Sundown Audio SALT-500.4

The  Sundown Audio SALT-500.4 is a premium 4-channel amplifier. As the latest model in the SALT series, this sound amplifier represents the pinnacle of Korean Class-D amplifier technology and is specifically designed for optimal performance at realistic operating voltages in the 12V range. You will be amazed by the attention to detail and groundbreaking features, ranging from temperature, voltage and clipping display to low-voltage technology. The striking titanium-colored design and robust construction make the SALT-500.4 an impressive addition to any audio system.

• The Sundown Audio SALT amplifiers represent the pinnacle of Korean Class-D amplifier technology. They stand on the shoulders of the three previous generations of Korean high-end amplifiers from 15 years ago (the SAZ v.1, SAZ, v.2 and SCV series) to achieve even higher performance. Our customers have been asking us for many years to produce amplifiers that deliver optimal performance at realistic operating voltages in the 12s range rather than 14+ volts. The SALT - Sundown Audio Low-Voltage Technology - series is our answer!
• Whether you're a world-class SPL competitor, a dedicated enthusiast, or just a fan of sound quality, the SALT range will feel right at home in your system. Each and every model has been designed with great attention to detail to ensure they'll put a smile on your face every time the music starts playing, and that they'll last for many years to come too.
• Cosmetically they are a big departure from our original design, which is an outward indicator of the improved performance level. The heatsink is the heaviest we have ever made, has the most surface area and is finished in a striking titanium color. These amplifiers look as good as they sound and once you hold one in your hands the build quality is obvious. The icing on the cake is the redesigned remote control with temperature, voltage and clipping indicators, allowing you to easily monitor the vitals of your precious audio system.
• Digital 4-channel full-range amplifier
• Double-sided epoxy circuit board with through holes
• Multi-way protection circuit (thermal / voltage / speaker short circuit / DC offset)
• Voltage, temperature and overload indicator Wired remote control (optional / not included with multi-channel devices)
• clipping indicator on the amplifier side panel
• Optimized for standard 12 V charging systems (Low Voltage Technology)

• Input sensitivity: 6V - 0.2V
• 1400 x 2 @ 4 Ohm RMS
• 700 x 4 @ 2 Ohm RMS
• 500 x 4 @ 4 Ohm RMS
• 2 OHM stereo stable / 4 OHM bridged stable
• Variable subsonic crossover filter: 10HZ - 500HZ
• Variable high pass filter: 50HZ - 500HZ ( 500HZ - 5KHZ at x10 )
• Variable low-pass filter: 50HZ - 500HZ (500Hz - 5KHZ at x10)
• X1, X10 crossover multiply
• Efficiency: 75% 4OHM, at 100HZ
• Signal-to-noise ratio: 105DB <
• Damping factor : 400 <
• Frequency response: 10 Hz - 25 kHz
• 12DB/ OCT Variable crossover slope (HPF/LPF)
• 12DB/ OCT Variable slope of the subsonic crossover
• Tested Voltage & THD : 12.8V & less than 1% THD
• Operating voltage: DC 9V - 15.5V input voltage
• Recommended fuse: 300 amps
• Dimensions:  37.8 cm  L x 17.3 cm W x 6.6 cm H