Description

Hertz SP 4.500 – 4 Channel Advanced D-Class Car Amplifier (600W RMS)

Hertz SP 4.500 – Compact High-Power 4 Channel Amplifier with Advanced D-Class Technology

The Hertz SP 4.500 is a powerful 4-channel car amplifier featuring ADC (Advanced D-Class) technology, engineered to deliver high efficiency, strong output power and excellent sound control in a compact chassis.

Designed for premium aftermarket audio systems and OEM upgrades, the SP 4.500 provides up to 150W RMS × 4 channels at 2 ohms and 300W RMS × 2 channels in bridged mode, making it a versatile solution for powering component speakers, active front stages or speaker systems combined with a subwoofer.

With advanced crossover controls, high damping factor, ultra-low distortion and IP55 protection rating, the Hertz SP 4.500 delivers reliable performance even in demanding automotive environments.

Advanced D-Class Technology (ADC)

The Hertz SP 4.500 uses Advanced D-Class (ADC) amplifier technology, combining the advantages of Class-D efficiency with high-quality audio reproduction.

Key benefits:

• High efficiency operation
• Powerful output from a compact chassis
• Reduced heat generation
• Excellent thermal stability
• Precise speaker control
• Low distortion sound reproduction

ADC technology allows the SP 4.500 to deliver powerful performance while maintaining Hertz’s signature musical accuracy.

Powerful Multi-Channel Performance

RMS Power Output (14.4V, 1% THD)

4-Channel Mode

4 Ω Load

• 4 × 90W RMS

2 Ω Load

• 4 × 150W RMS

3-Channel Mode

4 Ω Load

• 2 × 80W + 330W RMS

2 Ω / 4 Ω Load

• 2 × 145W + 300W RMS

Bridged 2-Channel Mode

4 Ω Load

• 2 × 300W RMS

Total Power

• 600W RMS

The flexible channel configuration allows the SP 4.500 to be used in multiple applications:

• Front and rear speaker amplification
• Active speaker systems
• Component speaker upgrades
• Speaker + subwoofer combinations

Premium Audio Performance

The Hertz SP 4.500 is designed for accurate and dynamic music reproduction.

Technical highlights:

• Frequency Response: 10 Hz – 35 kHz
• Signal-to-Noise Ratio: 100 dBA
• THD: <0.02%
• Damping Factor: >150

These specifications provide:

• Clean and detailed highs
• Powerful midbass response
• Controlled bass reproduction
• Accurate speaker movement

Advanced Crossover Controls

The SP 4.500 includes a complete adjustable crossover section for precise system tuning.

Channels 1-2

• Full Range
• High-Pass Filter: 50 Hz – 5 kHz
• Low-Pass Filter: 50 Hz – 5 kHz
• 12 dB/Oct slope

Channels 3-4

• Full Range
• High-Pass Filter: 50 Hz – 5 kHz
• Low-Pass Filter: 50 Hz – 5 kHz
• 12 dB/Oct slope

Bass Boost

• Adjustable Bass Boost: 0 – 8 dB @ 45 Hz
• Available on rear channels with LPF activated

This allows precise adjustment for different speaker configurations and vehicle acoustics.

OEM Integration & Installation Flexibility

The Hertz SP 4.500 is designed for compatibility with modern factory audio systems.

Features include:

• RCA Pre-In inputs
• Speaker-level inputs
• Automatic Remote Turn-On via speaker signal
• Adjustable input sensitivity
• Compact installation design

The amplifier can easily integrate into factory infotainment systems without replacing the original head unit.

Compact & Durable Construction

The SP 4.500 combines powerful performance with a compact aluminium chassis.

Design advantages:

• Compact dimensions: 192.7 × 130 × 49 mm
• Lightweight construction: 2.15 kg
• Efficient passive cooling
• IP55 protection rating
• Designed for automotive environments

The IP55 rating provides improved resistance against dust and moisture, increasing reliability in vehicle installations.

Key Benefits

• Premium 4-channel Advanced D-Class amplifier
• Up to 4 × 150W RMS @ 2 Ω
• Up to 2 × 300W RMS bridged
• Total 600W RMS output
• High efficiency ADC technology
• Ultra-low distortion (<0.02%)
• Adjustable HPF and LPF filters
• Bass Boost control
• OEM audio integration support
• Compact and durable design
• IP55 protection rating

Recommended Applications

The Hertz SP 4.500 is ideal for:

• Premium factory audio upgrades
• Component speaker systems
• Active front stage installations
• Front and rear speaker amplification
• Speaker + subwoofer setups
• Custom car audio builds

Technical Specifications

Why Choose Hertz SP 4.500?

The Hertz SP 4.500 delivers an excellent combination of power, efficiency and compact installation flexibility. Thanks to Advanced D-Class technology, high-current output capability and professional tuning features, it is a perfect amplifier for enthusiasts looking to significantly improve their vehicle’s audio performance.

Whether upgrading factory speakers or building a custom premium sound system, the SP 4.500 provides clean power, accurate control and Hertz reliability.

Upgrade Your Car Audio Experience

A high-quality amplifier is essential for unlocking the full potential of premium speakers. The Hertz SP 4.500 provides the power, control and tuning flexibility needed for a detailed and powerful in-car listening experience.

Choose Hertz SP 4.500 for advanced amplification, compact design and Italian audio engineering.