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Rockford Fosgate Power T115D4

15" Power Stage 1 Dual 4 ohm Subwoofer

Discontinued
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This item has been discontinued and
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This item has been discontinued

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t1d415 thumbnail

Rockford Fosgate Power T1D415

OUR PRICE: $699.99

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Rockford Fosgate Power T115D4

15" Power Stage 1 Dual 4 ohm Subwoofer

$269.99

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25 ft. of Streetwires 12 Gauge Speaker Cable

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$37.85

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20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

$53.99

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2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

$7.99

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  • 15" Power Stage 1 Series Subwoofer
  • Power Handling:
    • Peak: 1200 watts
    • RMS: 600 watts
  • Aluminum parabolic cone woofer
  • Thermoplastic rubber surround
  • Dual cast aluminum basket with spider venting
  • Dual 4-ohm voice coils
  • Double stacked magnet motor assembly
  • 1-year SonicElectronix.com warranty

Product History:

Rockford Fosgate T1D415 thumbnail
(newest, current model)
Rockford Fosgate T115D4 thumbnail
(previous model, replaced by Rockford Fosgate Power T1D415)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
15"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
1200 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
600 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
28 - 200 Hz
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
88 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
14 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Silver
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Aluminum
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Rubber
Magnet Structure
Defines the overall structure of the subwoofers magnet.
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.25 cubic feet
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.25 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.75 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.75 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
8-3/8"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
13-13/16"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 – 10.
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
57%
4 Star
29%
3 Star
14%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.1
Value
4.0
Features
4.4
Design
4.7
Usability
4.6
Gene

Enfield, ct

Overall
Durability
Value
Features
Design
Usability
Good sub

February 7, 2009

My buddy has one of these hooked up in his Cherokee and it sounds really good hits lows really good but I personally like 12's...my type x destroys his system...its a pricey sub..i would save a little more a buy the t2's if anything or the orion hcaa's those are intense...i think the type r 15 slams better than this sub and its cheaper..but i always like rockford products because they are durable..ive blown type r's and type s's before...but my p3 always stood up...the t1 is a good sub..

8 of 9 found this helpful

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ryan

wasilla, AK

Overall
Durability
Value
Features
Design
Usability
Good Sub!

September 9, 2008

Awesome second best sub(as far as the RF line goes). Seems to handle more more RMS power than it is rated at. Sounds really good and clean. Hits all the lows very well. Shakes the entire car with the right enclosure. Very impressed, would like to get a hold of a T2 after hearing this one. Kind of pricy though.

7 of 8 found this helpful

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Bonez :) Hiya Haterz!!! LMFAO

HELL-ena, MT lol

Overall
Durability
Value
Features
Design
Usability
Decent...could find better.

July 12, 2009

I've been installing/researching car audio for 15 years and Rockford has been a big part of my experiences. I had alot of expectations for this sub as was only semi-impressed. I've had two inverted in my SUV with a RF T-2000bd for power. Pretty sweet. But I wanted to be louder, of course, since I was a spl competitor. So I went to four in a ported box right behind the front seats in my SUV. Power was coming from two T-2000bd's this time. Let me tell you what...After fixing the shoddy and incorrect wiring job of one of my so called "friends", they didn't sound too bad. Was actually at times fairly loud. But NOT for the price you pay. NOT for the amount of wattage I had. Why, you ask? ENCLOSURE DESIGN. I would name names as to who built not one, but...three? four? HORRENDOUS boxes for me. They would probably have done much better with a different enclosure. However, as far as price vs. performance goes, they are blowing smoke up your ***. I've built louder systems with subs that cost less than half as much as the T1s or T2s. The key? Enclosure design. Research. Resonant frequency of your vehicle. Little bit of science...not grab the biggest most expensive thing you can find and put excessive amounts of power to it. I will admit, one of my ex-friends is doing well with a single T2 at comps right now. And it sounds decent. But I'm afraid of hinting to him that there are guys in other states running a single 10", let alone a 15" putting up BETTER numbers than him. Do your research and don't buy whats "FED" to you by monstrous car audio companies.

