Variants
A single 13" that delivers extreme, hard‑hitting bass with surprisingly good sound quality and a very robust build. Best suited to ported enclosures and rigs with stout amplification and electrical support.
Buyer confidence
89%Highlights
- 1 Year Warranty
- Injection molded foam surround with VAST™
- Dual Nomex progressive spiders with stitched tinsel leads
- Diecast aluminum frame with integrated heat sink fins
Key specs
Full specs- Power Handling (Watts RMS)
- 2000 Watts RMS 4000 Watts Max
- Subwoofer Type
- Standard
- Voice Coil Type
- Single Voice Coil
- Size
- 13"
- Le (mH)
- 0.53
- Qms
- 2.93
- Qts
- 0.34
- Vas (Liters)
- 69.3
Key specs
Full specs- Power Handling (Watts RMS)
- 2000 Watts RMS 4000 Watts Max
- Subwoofer Type
- Standard
- Voice Coil Type
- Single Voice Coil
- Size
- 13"
Highlights
Overview- 1 Year Warranty
- Injection molded foam surround with VAST™
- Dual Nomex progressive spiders with stitched tinsel leads
Review highlights
Based on customer reviewsRockford Fosgate Power 13" T2 Single 1-Ohm Subwoofer — brutal SPL, deep low end
A single 13" that delivers extreme, hard‑hitting bass with surprisingly good sound quality and a very robust build. Best suited to ported enclosures and rigs with stout amplification and electrical support.
What buyers praise
- Very high SPL for a single 13" — extremely loud and impactful
- Deep, low-frequency extension (reports of tight, mind‑blowing lows)
What to watch for
- Performs best in a properly built ported enclosure (users tuned boxes around ~30–33 Hz)
Overview
The Rockford Fosgate Power T2S1-13 is a high-performance 13-inch subwoofer with 13" effective radiating cone area and a single 1‑ohm voice coil for simpler low-impedance wiring.
Best for
- Car audio systems needing a large radiating area for deep bass
- Setups where a single 1‑ohm voice coil simplifies amplifier wiring
- Applications that demand high cone excursion and thermal management
Key points
- 13 inches of effective radiating cone area
- Single 1‑ohm voice coil for ease of low-impedance wiring
- Dual spiders to support extended cone travel
- Inductive Damping Heat Sink (IDHS) for improved thermal performance
- Klippel-verified for measured performance
- Technologies include VAST surround, FlexFit basket, stitched tinsel leads, and an anodized aluminum voice coil former
Fit and use
Intended as a vehicle subwoofer. Match the subwoofer to an amplifier that supports a 1‑ohm load and to an enclosure designed for a 13" effective radiating area. The dual-spider design supports higher excursion; the IDHS and construction features aid thermal and mechanical reliability during demanding use.
What to know
Confirm amplifier compatibility with a single 1‑ohm voice coil and verify enclosure recommendations and power-handling specifications from official product data before purchase. The subwoofer builds on Rockford Fosgate’s Power T2 family design goals and includes multiple engineering features to improve excursion and t…
Key features
- 1 Year Warranty
- Injection molded foam surround with VAST™
- Dual Nomex progressive spiders with stitched tinsel leads
- Diecast aluminum frame with integrated heat sink fins
- Detachable die cast aluminum trim ring
- Vented pole piece
- Integrated aluminum heat sinking shorting ring (IDHS)
- Aluminum dustcap
- Proprietary surround mechanical clamping ring
- Custom push spring insulated 8 AWG terminals
- Single layer edge wound aluminum 4" voice coil
- Triple stack segmented ferrite motor structure
More info
Manufacturer details
The Power T2S1-13 subwoofer features 13-inches of effective radiating cone area and a single 1-ohm voice coil for ease of wiring.
Additional details
This subwoofer is not just another made with off-the-shelf parts, we wanted something better, and we knew our fanatics demand this as well. Since the original Power T2 subwoofer was designed by one of the leading loudspeaker engineers in the world, there were some lofty goals that had to be reached. Work was done from the ground-up to out-perform it's previous family members, while incorporating valuable feedback from our great network of Rockford Fosgate dealers. They wanted it bigger and badder with dual everything, and we feel that goal was crushed.
Why 13-inches? Well, this is a combination of the cone and surround assembly described as the "total effective radiating area". Since this model is so massive, we incorporated dual spiders for exceptional travel of the cone assembly. The motor structure operates very linear for exceptional sonic quality and the IDHS heat-sink gives the subwoofer impressive power handling capacity. Top it off with proprietary input terminals for large gauge cables to efficiently deliver the needed voltage, and this subwoofer is ready to drop the doom!
WARNING: Use caution when installing this subwoofer. It's heavier than Atlas holding a globe on his shoulders.
Technologies

