Velocity RZP1500.4 – 1,500-Watt 4-Channel Motorcycle Amplifier | Built for Harley-Davidson Baggers

Velocity RZP1500.4 – 1,500-Watt 4-Channel Motorcycle Amplifier

Big Power. Small Footprint. Ready for the Road.

Meet the Velocity RZP1500.4, a high-output 4-channel motorcycle amplifier engineered with Harley-Davidson touring baggers in mind. Delivering up to 350 watts RMS per channel at 2 ohms, this compact powerhouse brings serious performance to demanding motorcycle audio systems without sacrificing valuable installation space.

Built for the challenges of motorcycle riding, the RZP1500.4 features an IP65-rated sealed aluminum chassis, fanless cooling, and protected electrical connections. No exposed cooling fans or ventilation openings means fewer opportunities for moisture, dust, and road debris to enter the amplifier.

One Amplifier. Multiple Possibilities.

Whether you're running a four-speaker setup, powering up to eight compatible 4-ohm speakers, or building a system combining mids, highs, and subwoofers, the RZP1500.4 gives you the flexibility to build the sound system you want.

Performance Highlights

• 200W RMS × 4 @ 4Ω – Clean, powerful output for four-channel systems.

• 350W RMS × 4 @ 2Ω – High-output performance for demanding speaker configurations.

• 600W RMS × 2 Bridged @ 4Ω – Additional flexibility for compatible speaker or subwoofer applications.

• IP65-Rated Construction – Sealed, weather-resistant design for motorcycle environments.

• Fanless Aluminum Chassis – Efficient heat dissipation without exposed cooling fans.

• Adjustable Crossovers – Independent front and rear tuning with HPF, LPF, and full-range operation.

• Built-In Protection – Thermal, overload, and short-circuit protection.

8-Gauge Power & Ground Harness Included!

The RZP1500.4 comes with an 8-gauge power and ground harness at no additional charge.

While many amplifiers require a separate power wiring purchase, Velocity includes the essential power and ground harness with the amplifier. It's one less component to source when planning your installation.

Engineered for Motorcycle Audio. Versatile Beyond It.

From Harley-Davidson Street Glides and Road Glides to custom motorcycle and powersports audio builds, the Velocity RZP1500.4 combines high-output performance, compact construction, and installation flexibility in one amplifier.

Serious output. Motorcycle-ready construction. Power harness included.

VELOCITY RZP1500.4 TECHNICAL SPECIFICATIONS

GENERAL
- Manufacturer: Velocity Speaker Design
- Model: RZP1500.4
- Amplifier Configuration: 4-Channel
- Chassis: Sealed Aluminum
- Cooling: Fanless
- Weather Protection: IP65 Rated

POWER & PERFORMANCE
- Power @ 4 Ohms: 200W RMS x 4
- Power @ 2 Ohms: 350W RMS x 4
- Bridged Power @ 4 Ohms: 600W RMS x 2
- Rated Test Voltage: 14.4V DC
- Frequency Response: 20Hz–20kHz
- Total Harmonic Distortion: Less Than 0.1%
- Signal-to-Noise Ratio: Greater Than 85dB

AUDIO CONTROLS & CROSSOVERS
- Crossover Modes: High-Pass / Low-Pass / Full-Range
- Adjustable Crossover Range: 40Hz–400Hz
- Gain Controls: Independent Front & Rear

INPUTS & CONNECTIONS
- Input Selection: High-Level / Low-Level
- Low-Level Input Sensitivity: 0.7V–6V
- High-Level Input Sensitivity: 1.2V–10V
- Remote Turn-On: 12V Remote / DC-Offset Sensing
- Electrical Connections: Sealed Outboard Connections
- Adjustment Protection: Protective Control End Cap

PROTECTION FEATURES
- Thermal Protection
- Overload Protection
- Short-Circuit Protection

INSTALLATION NOTES
- Requires proper amplifier tuning and compatible speaker impedance.
- Electrical system must support the amplifier's current demands.
- Two 4-ohm speakers wired in parallel create a 2-ohm load per channel.
- Amplifier power is shared between speakers connected to the same channel.
- Allow adequate mounting clearance and heat dissipation.

PACKAGE CONTENTS
- Velocity RZP1500.4 4-Channel Amplifier
- 8-Gauge Power & Ground Harness

IMPORTANT
Bike-specific speaker adapters, mounting brackets, and integration components are not included unless otherwise specified.