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Rockford Fosgate Power HX2 RFR3115

15" 2-ohm Dual Voice Coil Component Subwoofer

1 Review

Item # 575RFR3115

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Our take on the Rockford Fosgate Power HX2 RFR3115

Welcome to the Main Event! Rockford Fosgate's biggest and baddest subwoofer teems with so much power that its competitors will be lucky to merit a spot on the undercard. In fact, the 18-3/4 pound magnet structure in the RFR3115 alone is heftier than many other subs. And what a wallop this 15" bass slugger packs!

Welcome to the Main Event! Rockford Fosgate's biggest and baddest subwoofer teems with so much power that its competitors will be lucky to merit a spot on the undercard. In fact, the 18-3/4 pound magnet structure in the RFR3115 alone is heftier than many other subs. And what a wallop this 15" bass slugger packs!

Its FIBERlock treated paper cone handles an awesome 1,000 watts RMS for incredible competition-level thump. For championship-quality strength, the cone is bathed in a special "high solids" solution that ensures it can support the weight of a heavyweight prizefighter! The 2-ohm dual voice coil structure is designed to maximize amplifier performance and provide more system hook-up options. The coils themselves contribute to this woofer's brute force — they are more than 2 inches long, enabling the cone to travel 50 percent further than in Punch HX2 series subwoofers.

The vented plate helps the sub handle temperatures of more than 400 degrees without distortion, while the Santoprene rubber surround withstands all types of adverse weather. In all, it's an amazing blend of sound quality and unadulterated power.

Note: If you are wiring this DVC sub for lower impedance, make sure that your amp is compatible. Most car amplifiers are stable down to 2 ohms in standard mode, or 4 ohms in bridged operation.

  • FIBERlock treated paper cone with Santoprene™ rubber surround
  • frequency response 22-400 Hz
  • power range 150-1,000 watts RMS (500 watts per coil)
  • peak power 2,000 watts
  • sensitivity 87.5 dB SPL
  • dual voice coil design (two 2-ohm coils)
  • top mount depth 7-15/16"
  • sealed box volume 1.25 cubic feet
  • ported box volume 2.0-4.0 cubic feet
  • Recommended Q-Logic Box Type: 1, 2
  • 1-year warranty

What's in the Box:

  • One 15" woofer
  • ConCealer rubber gasket
  • "Team RF" sticker
  • Installation & Operation manual

Rockford Fosgate Power HX2 RFR3115 Reviews

Average Customer Review(s):

(1 Review)

Rockford Fosgate Power HX2 RFR3115

veltmanaudio from Viriginia Beach, VA on 5/20/2011

My opinion, these are the best subs Rockford Fosgate has made date (5/20/11! Today's T2's are nice, they may even be louder than the Rockford Fosgate Power HX2 RFR3115's, but the Rockford Fosgate Power HX2 RFR3115 produces a better sounding bass. I currently have two of the Rockford Fosgate Power HX2 RFR3115 and almost wasted my money by getting some of the Rockford Fosgate Power T2 15's. Don't get me wrong the T2's are worth getting, but not worth replacing the Rockford Fosgate Power HX2 RFR3115's.




Hands-on research

Product Research



Dual Voice Coils: For increased system flexibility, the woofer has two 4" 2 ohm voice coils. When the voice coils are wired in parallel with each other, the woofer presents a 1 ohm mono load. When the voice coils are wired in series with each other, the woofer presents a 4 ohm mono load. In addition, each coil may be connected to a different amplifier channel and each channel will see a 2 ohm load.

FIBERLock Cone: This new high performance paper stock is a combination of natural and regenerated cellulose fibers interlaced with a third, longer fiber. The three natural fibers are chemically fused together with a blend of three interactive binding agents. The extremely high fibril strength and toughness comes from the combination of all six of these component layers. FIBERLock is light, tough and it's proven to have superior sound quality and incredible durability. The cone is then treated with a Thermally Cured Acrylic Emulsion that seals the cone body for exceptional damping and even greater rigidity, resulting in industrial strength power handling.

BART Santoprene Rubber Surround: The BART surround has a large roll to assure maximum cone travel. By increasing cone travel, the BART surround allows the woofer to produce more bass. Santoprene is a durable and temperature tolerant rubber material that provides the consistent support needed for linear speaker cone motion. In addition, the damping capabilities of santoprene eliminate the transmission of sonic disturbances between the cone and the frame of the speaker, improving the accuracy of the woofer's low frequency response.

Punch LX Cast Basket: The woofer uses a cast aluminum frame that reduces frame flex and offers increased stability over a stamped steel frame. This frame offers the lowest coloration of sound due to the added strength. To help prevent the spider from hitting the bottom of the basket ("soft bottoming"), the LX Cast 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.

Aluminum Formers: The aluminum formers allow the voice coils to efficiently dissipate heat, resulting in improved power handling.

Dual Laminated Progressive Flat Spider: The dual laminated progressive flat spider provides a very strong suspension for the woofer. A secondary spider is fused to the primary spider near the critical voice coil bonding point. The combination of the two spiders, in addition to the progressive rolls in the spiders, provides the ultimate in linear control for high excursion capability.

Hyper-Extended Pole Piece: The 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.

Punch LX Long Xmax Voice Coils: The L-xtended winding coils allow the voice coil to stay in the magnetic gap longer, resulting in less distortion and more control. Combine the L-xtended coil with the hyper-extended pole piece and the result is a huge magnetic sweet spot and deeper, louder, cleaner bass.

Vented Bumped Back Plate: The back plate has been bumped to allow the woofer more room for excursion without bottoming out. Additionally, "Aerovent" cooling efficiently and quietly circulates cool air around the voice coil using a back plate that is vented with a radiused aerodynamic back vent. By keeping the voice coil cooler, power handling is improved.

Rubber Magnet Boot: A black rubber boot covers the exposed edge of the magnet structure to improve the cosmetics of the woofer and protect the magnet during installation. The rubber boot looks great when the woofer is mounted in an enclosure with a window that allows you to see the back of the woofer.

CONsealer Gasket: 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.

Binding Posts: The woofer has two sets of 5-way platinum binding posts, one set for each voice coil. The binding posts will accept banana plugs, dual banana plugs, spade connectors, pin connectors and bare wire.

Enclosure Compatibility: This woofer can provide extended bass in sealed and ported enclosures (see the "Specifications" section for more information on enclosures).


Recommended Sealed Box Volume: Rockford Fosgate recommends a 1.25 cu/ft sealed enclosure.

Recommended Ported Box Volume: The ported box volume range recommended by Rockford Fosgate is 2.0 cu/ft to 4.0 cu/ft. Within this range, the ideal size recommended by Rockford Fosgate is 2.5 cu/ft, so this is the enclosure recommended by Crutchfield. One 4" diameter x 8" long port, tuned at 35Hz, should be used with a 2.5 cu/ft enclosure.

Power Handling: The woofer has two 2 ohm voice coils, and each coil can handle up to 500 watts RMS (1000 watts peak).

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