FlexFit Basket - Subwoofer
The slot mounted frame pattern of the FlexFit basket utilizes slots (where feasible) instead of single screw sized

CEA-2031
Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards. This means your speaker has
Stitched Tinsel Leads
Multipoint "periodic" stitched lead wire technique reduces the mass of each tinsel lead and spreads stress and

Inductive Damping Heat Sink
Secures directly to the top of magnet structure to improve system efficiency by reducing both distortion and back

Klippel Verified
To adorn the ‘Verified with Klippel’ mark, the qualifying company’s loudspeaker engineering personnel must be
Anodized Aluminum Voice Coil Former
Two things generally happen when voice coils heat-up. They can generate heat close to the melt-down temp of their

VAST Surround - Subs
Rockford Fosgate's proprietary surround technique, VAST, provides up to a 25% increase in the speakers effective
Specs
Specifications
| Power Handling (Watts RMS) | 2000 Watts RMS 4000 Watts Max |
| Subwoofer Type | Standard |
| Voice Coil Type | Single Voice Coil |
| Size | 13" |
| Le (mH) | 0.53 |
| Qms | 2.93 |
| Qts | 0.34 |
| Vas (Liters) | 69.3 |
| Qes | 0.39 |
| Re (Ohms) | 0.9 |
| Fs (Hz) | 25 |
| Nominal Impedance | 1-Ohm |
| Speaker Connector | 8 AWG slot loaded |
| Nominal Impedance | 1-Ohm |
| Speaker Connector | 8 AWG slot loaded |
| Mounting Depth | 9.70 in. (246 mm) |
| SPL (dB @ 2.8v/1m) | 90 |
| Sealed Box Volume (Vb) | 1.85 cu. ft. (52.3 Liters) |
| Magnet Weight (oz) | 528 oz. (14.97 Kg) |
| Sd (cm2) | 707 |
| Xmax (mm) | 34 |
| Woofer Displacement | 0.250 cu. ft. (7.08 Liters) |
| Cutout Diameter | 12.28 in. (312 mm) |
| SPL (dB @ 1w/1m) | 87 |
| Shipping Weight | 93.70 Lbs. (42.5 Kg.) |
| Vented Box Volume (Vb) | 4.0 cu. ft. (113 Liters) |
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Installation resources
Wiring diagrams
Box Advisor

Sealed Enclosure
- Recommended volume
- 1.85 cu ft
- Volume range
- 1 cu ft to 2 cu ft
- Dimensions
- 20 in W x 16 in H x 14.5 in D
- F3
- 55.5 Hz
- Qtc
- 0.54
- Port / ID
- 4 in
- Subwoofer size
- 4 in
- Impedance
- 8 ohm
- Power handling (RMS)
- 2000 W

Vented Enclosure
- Recommended volume
- 4 cu ft
- Volume range
- 3.5 cu ft to 4.5 cu ft
- Dimensions
- 38 in W x 16 in H x 16 in D
- F3
- 32 Hz
- Tuning (Fb)
- 38 Hz
- Port / ID
- 4 in
- Subwoofer size
- 4 in
- Impedance
- 8 ohm
- Power handling (RMS)
- 2000 W
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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