The Sundown Audio U-Series v.2 is a 12-inch subwoofer with a standard suspension and a 2000-watt RMS power rating. The rating is up from 1500 watts on the previous version. The motor is 15% stronger, and the voice coil construction and airflow have been improved. It has a 4 ohm dual voice coil and is optimized for small ported or bandpass enclosures.
The motor uses a double-stacked, 9.44-inch wide Y35 ferrite magnet system with a one-piece bumped T-yoke and a 0.6-inch thick top plate. A 5mm aluminum shorting ring inside the magnets reduces static inductance and levels out inductance over stroke. A pole-cap aluminum shorting ring doubles as a heat sink and airflow guide, and a 0.6-inch pole extension keeps the coil controlled at high excursion.
The former is stronger than the one in the v.1. A solid pole with machined channels, 16 rear air-gap vents and cast aluminum vent rings between the frame and top plate move air over the coil to keep it cooler. The frame is a new cast aluminum design with stiffening and heat-dissipation ribs. The surround is double stitched, and the tinsel leads are stitched-on double-XL. The spring-loaded terminals accept up to 8 gauge wire.
- Size
- 12"
- Power
- 2000 W RMS
- Impedance
- 4 ohm dual voice coil
- Magnet
- Double-stacked Y35 ferrite, 9.44" wide
- Top plate
- 0.6" thick
- Frame
- Cast aluminum with stiffening and heat-dissipation ribs
- Surround
- Double stitched, with cast aluminum bolt-on rings
- Cooling
- Solid pole with vent channels, aluminum shorting ring cap, 16 rear air-gap vents, vented frame spacer ring, top-plate cooling channels
- Terminals
- Spring-loaded, accept up to 8 gauge