You guys at Sonic have some great prices. I'll prob be making a purchase in the near future.

Sorry for the long review but when I see a chance to express the truth I do it.

6 of 7 found this helpful

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Rum Runner

Ashtabula, OH

Overall
Durability
Value
Features
Design
Usability
Finally committed to a sub!

May 18, 2013

After many sizes, shapes, wattages, and brands of subs, I finally found a subwoofer that I can commit to. I have one in a 4 cubic ft, L ported Bass Rocker box. And wow does this slam. I was running it with an Alpine MRP-M500 and it's loud. Do not over power his sub, and give it room to breathe. I am picking up another one and will run 2 of them in a custom 8 cubic ft chambered and l ported box with a HiFonics 1000 watt 2 channel amp. I have this setup in a 2002 Mitsubishi Lancer OZ Rally.

5 of 6 found this helpful

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colton

Oklahoma

Overall
Durability
Value
Features
Design
Usability
awesome sub.. clean and loud

March 11, 2010

All the stores around here had this sub selling for 350-400 dollars. 270 dollars shipped on here, best deal i could find by far.

right now i got it hooked up to a 1000 watt Sony amp that i had sitting around. Its so clean! i was real impressed with how clean it sounds. the amp is crappy and under powering it, but i can imagine how good and loud it will sound when i get a better amp, cause it sounds pretty good with this one. looks pretty bad a** too.

only negative thing i could say about it is how easy it is to dent the aluminum cone. i have a tiny dent in mine already from who knows what, and no idea how it got there.

4 of 5 found this helpful

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tommylee

el paso, TX

Overall
Durability
Value
Features
Design
Usability
t1's

June 19, 2009

these are some awsome subs and i got them at a real good price. at the audio stores here they were trying to rip me off big time. but this is not for the weak at heart. slamming the beats hard and thats what you guys helped me do at an affordable price. keep up the good prices!!!!!!

4 of 5 found this helpful

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Michael

Jonesboro, AR

Overall
Durability
Value
Features
Design
Usability
The Package

September 15, 2006

This sub hit really hard its the little brother of the t2 buut not small in sound. U put this sub on at least 800 watts(100-600) and it will hit. I had one in a 190e benz hooked up to a pioneer face and a fosgate amp. Great deal on this site.

4 of 6 found this helpful

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Accessory Tools and Products

Accessories added

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $37.85

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $53.99

40 Square Feet of Sound Dampening Material

Thicker than the competition, complete sound damping kit for entire vehicle! Use for trunk, doors, roof and floor.

Your Price $97.99

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $64.99

Stinger Sound Dampening Bulk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for the whole car!

Your Price $94.97

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $87.63

Dynamat Sound Dampening Bulk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $159.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $18.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $74.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $8.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 Rockford Fosgate Power T115D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Rockford Fosgate Power T115D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Rockford Fosgate Power T115D4 Subwoofers

Mono Amp

4 Channel Amp

4 Rockford Fosgate Power T115D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
What size amp would I need to power 1 of these 15" speakers?
DeAndre P on Nov 10, 2015
Best Answer: Hello DeAndre,

The answer to your question is in the description and specs of the driver:

The T115D4 was a dual-4ohm driver, asking for 600 watts RMS. So your answer is, you seek an amplifier providing ~600w RMS @ 2ohms. For example, the Rockford Fosgate P1000X1bd.

http://www.sonicelectronix.com/item_67775_Rockford-Fosgate-Punch-P1000X1bd.html

Note, Amplifiers don't have a 'size' , and ratings an amplifier has on the box does NOT dictate if it is a suitable amplifier for your application.
Reply · Report · Rick MStaff on Nov 11, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

T115D4

UPC

780673151536

Weight

46.00lbs

Internal SKU

t115d4

Internal Product ID

7837

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate Power T115D4

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