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Description

Sundown Audio SALT-4

SALT‑4 is a high‑power, mono‑block Class‑D amplifier from the SALT series by Sundown Audio. It’s designed for serious subwoofer or SPL (sound‑pressure‑level) car audio systems, delivering massive power even on standard 12 V automotive electrical systems (i.e. no need for a special high‑voltage supply). The amp is linkable (you can strap two units together), and includes a wired remote level/bass‑control knob. Built‑in protections (thermal, voltage, speaker‑short, DC‑offset) and a heavy‑duty heatsink ensure the amplifier stays reliable under extreme load.


Specifications

Specifications
Product Sku
SALT-4
Amplifier Type
Monoblock
1 Ohm RMS Power
4,000 x 1
2 Ohm RMS Power
2,000 x 1
4 Ohm RMS Power
1,000 x 1
Linked Power
8,000 x 1 @ 2 ohms RMS (when linked)
Efficiency
90%<
Frequency Response
10Hz-250Hz
Variable Crossover Slope
N/A
Variable Crossover Subsonic Slope
N/A
Operation Voltage
DC 9V-15.5V power input
Recommended Fuse
400Amps
Tested Voltage & THD
12.8V & Less Than 1% THD
Signal / Noise Ratio
90DB<
Damping Factor
400<
Variable 12dB Subsonic Filter
N/A
Variable 12dB High Pass Filters
N/A
Variable 12dB Low Pass Filters
N/A
Variable 24dB Low Pass Filters
35Hz-250Hz
Variable 24dB Subsonic Filters
10Hz-50Hz
Dimensions
Length
22.05″
Width
8.67″
Height
2.80″

 


Feature

  • Input Sensitivity : 6V – 0.2V
  • Dual MOS-FET PWM Power Supply
  • Efficiency : 90% <
  • Signal / Noise Ratio : 90DB <
  • Damping Factor : 400 <
  • Frequency Response : 10 Hz – 250 HZ
  • Tested Voltage & THD : 12.8V & Less Than 1% THD
  • Operation Voltage : DC 9V – 15.5V Power Input
  • Recommended Fuse : 400 Amps
  • Dimensions : 22.05” L x 8.67” W x 2.80” H

About The Product

Producing optimum power at realistic voltages (the 12s, rather than needing 14+ volts), the SALT – Sundown Audio Low-Voltage Technology – is Sundown’s answer! SALT amplifiers represent the pinnacle of Korean Class-D amplifier technology. Whether you are a world-class SPL competitor or simply want to bang harder than absolutely anyone else, the SALT series will be right at home in your system. 

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Questions and Answers

Q1: What is the power output of SALT‑4?
A1: At 4 Ω mono it delivers 1,000 W; at 2 Ω mono 2,000 W; at 1 Ω mono 4,000 W RMS; when two SALT‑4 units are linked, it can output up to 8,000 W @ 2 Ω.
Q2: What features and tuning controls does it include?
A2: It includes a 24 dB/Oct variable low‑pass filter (35–250 Hz), a 24 dB/Oct variable subsonic filter (10–50 Hz), bass boost at 45 Hz (0–9 dB), and a 0–180° phase shift control, giving flexibility when tuning for subwoofers and enclosures.
Q3: Is SALT‑4 stable at low impedance?
A3: Yes  it supports 1 Ω load stability (mono mode), making it suitable for demanding subwoofer configurations.
Q4: What protections and monitoring does the amplifier have?
A4: The amp incorporates 4‑way protection: thermal protection, voltage protection, speaker‑short protection, and DC‑offset protection. It also comes with a wired remote control that shows voltage, temperature, and clipping state.
Q5: What are the basic electrical / technical specs (voltage range, sensitivity, fuse, etc.)?
A5: Input sensitivity: 0.2–6 V. Operating voltage: DC 9–15.5 V. Frequency response: 10–250 Hz. Recommended fuse: 400 A. Minimum impedance (mono): 1 Ω / (bridged) 2 Ω.

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