Infinity/JBL 4 Speaker Full System SKU: Infinity-4J



Free System Design Call Now 1(888)311-0016

Infinity Kappa Speakers

Our absolute favorite speaker system for bolt in and smile results. This speaker system is the nicest sounding setup right out of the box that we have ever encountered. The speakers can be added to a Harley without complex tuning. You simply get an instant jump in output and sound quality by installing them. 

A Powerful Waterproof Amplifier That Is Easy to Install

Designed specifically for Harley applications, the JBL PA1254 amplifier is well suited for extreme sound quality in demanding conditions. Easy setup with built in crossovers and a very friendly balanced signal input stage, the PA1254 is all about perfect form and function. This is one of the friendliest amplifiers to install and set up for any Harley application. Pair the optional plug and play wire harness kit for a super smooth and quick installation.

Future Upgradeable

Although these speakers work spectacularly well without a sound processor, they are even better with one. So if you want another great performance boost down the road, you can always add a sound processor (DSP) to get another huge boost in sound quality. The Infinity Kappa speakers are capable of hanging with some of the most expensive sound quality speakers on the market. 

The best DSP to add to this system can be found here.

Look No Farther

If you are looking for a guaranteed high performance result and no fuss installation, this is the system you want. 

Product Description

Radio Flash Required

We offer a free loaner flash tool as well as free tech support. We have a special radio flash procedure specifically for a factory radio, and this  amplifier with these speakers, so be sure to ask for instructions.

Free Radio Flash Loaner Tool


Flash Your Bike Yourself and Be Sure That the Job Is Done Right

Our flash tool rental kit ships with all of the parts required to flash any Harley touring bike radio from 2014 - current year. The kit ships with a return shipping label for your convenience. After you are finished with the tool simply drop it in the mail and receive a full refund for your $200 deposit.

$120.00 Value! 

Read all of the details here


  • 1998 through 2013 Street Glide, Road Glide, Electra Glide. Fairing speaker adapters required that can be found here.
  • 2014 to current year Street Glide, Road Glide, Electra Glide - Drop in fit.
  • 2014+ Ultra Limited - This kit adds lid speakers and does not include replacement speakers or connections for the tour pack speakers. We do offer those additional parts and options. Call for more information 1(888)311-0016


  • 1 Year JBL
  • 3 Year Infinity


Water Proof

Very High Level Performance

Road Glide

Street Glide

  • Made for Harley
  • Waterproof
  • Drop-in Fitment


JBL PA1254 Amplifier

  • Max Power 1250W peak
  • RMS Power Output @ 2Ω (full-range)
  • 125W x 4, <1% THD+N
  • RMS Power Output @ 4Ω (full-range)
  • 75W x 4, <1% THD+N
  • RMS Power Output @ 4Ω Bridged (full-range)
  • 250W x 2, <1% THD+N
  • Front selectable hi-pass filter
  • off, 60-, 80-, 120Hz @ 12dB/octave
  • Rear slectable all-/hi-/lo-pass filter
  • 60-, 80-, 120Hz @ 12dB/octave
  • Frequency Response
  • 20Hz – 20kHz
  • Signal-to-Noise Ratio (full-range)
  • >75dB (ref 1W output @ 4Ω)
  • Fuse rating
  • 40A

Kappa Perfect 600X

  • Power handling: 75Wrms, 225W peak
  • Sensitivity (@ 2.83V): 93dB
  • Frequency Response: 60Hz - 20kHz
  • Impedance: 3.0 ohms

Kappa Perfect 900X

  • Power handling: 75Wrms, 225W peak
  • Sensitivity (@ 2.83V): 93dB
  • Frequency Response: 60Hz - 20kHz
  • Impedance: 3.0 ohms

What's Included

Video: Optional "Make Life Easy Package"

  • 1 JBL 1,250 Watt 4 Channel Waterproof Amplifier
  • 1 Pair Infinity Kappa 600X Fairing Speakers
  • 1 Pair Infinity Kappa 900X Lid Speakers

What's Not Included

  • Optional Radio Flash Tool
  • Optional Plug & Play Wire Harnesses 
  • Optional Lid Speaker Cut-In Kit