High-Power Horn Speaker and Amplifier System for 2014+ Ultra or Tri-Glide Bikes SKU: Velocity-Ultra4RZH-1000.4

Regular price $1,729.99 $1,589


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The Velocity 4 Speaker & Amplifier Coax Horn Harley Upgrade

 A high-power audio system designed specifically for Harley Davidson motorcycles. This upgrade delivers exceptional sound quality with its 1,100 Watt 4 Channel amplifier and coaxial horn speakers. With extreme hard-hitting mid-bass and ultra-smooth extended high-frequency range, the Velocity 4 speaker system delivers true pro audio grade performance.

Installation Is Easy With the Bolt-in Design

The kit fits all Harley models from 2014 to the current year as well as 1998 through 2013 Street Glide, Electra Glide, and Ultra models. The included speakers are the best of both worlds, providing ultra-high output and a smooth frequency response. The low-profile horn fits under standard speaker grills, and the full chassis heat sink design amplifier can be mounted in any position.

Simple Yet Powerfull

The Velocity 4 Speaker & Amplifier Coax Horn Harley Upgrade is a simple yet powerful upgrade that will enhance your Harley Davidson's sound system without complex tuning. It also comes with a standard 2-Year Warranty, with an optional 3-Year Warranty available for added peace of mind.

Upgrade your Harley Davidson's sound system with the Velocity 4 Speaker & Amplifier Coax Horn kit today, and experience true pro audio performance on the road.

Video: Optional "Make Life Easy Package"

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Product Description

Detailed DSP Settings

These speakers sound great right out of the box, but if you do have a DSP, you are in luck because very detailed DSP settings are included for all of the speakers in this kit. We can even pre-program your DSP for you if you purchase one from us.This includes the DSR1, Musway M4+, or the Velocity 8 DSP.

You can find the full speaker maunuals with DSP settings here:  Velocity RZ65H User Manual & Velocity R65 User Manual

  • Very High Power Upgrade With a Simple Bolt-in Installation (sharknose fairing requires heatgun mod to speaker pods in fairing)
  • Great Sounding Without Complex Tuning
  • Standard 2-Year Warranty - 3-Year Warranty Available
  • True Pro Audio Design and Performance
  • Much Better Sounding High Frequency Than Other Horns
  • Extreme Hard-Hitting Mid-Bass
  • Ultra Smooth Extended High-Frequency Range
  • Light Weight and Doesn’t Hog up Your Bag Space


  • Will not fit 1998 through 2013 Road Glide, Street Glide, Ultra
  • Plug & Play option not available for 2013 and earlier bikes
  • Fits 2014-Up Batwing Ultra, Ultra Limited and Tri-Glide 
  • 2015-Up Sharknose fairing will require heatgun to modify the fairing speaker pod slightly for speaker fitment
  • Not yet tested for 2023 and later CVO models


  • 2 Year Limited
  • 3 Year Limited when installed by an authorized Velocity Speaker Design Direct Dealer


Water Resistant

Extreme Level Performance

  • 1,100 Watt 4 Channel Amplifier Included
  • Full Chassis Heat Sink Design Amplifier Can Be Mounted in Any Position
  • Made Specifically for Harley Applications
  • Onboard Active 12DB Crossovers
  • Fits All Years and Models of Harley Baggers From 1998 Through the Current Year
  • Speakers Are the Best of Both Worlds With Both Ultra-High Output as Well as a Smooth Frequency Response
  • Low Profile Horn Fits Under Standard Speaker Grills

Plug & Play Option

The plug and play option gives you:


Velocity RZA1000.4 Amplifier

  • 1,350 Watts Peak Power
  • 4 x 275 Watts @ 2 Ohm RMS
  • 4 x 150 Watts @ 4 Ohm RMS
  • 2 x 550 Watts @ 4 Ohm Bridged RMS
  • Crossover High/Low Pass 40hz - 400hz @ 12db
  • Signal Input Range .41V - 10V Balanced High & Low Level
  • RCA Input - Yes
  • Speaker Level Input - Yes (over RCA connection)
  • Efficiency 87% @ Full Power
  • Remote Trigger 12V or Signal Sense
  • Fuse Size 60A
  • Power Cable 8 Gauge

Velocity RZ65H Coax Horn 6.5" Speakers

  • Sensitivity: 101db 1W/1M
  • Frequency Response: 100hz - 20khz
  • Nominal Impedance: 4 Ohms
  • RMS/Max: 300W/600W (pair)
  • Outside diameter: 6.625" 
  • Mounting Hole: 5.73"
  • Mounting Depth: 3.125"
  • Total Depth: 3.375
  • Bolt Circle: 6.22"

Velocity R65 6.5" Mid-Bass Speakers

  • Size mm (in.) 165 (6.5)
  • Power Handling - Peak 400W
  • Power Handling - Continuous 150W
  • Impedance Ω 4
  • Frequency response Hz 100 ÷ 10k
  • Sensitivity dB SPL 97
  • Voice coil Ø mm (in.) 38,6 (1.5)
  • Magnet Neodymium
  • Cone/Dome Water repellent pressed paper

What's Included

  • 1 Velocity RZA1000.4 - 1,100 Watt 4 Channel Amplifier
  • 1 Pair Velocity RZ65H Coax Horn 6.5" Speakers
  • 1 Pair Velocity R65 6.5" Midbass Speakers
  • 1 Pair Replacement Grills for Tour Pack
  • 1 Pair Speaker Spacers for Tour Pack

What's Not Included

  • Speaker Adapters
  • Speaker Grills
  • Wiring *unless plug and play option is selected