Harley 4 Overdrive Speaker Full System with Amplifier & DSP SKU: Maestro-Velocity-OD-4

Regular price $2,849.99 $2,619.99


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

Velocity Overdrive Speakers Are the Absolute Top of the Line With Both the Highest Output as Well as the Best Sound Quality

These speakers deliver on a true live concert experience that just can not be found in any other speaker set. Velocity OverDrive is as good as it gets. This full 4 speaker system has all of the best components and is tuned for you and ready to rock. 

Velocity R65 Neo 6.5”  Midranges 

The snap of the midbass is sharp and authoritative. The fairing mids (R65 Neo) are perfectly matched for the available air space in fairing speaker pods of ‘14 and later Street Glides and Road Glides. The upper frequency response is smooth and warm sounding thanks to the light weight yet rigid impregnated cone material. The cone geometry of these speakers is far superior to other pro audio type midranges on the market. The R65 Neo has a very unusual upper mid-range and high-frequency efficiency that makes it much louder when paired with horn-loaded tweeters than all other mid-range speakers. This is because the mid-range can couple to the tweeters output without shifts and gaps in phase or frequency response. 

Velocity RZ75H Compression Horn Tweeters

The first thing that you will notice about this speaker system is that the compression horn tweeters are silky smooth sounding and do not have that typical harsh horn sound at all. They are sparkly and lively sounding. These horns are very much capable of playing louder than all of the other speakers on the bike but they are also level matched, phase matched, and tuned to perfectly compliment the Velocity mid-ranges, making the combination of the two speakers as loud and beautiful sounding as can be. 

Velocity R690 6x9 Woofers

We designed the very best 6x9 in existence for Harley baggers. The R690 thrives in a saddlebag as an enclosure. We designed these speakers with an extra long voice coil which allows the speakers to handle bass at extreme high levels of output. We also designed these speakers to have an abnormally smooth and extended high frequency range so that you can hear those vocals loud and clear while flying down the freeway. And of course we have paired the R690s Velocity to our RZ75H compression tweeters so that you get that same beautiful upper frequency extension in the rear as you are getting from the fairing. 

Velocity RZA1000.4 amplifier

The RZA1000.4 is the very best-sounding amplifier made specifically for Harley use. This amplifier has better speaker cone control at high volumes for better bass, and far better high frequency fidelity than other amplifiers. Natively compatible with factory Harley radios and aftermarket radios alike, the RZA1000.4 has a super wide range input (.41 to 10 volts) that is balanced so that it can accept anything from a standard line level RCA to a high voltage speaker level input directly from a factory radio. And it does this without the need for any noisy line levelers. This amplifier uses a far superior internal power supply to other amplifiers and can sustain extreme performance where other amplifiers just run out of gas and clip or drop in volume. This is a beast of an amplifier in a small footprint. This amplifier features a full chassis heat sink for more performance in a much smaller size package. The full chassis heat sink also allows for the amplifier to be mounted in any position and to keep cool even on the hottest summer days. 

Maestro DSR1 DSP

This kit uses the awesome Maestro DSR1 digital sound processor to seamlessly integrate the aftermarket amplifiers and speakers with your factory or aftermarket Harely radio. Is is industry standard to use this sound processor to make the factory Harley radio perform and integrate with aftermarket speakers and amplifiers, but i also plays a critical role in systems with aftermarket radios as well.

Optional Plug & Play Connections and Harnesses

All of the wire harnesses and connections that you will need to install this system. This includes a fully loomed OFC 8 gauge power harness, waterproof fuse holder (pre-installed), an amplifier mounting pad, a fairing speaker output harness with service disconnects, a rear speaker output harness for the saddlebags with service disconnects in the fainting and at both bags as well as at each lid inside the bags, Plug and play crossovers (front and rear), plug and play 4 channel signal input from the radio, accessory power, and remote output expansion harness for external amplifiers. 

Note: It is important to add details of your bike in the order notes such as any factory amplifiers or if your bike is an ultra model so that we can customize the wire harnesses for your specific bike. Feel free to give us a call for clarification. 1(888)311-0016


  • 2014+ Street Glide, Electra Glide 
  • 2015+ Road Glide - 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


  • Maestro 1 Year
  • Velocity 2 Years standard or 3 years if installed by an authorized Velocity Dealer
  • Wire Harnesses 5 Year


Water Resistant

Extreme 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.

Velocity R65 Neo 6.5" Midrange 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

Velocity RZ75H Compression Horn Tweeters

  • Model: RZ75H
  • Sensitivity: 105dB 1W/1M
  • Frequency Response: 2.5k - 20kHz
  • Nominal Impedence: 4ohm
  • RMS/MAX: 50W/100W
  • FS: 1.71khz
  • Over-All Diameter: 2.95"
  • Over-All Depth: 1.57"
  • Cut-Out Diameter: 2.0"
  • 12 dB Crossover Included

Velocity R690 6x9 Speakers

  • Max power 300 Watts Pair
  • Nominal power 150 Watts Pair
  • Impedance 2 Ω
  • Freq. Response 60 Hz - 20 KHz
  • Sensitivity (2,83V/1m) 93 dB
  • Magnet Ferrite Magnet size Ø x h 85 x 17 mm 3,35“x 0,67“
  • Total driver displacement 0,3 l 0,011 cf
  • Weight of one component 2,315 lb
  • Voice coil Ø 25 mm 0,984“
  • Voice coil height 11 mm 0,433“

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 R65 Neo 6.5" Speakers
  • 2 Pair Velocity RZ75H Compression Horn Tweeters (front & rear)
  • 2 Pair Velocity OverDrive Plug & Play Passive Crossovers
  • 1 Pair Velocity R690 6x9 Woofers
  • 1 Pair Model Specific (Road Glide or Street Glide) Fairing Speaker Grills with OverDrive mounting provisions and hardware
  • 1 Pair Velocity OverDrive 6x9 Compression Horn Mounting Adapters
  • 2 Rolls Speaker Mounting Gasket
  • 1 USB Drive with Software, Test Tracks, Installation Articles, Installation Videos
  • 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 (signal input connections, speaker output connections, power connections and cables, saddlebag speaker harness with disconnects, acessory power input).
  • Optional Lid Cut-In Kit
  • Optional DSP Tune