





Sundown Audio SALT-500.4 4-Channel Amplifier
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
Subwoofer Wiring Diagram
Select your configuration to view possible wiring combinations.
Loading wiring diagrams…
Diagrams are on our wiring diagram page.
- Power — 500W x 4 @ 4Ω, 700W x 4 @ 2Ω, 1,400W x 2 @ 4Ω bridged
- Class — Class-D, 4-channel full-range (10Hz–25kHz)
- Filters — Variable 12dB high/low-pass (50Hz–500Hz), subsonic (10Hz–500Hz)
- Crossover — X1/X10 crossover multiplier
- Protection — Thermal, voltage, speaker short, DC-offset
This Listing Includes: (1) Sundown Audio SALT-500.4 4-Channel Amplifier
The SALT-500.4 is a 4-channel full-range Class-D amplifier delivering 500 watts x 4 at 4 ohms, 700 watts x 4 at 2 ohms, or 1,400 watts x 2 at 4 ohms bridged across a 10Hz–25kHz response. SALT — Sundown Audio Low-Voltage Technology — produces optimum power at realistic voltages in the 12s rather than needing 14+ volts. Variable 12dB high and low-pass filters (50Hz–500Hz), a variable 12dB subsonic filter (10Hz–500Hz), and an X1/X10 crossover multiplier dial in the sound, while onboard power, clipping, and protection indicators plus thermal, voltage, speaker-short, and DC-offset circuitry keep it safe. An optional wired remote displays voltage, temperature, and clipping. Authorized Sundown Audio dealer at JS Ultimate Sounds. Free shipping on orders $99+.
Features
- 4-channel full-range Class-D amplifier, 10Hz–25kHz
- Variable 12dB high and low-pass filters: 50Hz–500Hz
- Variable 12dB subsonic filter: 10Hz–500Hz
- X1/X10 crossover multiplier with power, clipping and protection indicators
- Optional wired remote displays voltage, temperature, and clipping
Specifications
| RMS @ 4Ω | 500W x 4 |
| RMS @ 2Ω | 700W x 4 |
| RMS @ 4Ω Bridged | 1,400W x 2 |
| Class | D |
| Frequency Response | 10Hz–25kHz |
| High/Low-Pass Filters | 50Hz–500Hz (12dB) |
| Subsonic Filter | 10Hz–500Hz (12dB) |
| Crossover Multiplier | X1/X10 |
| Protection | Thermal, voltage, speaker short, DC-offset |


