Harley 4 Horn Loaded Coax Speaker Amplifier & DSP System | Maestro & Velocity SKU: Maestro-RZH-4

Regular price $2,059.96 $1,875


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

Step Into Big Pro Audio Sound Without the Complexities

The Maestro/Velocity is the best combination of big performance and easy setup. This system is a fast install and the tuning is uncharacteristically friendly for a pro audio speaker system. This is because we specifically engineered our RZH series speakers to sound better than all other pro audio speakers right out of the box. Additionally this system gives you the powerful onboard Musway sound processor, and optionally it can ship already tuned specifically for the RZH speakers. Just drop them in and jam out with a big concert sound.

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 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


  • Fitment
  • 2014+ Street Glide, Electra Glide - Drop in fit. Rear speakers require 6x9 lids, adpters, or our optional cut in kit. 
  • 2015+ Road Glide - Requires heat gun modification to fairing speaker pods for magnet clearance. Requires light modification to headlight mounting brackets (plastic) for amplifier width. 
  • 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
  • Speakers Not Waterproof -These speakers are perfect for fair weather riders but should not be used in the rain. The rear 6x9s have an open voice coil.


  • Maestro DSR1 1-year
  • Velocity 2 year standard or 3 year if installed by an authorized velocity retailer


Very High Level Performance

Road Glide

Street Glide


Velocity RZA1000.4 Amplifer

  • 4 x 150/255 Watts RMS @ 4/2  Ω 
  • 2 x 550 Watts RMS @ 4  Ω bridged
  • 4 x High Level Input
  • 4 x Loudspeaker Output amplified
  • Dimensions: 9.1" L x 4.1 W x 1.54 H

Maestro DSR1 DSP

  • 4 x RCA (High or Low Level) Inputs
  • 8 x RCA Outputs
  • Frequency response: 20 - 20k +/- 0.5 dB
  • 239 Bands of equalization for aftermarket tuning
  • Adjustable crossovers with selectable slope and crossover-type
  • Crossover Frequency: 20 - 20kHz
  • Time Alignment of up to 10msec of delay on each channel
  • Bluetooth 4.0 connectivity for convenient setup
  • Interactive Tuning Interface Controlled via Android/ iOS App
  • Optional PLC2 Level Controller with assignable functions
  • Dimensions (L x W x H): 5.12 in. x 4.04 in. x 1.26 in.

Fairing 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"

Lid Speakers

  • Sensitivity: 101db 1W/1M
  • Frequency Response: 80hz - 20khz
  • Nominal Impedance: 4 Ohms
  • RMS/Max: 300W/600W (pair)
  • Mounting Depth: 3.75"
  • Total Depth: 4"

What's Included

Video: Optional "Make Life Easy Package"

Wistia video thumbnail
  • 1 Maestro DSR1 DSP
  • 1 Velocity RZA1000.4  1100W 4-Channel Amplifier
  • 1 Pair Velocity RZ65H 6.5" Speakers
  • 2 Pair Velocity OverDrive Plug & Play Passive Crossovers
  • 1 Pair Velocity RZ69H 6x9 Woofers
  • 2 Rolls Speaker Mounting Gasket
  • Optional MUST BE ADDED BEFORE CHECKOUT Plug & Play Wire Harnesses (signal input connections, speaker output connections, power connections and cables, saddlebag speaker harness with disconnects, acessory power input).

What's Not Included

Must add the following options before adding to cart

  • Optional Flash Tool
  • Optional Plug & Play Wire Harnesses
  • Optional Lid Cut-In Kit
  • Optional DSP Tune