1-4 DAYS DELIVERY
sundown audio SDX-400.1 (SDX series) Amplifier
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100% ORIGINAL AND QUALITY
24 MONTHS GUARANTEE
- Description
- Shipping and Refund
- Reviews
sundown audio SDX-400.1 (SDX series) Amplifier
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!

Features
- Digital Class-D Mono Block Amplifier
- Dual MOS-FET PWM Power Supply
- 1 Ohm Stable Load
- 12 dB/Octave - Variable Low Pass Filter
- DC Auto sense feature
- 0 to 12dB - Variable Bass Boost
- 4 Way Protection Circuit (Thermal, Voltage Speaker short and DC Offset)
- Wired Remote Control

Specifications
- 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
30-Day Return Policy
At Fuego Bass Shop, we want you to be fully satisfied with your purchase. You can return most products within 30 days of delivery for a refund or exchange.
Please note: Any returns with physical damage or missing original packaging may incur a deduction.
Restocking Fee: A 15% restocking fee will be deducted from your refund to cover handling and restocking.
Refunds will be processed to your original payment method within 5–7 business days after we receive and inspect the returned item.
We ship within the United States (excludes recipients in Alaska, Hawaii, Puerto Rico, U.S. Virgin Islands, and Guam).
At Fuego Bass Shop, we understand the thrill of receiving your car audio equipment quickly. Our shipping process is designed to ensure your order arrives safe, fast, and ready to pump bass.
Most orders are processed within 1–2 business days. Standard shipping usually takes 3–7 business days depending on your location. Expedited shipping is available for select items during checkout.
Once your order is shipped, you will receive a tracking number via email so you can follow your gear every step of the way. Our packaging is designed to protect high-performance audio equipment from bumps, vibrations, and shocks during transit.
Please note: Delivery times may vary during holidays, promotions, or due to carrier delays. We highly recommend verifying your shipping address before completing checkout to avoid delays.
If you have any questions about your shipment or need assistance, our support team is ready to help. We want your experience with Fuego Bass Shop to be as powerful and smooth as our bass systems!




