Hertz Premium A2B Stage 4 Plug & Play Amp and Speaker Package for 2025 Harley Davidson® Street Glide Ultra Motorcycles adds Tour Pak Pods

Starting at $2,613.90

Sku:HDPKG2908
  • 4-Speaker Replacement Harley Davidson® Motorcycles with Tour Paks
  • Prewired amp so all you have to do is connect power and ground to battery and connect remote wire. All other wiring is complete.
  • For 2025
  • More Features!

Hertz SP4.900-A2B Amplifier Hertz SP4.900-A2B Amplifier

1000W RMS, Class D 2-3-4 channel amplifier
  • Plug-&-Play Kit for Harley Davidson® CVO Street Glides and CVO Road Glide
  • Prewired for factory radio harness
  • Gains and all settings come preset from us for your radio
  • $559.99

    20 in stock

Hertz Power/Ground Harness Hertz Power/Ground Harness

  • 8 gauge Power and Ground Harness with fuse holder
  • Pre-assembled plug and play to Hertz SP4.900 amp
  • More Features!
$79.99

20 in stock

Hertz 6.5" SX165NEO Upper Fairing Speakers Hertz 6.5" SX165NEO Upper Fairing Speakers

6-1/2 Inch (6.5) Full-Range Coaxial Speaker
  • Water Repellent Pressed Paper cone with a Rubber Surround
  • 1-7/16" PEI Dome Tweeter
  • Maximum Power - 200W, RMS Wattage - 100W, Impedance - 4 Ohm
  • More Features!
$359.99

20 in stock

Hertz Hog Badges for Factory Front Grilles Hertz Hog Badges for Factory Front Grilles

$0.00

20 in stock

Hertz 6.5" SV165NEO Tour Pak Speakers Hertz 6.5" SV165NEO Tour Pak Speakers

  • The terminals and mounting holes are compatible for installation on Harley-Davidson® motorcycles!
  • New SV 165 NEO features compact dimensions and light weight preserving excellent performance thanks to the use of Neodymium N38 H for the motor units
  • To allow a safe outdoor use without discoloration over time, cones has waterproofing and anti-UV treatment and motor units is painted with cataphoresis with insulated lead-wires to avoid oxidation.
  • More Features!
$359.99

20 in stock

BC-SPG Tour Pak Speaker Grilles BC-SPG Tour Pak Speaker Grilles

6-1/2" - 6-3/4" Motorcycle Speaker Grille
  • Metra 6.5"-6.75" Universal Speaker Grille
  • Sold As A Pair Including Mounting Hardware
  • 1 Year Warranty
  • More Features!
$20.00

20 in stock

Tour Pak Pods with Wiring Tour Pak Pods with Wiring

  • Includes Pods and Wiring Harness
  • Water Resistant
  • For 2014-2025 Harley Davidson®
  • More Features!
$266.95

20 in stock

Underseat Speaker Harness Underseat Speaker Harness

2-way splitter for rear audio
  • Pins into factory connector under seat
  • Modified for the new bikes
  • For adding 6x9’s or Tour Pak speakers
  • More Features!
$50.00

20 in stock

Speaker Polarity Tester Speaker Polarity Tester

  • A microphone at the top of the tester will pick up the test tone
  • LED indicators for +Polarity and -Polarity will light to indicate if the speaker polarity is in-phase or out-of-phase
  • powered by a 9V battery (NOT INCLUDED) and features a Low Battery LED indicator
  • More Features!
$16.99

20 in stock

Do you want to add Sound Deadening? Do you want to add Sound Deadening?

SoundSkins sound deadening can be added to:
Fairing, Saddlebag Lids and or Saddlebags
Used to reduce vibrations and improves audio output

$0.00

20 in stock

$2,933.90 $2,613.90

20 in stock

Starting at $109/mo or 0% APR with . Check your purchasing power

Description

Tired of struggling to hear your factory Harley speakers at highway speeds? Or constantly replacing blown speakers? You’re not alone!

At Volunteer Audio, we understand these common frustrations, and we’ve created a solution that will revolutionize your riding experience. Our Stage 4 amplifier and speaker system ensures your music sounds incredible, even at 100 mph.

Why Choose the Volunteer Audio Stage 4 System?

