate has been bumped to allow the woofer more room for excursion without bottoming out. Additionally, the back plate is vented to circulate cool air around the voice coil. By keeping the voice coil cooler, power handling is improved.

Consealer Gaskets: A newly designed front gasket conceals mounting screws and provides an airtight seal between the woofer frame and the mounting surface. A better seal increases the amount of bass due to the elimination of air leaks.

5-way Binding Posts: The binding posts will accept pin connectors, spade connectors, banana plugs, dual banana plugs, and bare wire.

Dimensions

Dimensions:

  • Overall Dimensions: W=34.25", H=14.25", D1=14.6875", D2=11.6875"
    • Depth Note: The depth measurements include the distance that the woofers protrude from the enclosure. The enclosure by itself has the following depth measurements: D1=14.125", D2=11.125"

Warranty Note

Warranty Note: The warranty only applies to the speaker, not the enclosure.

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