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🔥 HOT DEAL Sundown Audio SDX-400.1 Mono Class D Amplifier, 400W x 1 RMS, Weatherproof 1-Ohm
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Sundown Audio

Sundown Audio SDX-400.1 Mono Class D Amplifier, 400W x 1 RMS, Weatherproof 1-Ohm

✅ In stock ⭐ Lowest price we've tracked 📉 Price recently dropped
B
Grade
👍 Good Deal
63.06/100
Current Price
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
$89.95
Listed $89.95
Analysis Confidence 90%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 15, 2026 7:22 PM · Prices & availability subject to change

Is This a Good Price on Amazon?

👍 Good Deal
  • 👍Verdict: Good Deal. Solid value. Price is noticeably below the recent average.
  • 💰The current price is 43% below what this product typically costs — a notable saving over its usual going rate.
  • 📉Our analysis places this at the most competitive price point we have ever tracked for this product — an exceptional moment to buy.
  • ➡️Pricing has held fairly steady, with no strong push in either direction.

How We Scored This Deal

Price Competitiveness 28/28
Recent Value 0.58/22
Market Standing 10.48/20
Deal Strength 20/20
Momentum 4/10

📝 Product Overview

🏪 Sold by Audiosavings
📦 Fulfillment Fulfilled by Amazon
🚚 Shipping Free Shipping

Product Details

✓Weatherproof Mono Design: The SDX-400.1 Class D amplifier suits car, UTV, powersports, and open-air vehicle audio systems, with a water-resistant build for changing conditions
✓1-Ohm RMS Power: Delivers 400 x 1 at 1 ohm RMS, 300 x 1 at 2 ohms RMS, and 175 x 1 at 4 ohms RMS for compact mono subwoofer setups
✓Bass Tuning Control: Variable low-pass filter from 50Hz to 250Hz and variable 12dB bass boost help shape low-frequency output for subwoofer systems
✓Protected Control Layout: A removable audio control cover keeps settings covered, with DC auto-sensing turn on, wired remote, and thermal, voltage, speaker short, and DC-offset protection
✓Compact Aluminum Housing: Heavy cast aluminum heat sink supports heat control, while 11.5V to 15V operation, 40A fuse, 90dB S/N ratio, and 5.75 x 4 x 2.125 in size fit tight builds

⚙️ Specifications

Manufacturer
Sundown Audio
Mounting Type
Freestanding
Brand
Sundown Audio
Specification Met
CE, FCC
Material
Aluminum
Global Trade Identification Number
00810111130516
UPC
810111130516
ASIN
B0FDH7SVLZ
Date First Available
March 15, 2025
Brand Name
Sundown Audio
Part Number
A-SDX400
B
$89.95
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