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Description

Sundown Audio SDX-800.1

Sundown Audio SDX-800.1 is a high-power mono Class D amplifier designed to deliver deep, clean, and powerful bass for subwoofer applications. Its efficient Class D design ensures strong output while minimizing heat, and the compact chassis allows easy installation in tight spaces. The amplifier features adjustable low-pass and subsonic filters, comprehensive protection circuitry (thermal, over/under-voltage, short-circuit, DC-offset), and LED indicators for monitoring, making it ideal for dedicated subwoofer setups or enhancing a full car audio system with controlled, high-output low-end performance.


Specifications

Specifications
Product Sku
SDX-800.1
Amplifier Type
Mono Block Class-D
1 Ohm RMS Power
1 x 400W at 1 Ohm
2 Ohm RMS Power
1 x 300W at 2 Ohm
4 Ohm RMS Power
1 x 175W at 4 Ohm
Recommended Fuse
40A
Signal / Noise Ratio
>90dB
Variable 12dB Low Pass Filters
50hz-250hz
Dimensions
Length
147mm
Width
102mm
Height
54mm

 


Feature

  • Mono Block Class-D Amplifier
  • 1 x 400W at 1 Ohm
  • 1 x 300W at 2 Ohm
  • 1 x 175W at 4 Ohm
  • Recommended Fuse Rating: 40A
  • LoW Pass Filter (-12dB/8) Variable: 50hz-250hz
  • Input Sensitivity: 6V Max
  • S/N: >90dB
  • Cast Aluminum Heat Sync
  • Water Resistant
  • Highpass / Lowpass / Bandpass Filter
  • Gain Adjustment 
  • Suitable for vehicles with start / stop function
  • Dimensions in mm (LxWxH): 147 x 102 x 54 mm

About The Product

Moderate power, tiny size, but at the top-end of Full-Range Class-D fidelity. The controls will have a removable cover that bolts down on top of them. The overall case is a big chunk of cast aluminum to keep temperatures in check!

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Questions and Answers

Q1: What is the power output of the SDX-800.1?

A1:
• 800 W × 1 @ 2 Ω
• 500 W × 1 @ 4 Ω

Q2: What amplifier class/design does it use?
A2: The SDX-800.1 is a mono Class D amplifier, designed for high efficiency, low heat, and strong subwoofer output.
Q3: Does it have adjustable filters for tuning?
A3: Yes, it includes a variable low-pass filter (40–250 Hz) and a subsonic filter (10–40 Hz) for precise subwoofer tuning.
Q4: What protection features are included?
A4: It features thermal protection, over/under-voltage protection, short-circuit protection, DC-offset protection, and LED indicators for safe and stable operation.
Q5: What are the installation and electrical specifications?
A5:
• Input Sensitivity: up to ~6 V
• Signal-to-Noise Ratio: 92 dB
• Operating Voltage: 10.5–15.5 V DC
• Compact, durable heat-sink chassis for tight installations

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