Dayton Audio - 18" Ultimax Subwoofer - UM18-22

Dayton Audio’s UM18-22 Ultimax 18” DVC driver provides over 2” of peak-to-peak excursion, it sweeps over six litres of air with each stroke.

The subwoofer is designed to excel in either sealed or vented enclosures, it features an ultra-powerful triple stack of high-grade ferrite ceramic magnets for ultra-high force and exceptional control, plus dual aluminium shorting rings above and below the magnetic gap for minimised inductance, “faster”-sounding bass response, and perfect magnetic symmetry. The voice coil diameter has been increased to 3 inches, for even more thermal dissipation area that allows the 18” model to withstand 1000 watts of punishing bass power continuously without thermal fatigue. Dual 2-ohm voice coils allow for stereo 2-ohm operation, or mono operation in 1-ohm or 4-ohm configurations, for true design flexibility.

The huge 18” Nomex honeycomb composite curved cone features woven fiberglass outer skins for the ultimate in rigidity and resistance to damage, while the “tall-boy” rubber surround with integral gasket supports extreme stroke with linearity and durability. Dual 8” spiders are mirror-imaged, to keep the 2” of excursion completely linear and provide cancellation of distortion due to compliance asymmetry, for ultra-low mechanical distortion even at the outer limits of travel.

Features:

• Extra-thick, one-piece Nomex honeycomb covered speaker cone with woven heavy-duty glass-fibre for high strength with high SPL.
• Ultra-powerful triple stacked high-energy magnets.
• "Tall-boy" rubber surround with integral gasket supports extreme stroke with linearity and durability/
• 1000W RMS long-term power handling.
• Over 2" of total cone travel.
• Dual aluminium shorting rings above and below the magnetic gap for minimised inductance.
• Dual 2 ohm, 2-layer copper voice coils.
• Large, vented pole piece and under-spider venting.
• Black anodised aluminium former and pole improves heat dissipation.

Specifications: