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The Sundown Audio SLD-10 D4 is a 10″ shallow-mount subwoofer designed for high-output systems where space is limited. Despite its compact depth, it delivers solid performance with dual 4-ohm voice coils, allowing flexible wiring options. Its rugged motor structure and quality components make it reliable and efficient for both sealed and ported enclosures.

Key Benefits

• 600 W RMS power handling — gives consistent bass power without overspending on overkill.
• Very shallow mounting depth (4.9″) — ideal for tight spaces or under-seat installations.
• Strong motor and cooling — dual magnet structure + venting for better thermal management and longevity.
• Durable lead wires — “Mini-XL” stitched tinsel leads prevent fatigue under heavy excursion.

Technical Specifications

• Nominal Size: 10″
• RMS Power Handling: 600 W
• Peak Power: ~1,200 W (per Sundown's spec sheet)
• Impedance (per coil): Dual 4 Ω
• Voice Coil: 2.5″ high-temperature aluminum former
• Sensitivity: 85.4 dB (1 W / 1 m)
• Xmax (one-way): 12 mm
• Free-air Resonance (Fs): 46.817 Hz
• Equivalent Compliance (Vas): 12.091 L
• Qts / Qes / Qms: 0.440 / 0.547 / 2.246
• BL Factor: ~24.492 N·A (per spec sheet)
• Subwoofer
• Recommended Enclosure Volume:
• Sealed: 0.5 cu ft
• Ported: 1.0 cu ft tuned to ~35 Hz

Installation & Compatibility

Mounting is shallow — only requires 4.9″ of depth for top-mount installation, making it great for tight or under-seat enclosures.

Dual 4-ohm coils provide flexibility: you can wire them in parallel, series, or other configurations depending on your amp.

Recommended port tuning: 35 Hz for ported builds.

For optimal performance, use heavy gauge wiring and ensure your amp can safely deliver ~600 W RMS per sub.

FAQS

• Does the Sundown SLD 10 perform well in small sealed enclosures?
  Yes, the SLD 10 is engineered for tight, accurate bass in compact sealed boxes, making it ideal for limited-space builds.
• How much power does the Sundown SLD 10 require for optimal performance?
  It typically performs best with 400–600 watts RMS, depending on your tuning and enclosure design.
• Is the Sundown SLD 10 suitable for daily street setups?
  Absolutely—it's designed for clean, low-distortion bass that stays consistent during daily use without overheating.
• Can the Sundown SLD 10 work in a ported enclosure?
  Yes, although it shines in sealed boxes, many users run it ported for increased output and deeper low-end.