Sundown Audio NS-18 V.3 D1 18" 2500W RMS Dual 1-Ohm Nightshade V3 Series Subwoofer

The Sundown Nightshade v.3 (commonly known as NS v.3): The third generation of our world famous Nightshade line. The Nightshade woofers are assembled in the USA with only the best high strength adhesives and materials. Each one is hand built right here in Claremont, North Carolina by our experienced and dedicated build staff.

The Nightshade v.3 line features the same patented frames as the X and Z v.4 series woofers. The stock suspension configuration also provides the same low distortion / extreme low frequency output that you expect from our new platform drivers.

Product Features:

• Interlocked shorting ring into back and top plates from Z v.3 / v.4 – prevents any slipping or shifting of the back and top plates as well as the ring itself.
• Improved version of the ventilation system from the NS v.2
• Hyper-extended pole piece developed for the X and Z v.4 which increases linear throw and prevents damage to the coil when paired with the new suspension platforms.
• The NS v.3 features the longest coil of any speaker we have made to date in it's stock format. We leveraged the advantage of the huge motor of the NS v.3 (quad stack 250mm magnets) so we could take advantage of a 4-layer coil – the 4-layer coil keeps the mass and inductance down while allowing us to use such a long coil – and the huge motor allows us to still achieve the level of BL we desired.
• The sleeve system: This is something ALL new that nobody has done before. Every NS v.3 starts out with a HUGE gap before being “sleeved out” as we call it.
• The first part of the sleeve system is the “pole sleeve” – we currently offer 4 versions of this sleeve and this one is permanent and epoxied into place with a high temperature 3M epoxy. We offer two thicknesses of aluminum and two thicknesses of steel sleeves; the aluminum sleeves are for decreased inductance and the steel are for maximum BL. The “stock” sleeve is the thinner of the two steel sleeves.
• The second part of the sleeve system is the “gap OD sleeve” – we currently offer 5 different version of this sleeve or the motor can be left “open” for the fattest coil option for a full 92.5mm gap (so six total options). This sleeve CAN be removed and changed later – as long as the motor is shipped into us to be demagnetized. The “stock” sleeve is for an 85.2mm gap OD – we have various other sleeves to allow the use of ANY other 3” coil we have offered in the past. We can use NS v.1, v.2, Z v.2, Z v.3, Z v.4, or X coils in the motor with the right sleeve. We can also develop any other type of coil we want in the future.

• Sealed: N/A
• Ported: 7.00 ft^3
• Displacement: 0.27 ft^3
• Depth: 12.625"
• Outside Diameter: 18.42"
• Cut-Out: 16.69"
• Recommended Tuning: 32Hz
• Recommended Port Area: 112 in^2