  • Exceptional Sound Clarity: Our package delivers powerful, clear audio, allowing you to enjoy your favorite tunes without distortion, no matter how fast you’re going.
  • Easy Upgrade: Keep your factory radio while enhancing your sound system. Our prewired amplifier is set up for optimal performance with your factory Skyline OS Infotainment radio.
  • Durability: The IP64 rated compact amplifier is moisture-resistant, and the Hertz speakers feature weather-resistant cones, making them perfect for any riding conditions.

What’s Included in the Stage 4 Package?

  • Prewired Amplifier: Gains and filters adjusted specifically for your factory Skyline OS Infotainment radio.
  • 1 Pair of Hertz SX165NEO 6.5” Upper Fairing Speakers: High-quality replacements for your factory speakers.
  • 1 Pair of Hertz SV165NEO 6.5” Tour Pak Speakers: Designed for clear sound and durability.
  • Hertz Power/Ground Harness: Ensures reliable power and grounding for optimal performance and longevity.
  • Volunteer Audio HD-A2B Interface: Seamlessly integrates with your Harley Davidson, enhancing connectivity and audio control.
  • BC-SPG Tour Pak Grilles: Stylish and functional grilles to protect your new speakers and complete your audio upgrade with a sleek look.

Why Volunteer Audio?

  • Pre-Configured Convenience: We do all the hard work for you. Your kit arrives with gains and filters already set, making installation straightforward.
  • Step-by-Step Support: Our detailed videos guide you through the installation process, and our lifetime tech support is always here to help.
  • Lifetime Tech Support: We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.

 


HD-A2B Amplifier Replacement Interface

Compatibility:

  • Designed for Harley Davidson models with the Skyline OS Infotainment Unit.

Purpose:

  • Allows the removal of the stock amplifier.
  • Facilitates the installation of a higher power amplifier.

Manufacturer:

  • Designed and manufactured by SeirenHD exclusively for Volunteer Audio.
  • Engineered and manufactured in the USA.

Integration Features:

  • Utilizes the same OE A2B chip for seamless integration.
  • Supports factory infotainment updates.
  • Retains factory features including:
    • Fader
    • EQ selections with DSP profile adjustments
    • Speed-controlled volume
    • Navigation prompts

DSP Specifications:

  • Specifically tuned for Hertz SP4.900 amplifier and Hertz Neo Motorcycle speakers.
  • Equalization:
    • 31-band equalizer for each independent channel.
    • 7-band parametric global EQ aligning with infotainment custom EQ settings.

Technical Specs:

  • RCA Outputs: 5 Channel, 4v RMS (Front, Rear, and Subwoofer connections)
  • Frequency Response: 20 Hz – 24 kHz
  • Signal to Noise Ratio: 112 dB
  • DSP Resolution: 32-bit
  • Operational Voltage: 6-28 volts
  • Current Consumption:
    • Idle: 14 microamps
    • Full Power: 300 milliamps

Hertz SP4.900 Amplifier

Our friends at Hertz have released a game changer for motorcycle audio! The Hertz SP4.900 amplifier offers a small footprint but huge output. It’s the most powerful amp available in its size, delivering 160W RMS @ 4Ω and 250W RMS @ 2Ω. With a remarkably low distortion rate of 0.02% THD, it’s the perfect choice for your motorcycle audio system.

Technical Specs:

  • Output Nominal Power (RMS) @ 14.4 VDC, THD 1%:
    • 4 Ch:
      • 160 W x 4 (4Ω)
      • 250 W x 4 (2Ω)
    • 3 Ch:
      • 160 W x 2 (4Ω) + 500 W x 1 (4Ω)
      • 250 W x 2 (2Ω) + 500 W x 1 (4Ω)
    • 2 Ch:
      • 500 W x 2 (4Ω)
    • Total Power RMS: 1000 W
  • Dyno Specs:
    • Box rating: 160 watts at 4Ω, Dyno reads 173 watts at 4Ω
    • Box rating: 250 watts at 2Ω, Dyno reads 288 watts at 2Ω

Ready to Elevate Your Ride?

At Volunteer Audio, we’re committed to providing you with an amazing sound system for your Harley Davidson. Our Stage 4 package is designed for top-notch performance and durability, transforming your motorcycle into a high-quality audio experience. Ready for a sound transformation? Let us help you get there!

Vehicle Information

  • 2025 Street Glide Ultra