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Hifonics XX-3215

15" Goliath Subwoofer

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The product on this page is discontinued.
  • 15" Competition Goliath SPL Subwoofer
  • Power Handling:
    • RMS: 3200 watts
    • Peak: 6400 watts
  • 4" CCAW voice coil with bi-flair winding
  • Black Aluminum voice coil
  • 2 Ohm Impedance
  • Dual voice coil configuration
  • Dual nickel plated push terminals
  • Chrome aluminum die cast basket
  • Triple Stacked 300 oz. motor structure with chrome vented wrap
  • Woven carbon fiber and silver thread glass fiber cone
  • 1.5" large polyester foam edge
  • Dual layer conex spider with woven tinsel leads
  • Embossed black anodized aluminum dust cap with silk screen
  • Large bumped T-Yoke chromed back plate
  • 1-year SonicElectronix.com warranty
Subwoofer Specifications
Subwoofer Size15"
Peak Power Handling6400 watts
RMS Power Handling3200 watts
Voice Coil(s)Dual
Impedance (Per Voice Coil)2 ohms
Frequency ResponseN/A
Sensitivity100.5 dB
Xmax (millimeters)25 mm
Woofer CompositionCarbon & Glass Fiber
Woofer SurroundFoam
Warranty and Return Policy
Return Policy Standard Return Policy
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Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
 ProductPriceAdd?
24.6 ft. of 10 AWG Monster Cable 400 Series Speaker Wire24.6 ft. of 10 AWG Monster Cable 400 Series Speaker Wire
For the ultimate connection, Monster uses a MultiTwist™ construction, a Magnetic Flux Tube, and even more cutting edge wire technology.		$50.00
15 ft. of 12 AWG StreetWires Speaker Wire15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.		$19.99
20 ft. of 12 AWG Kicker Speaker Wire20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation.		$24.99
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
 ProductPriceAdd?
Dynamat Rubber RollerDynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!		$18.99
Dynamat Extreme Bulk PackDynamat Extreme Bulk Pack
36 ft. Dynamat Xtreme Bulk Pack enhances the sound for your entire car!		$149.99
Bass Reconstruction Processors
These sound processors are perfect for enhancing the lower frequencies of a car audio system. After some installation and tuning, your new system will sound better than ever!
 ProductPriceAdd?
The Epicenter by AudioControl (Gray)The Epicenter by AudioControl (Gray)
The original bass booster expander with included remote will enhance the bass of your new system.		$149.99
Maxxsonics MX-3Maxxsonics MX-3
Enhances the bass response, increases linearity, buffers unwanted noise, and improves the frequency range of your subwoofer.		$59.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
 ProductPriceAdd?
20 oz. Bag of Poly-Fil20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.		$5.99
16 oz. Can of Adhesive Spray16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.		$5.99
Spring Post Terminal CupSpring Post Terminal Cup
Makes adding a spring post terminal to an enclosure simple! Banana clip ready!		$2.99
Binding Post Terminal CupBinding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.		$2.99
Banana Clip TerminalsBanana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.		$4.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
 ProductPriceAdd?
AutoSound 2000 CD-101AutoSound 2000 CD-101
Low frequency test CD		$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.		$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.		$12.99

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: Hifonics
Model number: XX-3215
Weight: 68.00 lbs
Internal SKU: xx3215
Internal product ID: 7809

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Really great experience shopping at sonic Electronix... They've been helping me to find a great deal & right amp for my system! You got yourself a buyer here!! Each time i need to improve my system i will definitely buy from Sonic Electronix!! THANK YOU SO MUCH FOR HELPING ME OUT!!

- Ceferino from New Mexico

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