Hertz SPL Show SP 4.500 - Compact 4-channel amplifier with IP55 and high efficiency
The Hertz SPL Show SP 4.500 is a 4-channel amplifier that delivers high power in a compact space. The updated Hertz ADC (Advanced D-Class) amplifier achieves up to 85% efficiency and provides 90 W x 4 at 4 Ω or 300 W x 2 bridged at 4 Ω. With its IP55 protection, ultra-compact dimensions, and flexible filters, it is ideal for motorcycles, under the seat of sports cars, or behind the seat in trucks. A signal-to-noise ratio of 100 dBA and precisely adjustable crossovers ensure clear, controlled reproduction – even in challenging installation situations. Available at Carhifi.shop.
Technical Highlights
- Advanced D-Class (ADC) amplifier with up to 85% efficiency
- Compact, durable housing with IP55 protection
- Signal-to-noise ratio: 100 dBA
- Flexible filters: High-pass and low-pass 50–5,000 Hz each, 12 dB/Oct.
- Bass Boost on OUT 3–4: 45 Hz, 0–8 dB (LP mode only)
- Low distortion: THD 0.02% at 1 kHz, 4 Ω, 70% Pn
- Damping factor >150 (1 kHz, 4 Ω, 2 Vrms)
- Pre-amplifier input 0.6–6 Vrms; High-Level 2.2–22 Vrms
- Auto Turn-On via DC-REM (Speaker-Level BTL): 3.5–7 V DC
Output Power
- RMS @ 14.4 V, THD 1%
- 4 Channels: 90 W x 4 (4 Ω)
- 4 Channels: 150 W x 4 (2 Ω)
- 3 Channels: 80 W x 2 (4 Ω) + 330 W x 1 (4 Ω)
- 3 Channels: 145 W x 2 (2 Ω) + 300 W x 1 (4 Ω)
- 2 Channels (bridged): 300 W x 2 (4 Ω)
- Total Power: 600 W
Filters & Signal Processing
- Channel 1–2: Full-Range, HP 50–5,000 Hz (12 dB/Oct.), LP 50–5,000 Hz (12 dB/Oct.)
- Channel 3–4: Full-Range, HP 50–5,000 Hz (12 dB/Oct.), LP 50–5,000 Hz (12 dB/Oct.)
- Bass Boost OUT 3–4: 45 Hz, 0–8 dB (active in LP mode)
Installation & Compatibility
Thanks to its compact design, the SP 4.500 can be placed in tight spaces – e.g., on a motorcycle, under seats in sports cars, or behind seats in trucks. The minimum impedances allow for flexible setups in 2, 3, or 4-channel operation. IP55 protects against dust and splashes – a plus for outdoor use or in open vehicles.
- Minimum Load Impedance:
- 4-channel operation: 2 Ω
- 3-channel operation: 2 Ω + 2 Ω + 4 Ω
- 2-channel (bridged): 4 Ω
- Auto-Remote via Speaker-Level available; classic remote input also present
Technical Data
- Type: 4-channel amplifier
- Supply voltage (nominal): 11–15 V DC
- Operating voltage range (pulse): 6–16 V DC
- Quiescent current: 0.9 A
- Quiescent current in off mode: 0.03 mA
- Current draw at 14.4 V DC, MIN load (max. music power): 50 A
- Remote input: 6–15 V DC (9 mA)
- DC-REM Auto Turn-On (Speaker-Level BTL): 3.5–7 V DC
- Distortion (THD): 0.02% at 1 kHz, 4 Ω, 70% Pn
- Damping factor: >150 (1 kHz, 4 Ω, 2 Vrms)
- Frequency response: 10 Hz – 35 kHz (−3 dB)
- Signal-to-noise ratio: 100 dBA (A-weighted, 1 V input)
- Input sensitivity RCA: 0.6–6 Vrms
- Input sensitivity High-Level: 2.2–22 Vrms
- Adjustable crossovers: Yes (HP/LP each 50–5,000 Hz, 12 dB/Oct.)
- IP protection rating: IP55
- Operating temperature: 0 °C to 55 °C
- Weight: 2.15 kg
Dimensions
- Overall dimensions (L x W x H): 192.7 x 130 x 49 mm
- Relevant reference points:
- A: 185.7 mm
- B: 192.7 mm
- C: 107 mm
- D: 130 mm
- E: 49 mm
