Sundown Audio - HZS 12”

Sundown Audio HZS Series Subwoofers
Purpose-Built for Tight Installs. Powered by Real Performance.

The Sundown Audio HZS Series was engineered from the ground up to bring powerful, clean bass to space-limited installations—without sacrificing output, reliability, or thermal performance. Whether you’re working with a slim enclosure behind a truck seat, under a rear deck, or in a stealth build, the HZS delivers the kind of low-end impact you expect from Sundown.

Available in 10" and 12" sizes, the HZS is a shallow-mount subwoofer rated for 600 watts RMS and designed to thrive in ported enclosures, though sealed options are also supported. Each model features a 2.5" black aluminum voice coil, a high-roll surround, a progressive spider, and a vented motor design that keeps things cool when the music gets loud.

Built for daily abuse and engineered for clean excursion, the HZS combines strength, efficiency, and low-profile fitment into one aggressive package. It’s the ideal solution when you want true bass performance without giving up precious install depth.

Key Features:

• RMS Power: 600W
• Voice Coil: 2.5" black aluminum former - Dual 4Ω
• Cooling: Vented motor gap and solid pole piece
• Suspension: High-roll surround and progressive spider
• Lead Wires: Stitched mini-XL tinsel leads for long-term durability
• Motor Assembly: Bolt-through design for mechanical strength
• Mounting Depth: Compact profile for shallow, space-restricted enclosures
• Best Use: Ported enclosures for optimal output; sealed compatible

  RE (Ohms)	6.850
  FS (Hz)	32.802
  VAS (L)	56.708
  Qes	0.564
  Qms	3.240
  Qts	0.480
  BL (NA)	21.348
  Mms (Grams)	182.051
  Cms (mm/N)	129.313
  Sens (dB @ 1w/1m)	87.4
  Xmax
  T/S SPECS	HZS 12"

  • Ported Enclosure
    • Size: N/A
    • Port Area: N/A
    • Port Tuning: N/A
  • Sealed Enclosure
    • Size: 1.0 cuft net
  • Displacement: 0.05 cuft. 
  • Depth:  4.3"
  • Outside Diameter: 12.5"
  • Cutout: 11.2"

  Physical Dimensions