Garage
Shop

See all parts that fit your 2021 FLRT Freewheeler

Hifonics B15D4

15" Dual 4 ohms Brutus Series Subwoofer

Hifonics
Shop all Hifonics
item photos coming soon
Product videos
highlight-star-icon

15" Dual 4 ohm Brutus Series Subwoofer • 1400W Max • 700W RMS • Polypropylene cone woofer • Stitched NBR (Nitrile-Butadiene Rubber) surround • 4-Layer high temperature 3" dual 4 ohm aluminum voice coil

Learn more about the b15d4

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

brz15d4 thumbnail

Hifonics BRZ15D4 (BRZ-15D4)

OUR PRICE: $89.99

View item

Loading...
MAS.652 main

Precision Power (PPI) MAS.652

150W RMS 6.5" MAS Series 2 Way Coaxial 2-ohm Motorcycle Speakers

-22.22%

$279.99

List price $359.99

RVM-35V1 main

MB Quart RVM-35V1

3.5" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-10.38%

$189.99

List price $211.99

RV.R1 main

DS18 RV.R1

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

RVDVD3.0 main

MB Quart RVDVD3.0

Multi-Zone DVD Receiver with Bluetooth for RV's

1
-10.10%

$257.99

List price $286.99

MB Quart RVM2.0

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

-10.29%

$156.99

List price $174.99

RVM-10V1 main

MB Quart RVM-10V1

10" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-9.09%

$250.00

List price $275.00

PRO-1.5KP10.4 main

DS18 PRO-1.5KP10.4 (Sold Individually)

3000W Peak (1500W RMS) 10" PANCADÃO Series 4-ohm Mid-bass Speaker

US2-C65A-175 main

SSV Works US2-C65A-175

120W Peak (60W RMS) Cage Mount Speaker Pods with 1.75" Clamp

US2-C65A-200 main

SSV Works US2-C65A-200

120W Peak (60W RMS) Cage Mount Speaker Pods with 2" Clamp

49ST9MR4 main

Kicker ST9MR4 (49ST9MR4)

1200W Peak (600W RMS) 9" Street Series Pro Midrange 4-ohm Speakers

-9.09%

$199.99

List price $219.99

Product Highlights


15" Dual 4 ohm Brutus Series Subwoofer • 1400W Max • 700W RMS • Polypropylene cone woofer • Stitched NBR (Nitrile-Butadiene Rubber) surround • 4-Layer high temperature 3" dual 4 ohm aluminum voice coil

Description


Hifonics brand icon

Authorized dealer

  • 15" Brutus Series Subwoofer
  • Power Handling:
    • Peak: 1400 watts
    • RMS: 700 watts
  • Impedance: Dual 4 ohm
  • Polypropylene cone woofer
  • Stitched NBR (Nitrile-Butadiene Rubber) surround
  • Integrated one-piece spider tinsel-lead design
  • Nickel-plated push terminals
  • For ported or sealed installations
  • Nomex spider material
  • Anti-resonance magnet boot
  • Nickel-plated ported back plate
  • 4-Layer high temperature 3" dual 4 ohm aluminum voice coil
  • 100oz. Double-stacked magnet structure
  • Sensitivity: 88 dB
  • 1-year SonicElectronix.com warranty

Product history:

Hifonics BRZ15D4 thumbnail
(newest, current model)
(previous model, replaced by Hifonics BRZ15D4 (BRZ-15D4))

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Hifonics B15D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Hifonics B15D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Hifonics B15D4 Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Hifonics B15D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


Best selling similar products

DB-SA305 D1 small

Deaf Bonce Apocalypse DB-SA305 D1

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 1 ohm
• Mount depth: 7.85"
• Sensitivity: 88.30 dB

(1)

$399.90

List price $399.90

DB-SA255 D2 small

Deaf Bonce Apocalypse DB-SA255 D2

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 7.4"
• Sensitivity: 87.50 dB

(1)

$259.90

List price $259.90

VCW152v3 small

NVX VCW152 Version 3 (VCW152v3)

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 8.19"
• Sensitivity: 88 dB (1W/1m)

(39)

$259.99

List price $311.99

YSW154 small

NVX YSW154

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 7.47"
• Sensitivity: 85 dB

(3)

$129.99

List price $167.99

ZV715D1 small

Sundown Audio Z-15 v.7 D1 15" (Z15V7D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 91.58 dB

$1364.99

List price $1559.99

XCW151 small

NVX XCW151

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Enhanced Woven Fiber Paper Composite Cone
• Custom High Roll Foam Surround
• 30 mm Xmax (One Way)
• Sensitivity: 87.3 dB

(1)

$599.99

List price $659.99

EXL-XX15.4DHE small

DS18 EXL-XX15.4DHE

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 4 ohm
• Paper Cone
• Foam Surround
• Mount depth: 8.86"
• Sensitivity: 88 dB

$599.95

List price $599.95

EXL-XX15.2DHE small

DS18 EXL-XX15.2DHE

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 8.86"
• Sensitivity: 88 dB

$599.95

List price $599.95

49L7X152 small

Kicker L7X152 (49L7X152)

• RMS Power: 1000 - 2000 watts
• Impedance: Dual 2 ohm
• Double-pressed pulp Cone
• UV-resistant Santoprene Surround
• Mount depth: 11-9/16"

(2)

$799.99

List price $899.99

SW-XV315D2 small

Sundown Audio X-15 v.3 D2 15" (X12V3D2)

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Mega Roll V2 Surround
• Mount depth: 11.6"
• Sensitivity: 85.9 dB

(1)

$749.99

List price $983.99

Specifications & Details


Subwoofer Specifications
Subwoofer Size
15"
Peak Power Handling
1400 watts
RMS Power Handling
700 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Sensitivity
88 dB
Xmax (millimeters)
15 mm
Woofer Composition
Polypropylene
Woofer Surround
Nitrile Butadiene Rubber NBR
Recommended Enclosure Specifications
Top-Mount Depth (Mounting Depth)
7.8"
Cutout Diameter
13.8"

Item Details


Manufacturer:

Model Number:

B15D4

Weight:

18.00lbs

Internal SKU:

b15d4

Internal Product ID:

12410

Product and How-to Videos


Customer Ratings & Reviews


Hifonics B15D4 thumbnail image

5 star
0%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
Sorry, no reviews found

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2009 Lexus LS600hL

1996 GMC K2500

2017 Ford Fusion

1978 Chevrolet Nova

1997 Ford F-250

2005 Buick Rainier

2015 GMC Canyon

2001 Kia Sephia

2015 BMW X5

2002 BMW Z3

Vehicle
Store
Delete

2021 Harley Davidson FLRT Freewheeler

2001 Harley Davidson FXSTB Night Train

1950 Harley Davidson EL

Vehicle
Store
Delete

2018 Can-Am Commander 1000 DPS

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.