Sign In

The Down4Sound JP454 is a high‑power, 4‑channel Class D amplifier built for demanding car audio systems. With a total RMS output of 4,000 W, it's designed to drive big door speakers, subwoofers, or full 3‑way setups. The amp offers flexible filter options, clipping indicators, and a control knob for real-time voltage, temperature, and clipping status, making it ideal for serious audio enthusiasts.

Key Benefits

• Massive Output: Delivers 888 W × 4 at 2 Ω and 454 W × 4 at 4 Ω, with a bridged output of 1,645 W × 2. 
• Flexible Crossover Controls: Variable high-pass (20 Hz – 800 Hz) and low-pass (50 Hz – 800 Hz) filters, with ×1 and ×10 multipliers for precise tuning. 
• Bandpass Mode: Can operate in bandpass configuration on CH1/2 and CH3/4. 
• Clipping Indicators: “Signal Clipping IN” and “Clipping OUT” LEDs help monitor distortion levels. 
• Remote Control Knob: Aluminum remote with voltage, temperature, thermal, and clipping readouts. 
• Robust Build: Dual 1/0-gauge power and ground inputs for heavy-duty wiring. 
• Wide Operating Voltage: Supports 9 V to 15.5 V — good for high-power systems. 
• High Fidelity: 10 Hz–21 kHz frequency response and 94 dB signal-to-noise ratio for clean, accurate audio. 

Technical Specifications

• Frequency Response: 10 Hz – 21 kHz 
• Signal-to-Noise Ratio (SNR): 94 dB 
• Damping Factor: 170 (tight control over speakers) 
• Input Sensitivity: 0.2 V – 6 V 
• Filters:
• High-pass: 20–800 Hz (×1 / ×10) 
• Low-pass: 50–800 Hz (×1 / ×10) 
• Power Ratings:
• 888 W × 4 @ 2 Ω 
• 454 W × 4 @ 4 Ω 
• 1,645 W × 2 (bridged) @ 4 Ω 
• Working Voltage: 9 – 15.5 V 
• Clipping Indicators: Red / Blue / Violet LEDs 
• Physical Dimensions & Weight
• Dimensions (L × W × H): 15.74″L × 9.37″W × 2.71″H 
• Weight: ~25.00 lb (according to Crystal Audio Solutions) 

Installation & Compatibility

Use heavy gauge wiring (1/0‑gauge) for both power and ground to reliably deliver the needed current. 

Mount in a well-ventilated area to allow the internal cooling fan to work efficiently.

Use the provided remote knob to monitor voltage, temperature, and clipping during tuning.

Set crossovers appropriately:

High-pass: around 80–100 Hz for mid/high speakers (or based on your tuning)

Low-pass: around 80–120 Hz for subwoofers (or per your system needs)

Verify that your electrical system (alternator, battery, wiring) can support the high current draw this amp may demand.

FAQS

• What makes the JP 454 a strong choice for mids and highs?
  The JP 454 provides clean, powerful multi-channel output, perfect for midrange drivers and tweeters in high-volume builds.
• Can the JP 454 be used in combination with a monoblock amplifier?
  Yes, it pairs perfectly with subwoofer amplifiers, allowing you to build a complete multi-amp system.
• Does the JP 454 offer good sound quality at high volume?
  Definitely—its clean signal and stable power delivery make it ideal for loud, distortion-free playback.
• Is the JP 454 compatible with DSP tuning?
  Yes, using a DSP enhances system control, providing better crossover points and improved sound definition.