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Rockford Fosgate T0D415
Power T0 15" subwoofer with selectable 2- or 8-ohm impedance
Our take on the Rockford Fosgate T0D415 by Crutchfield's Jo Greene
Rockford Fosgate engineered Power Series subs for ultimate high-power, high-volume bass. So whether you're building a system for serious competition or just to satisfy your appetite for great bass, these subs deliver colossal low-frequency reproduction that's as real as it gets.
Crowd-drawing bass beats
The Power Series T0D415 15" subwoofer features a responsive paper cone that's reinforced with the same Kevlar® fibers used in bulletproof vests — a hard anodized aluminum dust cap covers and protects the entire cone, showcasing the glossy Rockford Fosgate logo. The result? You get classic warm bass from a cone that's virtually indestructible. Rockford Fosgate uses a new technique to attach the oversized rubber surround to the cone that increases available cone area up to 25%, so this sub can push more air for even bigger bass.
Extended excursion for more bass
This T0 sub is housed in a hefty cast aluminum frame that provides a stable platform for extreme cone excursion, while an extended pole piece and bumped backplate allow the sub to hit deeper lows without "bottoming out." Special venting in the frame keeps the aluminum voice coils cool through heavy use for consistent bass performance over time.
Fuse-protected impedance selection
Rockford Fosgate outfits Power Series subs with their unique SWIFT™ terminals, which lets you build exactly the system you want — high-power or multi-sub — without complicated wiring. Just rotate the impedance selection jumper to safely choose between 2 or 8 ohms. The jumper is also fused to protect your sub from accidental overload. If you're thinking about adding another sub down the line, this sub simplifies reconfiguring your system. These subs work equally well in a sealed or ported enclosure, so you can choose the kind of bass you want for your system.
To drive this single subwoofer, we recommend a mono amplifier rated between 600 and 1200 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.
What's in the Box:
- One 15" Dual 4-ohm voice coil subwoofer
- Fused 2-ohm/8-ohm SWIFT jumper (installed)
- Twelve 1-5/8" Allen head screws
- 4mm Allen head bit
- Installation/Operation manual (English/ French/ Spanish/ German)
- 15" subwoofer with with selectable 2- or 8-ohm impedance
- Kevlar® reinforced paper cone with aluminum dust cap
- Santoprene surround
- cast aluminum basket
- metal grille included
- power range: 150-800 watts RMS (1600 watts peak power)
- frequency response: 25-500 Hz
- sensitivity: 86.5 dB
- top-mount depth: 8-3/8"
- sealed box volume: 2.25 cubic feet
- ported box volume: 2.12-4.22 cubic feet
- warranty: 1 year
- Our 60-day money-back guarantee
Features and Specs
|Impedance||2 ohms or 8 ohms|
|Cone Material||Kevlar reinforced paper|
|Ideal Sealed Box Volume (cubic feet)||2.25|
|Ideal Ported Box Volume (cubic feet)||2.66|
|Port diameter (inches)||4|
|Port length (inches)||10|
|Dual Voice Coil||Yes|
86.5 dB at 1 watt
|Frequency Response||25 - 500 Hz|
|RMS Power Range (Watts)||150-800|
|Peak Power Handling (Watts)||1600|
|Top Mount Depth (inches)||8 3/8|
|Bottom Mount Depth (inches)||8 7/8|
|Cutout Diameter or Length (inches)||13 7/8|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Dual 4-ohm Voice Coils: The Rockford Fosgate T0D415 subwoofer features dual 4-ohm voice coils and a jumper to easily wire them in series or parallel; the voice coils cannot be easily wired separately.
SWIFT Terminal: Rockford's proprietary SWIFT Terminal (Selectable Woofer Impedance Fused Termination) offers a simple and convenient method of selecting the impedance presented by the dual voice coil subwoofer. The impedance jumper also provides fused protection from severe overload conditions. With the jumper in the 2-ohm position the voice coils are wired in parallel; with the jumper in the 8-ohm position the voice coils are wired in series.
Woofer: The Kevlar fiber reinforced paper cone has a hard anodized aluminum dust cap of equivalent size; the result is a lightweight and extremely strong cone, reducing piston flex and cone distortion.
VAST Surround: The Vertical Attach Surround Technique (VAST) increases a speaker's effective radiating cone area without increasing the size of the basket. The surround is made of durable Santoprene.
Voice Coil Former: Aluminum voice coil formers offer superior heat dissipation over other commonly used materials. The hard-anodized finish increases the former strength. These two factors combine to improve the overall power handling characteristics of the subwoofer.
Cast Aluminum Basket: The basket is a die-cast aluminum design to add rigidity and eliminate multiple acoustic resonances. Additionally, the large aluminum mass helps reduce voice coil former temperature and increase power handling.
Motor Assembly: The double stacked magnet assembly, extended pole, and bumped back plate are used to create a powerful linear motor with increased excursion capability for superior bass output.
Terminals: The proprietary spring terminals will accept bare wire up to 8-gauge.
Grille: A metal grille is included to protect the subwoofer and add a finished look. If the sub is bottom mounted and the back is visible, the grille can be disassembled and just the trim ring can be installed to cover the mounting screws.
CEA-2031 Compliant: Power handling on the T0D415 subwoofer conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle its rated power under continuous demand, not just for an instant.
FlexFit Basket: The Flex Fit frame utilizes slots (where possible) instead of single screw sized holes; allowing slight adjustment of the speaker when mounted.
Ported Box: Two ported enclosures are recommend:
- Optimum: internal volume of 2.66 cubic feet using one 4" diameter x 10" long port; this yields a tuning frequency of 32 Hz
- High Output: internal volume of 4.22 cubic feet using a 3" x 16-1/2" x 22-1/2" slot loaded port; this yields a tuning frequency of 38 Hz
Sealed Box: When using a sealed enclosure, Rockford recommends an internal volume of 2.25 cubic feet. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.
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 verify what’s in the box, 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.