Hertz SP 4.500 - Advanced D-Class amplifier for high efficiency
Front view of the Hertz SP 4.500 compact 4-channel D-Class amplifier with IP55 water resistance.
Top-down view of the Hertz SP 4.500 amplifier showcasing its durable aluminum chassis and cooling design.
Side view of the Hertz SP 4.500 amplifier featuring high-efficiency power output and compact size.
Back panel of the Hertz SP 4.500 amplifier displaying input, output, and control settings.
Hertz SP 4.500 amplifier RCA and speaker input plugs designed for universal compatibility.
Close-up of Hertz SP 4.500 amplifier power and speaker plug connections for secure wiring.
ball shown to understand the size of this Hertz 4.500 size,

Hertz SP 4.500 | Compact 4-Channel D-Class Amplifier

Hertz SP 4.500 - Advanced D-Class amplifier for high efficiency

Hertz SP 4.500 | Compact 4-Channel D-Class Amplifier

$449.00 $510.00
Product description

Powerful, Compact, and Built for Extreme Conditions

The Hertz SP 4.500 is a high-efficiency, 4-channel D-Class amplifier, engineered to deliver exceptional sound performance in motorcycles, sports cars, and trucks. Designed with rugged durability and advanced power efficiency, this amplifier provides crystal-clear audio with minimal heat output, making it ideal for compact and extreme environments.

With up to 600W total output, IP55-rated weather resistance, and universal compatibility with factory and aftermarket head units, the SP 4.500 ensures top-tier sound performance in any vehicle.

📞 Contact us for pricing and professional installation!


🚀 Key Features & Benefits:

Advanced D-Class Technology87% efficiency, reducing power consumption and heat for consistent, high-output performance
High-Power Output:

  • 90W x 4 @ 4Ω
  • 150W x 4 @ 2Ω
  • 300W x 2 (bridged) @ 4Ω
  • Total Output: 600W
    Compact & Rugged DesignAluminum chassis (7.58” x 5.12” x 1.93”) with IP55 water & dust resistance, perfect for motorcycles and outdoor applications
    Universal CompatibilityWorks with factory & aftermarket head units with Universal Speaker Simulators (USS) for speaker load detection bypass
    Custom Sound TuningAdjustable high-pass & low-pass crossovers (50Hz – 5kHz, 12dB/Oct), plus bass boost at 45Hz (0-8dB) for enhanced sound control

🔹 How the Hertz SP 4.500 Compares to Other Compact Amplifiers

Feature Hertz SP 4.500 Rockford Fosgate TM400X4ad JL Audio XD400/4v2
Power Output (4Ω) 90W x 4 100W x 4 75W x 4
Bridged Power (4Ω) 300W x 2 200W x 2 200W x 2
D-Class Efficiency ✅ Yes (87%) ✅ Yes ✅ Yes
Weather-Resistant (IP55) ✅ Yes ❌ No ❌ No
Universal Speaker Simulators (USS) ✅ Yes ❌ No ❌ No
Adjustable Crossovers & Bass Boost ✅ Yes ✅ Yes ✅ Yes
Compact Size & Low Heat Output ✅ Yes ✅ Yes ✅ Yes

Ideal for motorcycles, sports cars, and trucks needing a high-power, compact amplifier
More efficient than traditional Class A/B amps, reducing power draw and heat
Weatherproof design makes it perfect for outdoor and marine applications


📢 What Users Are Saying About the Hertz SP 4.500

⭐⭐⭐⭐⭐ "Perfect amp for my Harley!"
"The Hertz SP 4.500 delivers crystal-clear sound with plenty of power. It fits perfectly in my bike's fairing, and the waterproofing is a game changer!" – Mike D.

⭐⭐⭐⭐⭐ "Amazing power in a small package!"
"This amp pushes my speakers effortlessly. Compact, efficient, and powerful – exactly what I needed for my sports car!" – Sarah T.


💡 Who Should Buy the Hertz SP 4.500?

Motorcycle riders looking for a weather-resistant, high-power amp that fits in tight spaces
Sports car owners needing a compact amplifier with high output and low heat production
Truck and off-road vehicle enthusiasts wanting durable, high-performance sound without bulky equipment
✔ **Anyone looking for a rugged, D-Class amplifier that balances power and efficiency


❓ FAQ – Hertz SP 4.500 Amplifier

Q: Is the Hertz SP 4.500 waterproof?
A: Yes, it has an IP55 rating, making it resistant to water, dust, and dirt—perfect for motorcycles and off-road vehicles.

Q: Can I install this amplifier in my motorcycle?
A: Absolutely! Its compact size and weatherproof design make it ideal for fairing or saddlebag installations.

Q: Does this amp work with factory radios?
A: Yes, it includes Universal Speaker Simulators (USS) to bypass factory speaker load detection systems.

Q: How much power does the Hertz SP 4.500 output?
A: It delivers 90W x 4 @ 4Ω, 150W x 4 @ 2Ω, and 300W x 2 bridged @ 4Ω, with a total peak power of 600W.


💻 Request a Quote or Speak to an Expert!

We offer expert installation services to ensure your system is perfectly integrated into your vehicle.

📍 Stereo Installs
7471 Tyler Blvd, Ste. B, Mentor, Ohio 44060
📞 (440) 525-2001

🔗 Request a Customized Quote: https://stereoinstalls.com/pages/get-a-quote

🛒 Upgrade Your Vehicle’s Audio Today!
Request a Quote for Your Specific Vehicle
Professional Installation Available – Schedule Now!

🚀 Get powerful, crystal-clear sound with the Hertz SP 4.500 – the best compact amplifier for motorcycles, sports cars, and trucks!


Shipping & Return

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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.