18 Inch 1500W Bass-mid (AC470Y-B3s-4)

The AC470Y-B3s is an Australian made professional low frequency 18″ bass loudspeaker with a useful upper limit of 2.8kHz. This model has been designed for peak linear travel of 7.5mm and capable of 21mm peak before damage. The 1500W program rating is achieved with through magnet cooling, thermal coupling to a massive die-cast aluminium frame and use of high temperature rated materials.

This model has a sensitivity of 97.5 dBSPL. The stiff ribbed cone is product of our OFP technology and is moulded in-house from a blend of premium air-dried wood pulp and Kevlar fibres resulting in smooth controlled mid response.

The AC470Y features die-cast aluminium frame, CNC precision components. The ferrite magnet-assembly is FE optimized. The bumped rear-plate permit large linear voice coil excursions, and the shaped pole improves BL linearity. The aluminium shorting ring lowers distortion improves stability and enhances heat dissipation from the voice-coil. Wind noise is reduced with an undercut and flared vented pole-piece.

The spider is made of aramid material chosen for its high rigidity and long-term stability in demanding applications. The treated accordion cloth surround assures extreme levels with excellent linearity.

Specifications

• Nominal diameter: 18″,470mm
• Program rating: 1500W
• AES rating: 750W
• Nominal impedance: 4 ohm
• Sensitivity: 97.5 dB
• Frequency range: 30-2800Hz
• Resonance frequency: 42Hz
• Magnet: High grade Ceramic
• Mechanical Qm: 5.9
• Electrical Qe: 0.40
• Total Speaker Qt: 0.375
• Compliance Vas: 179 litres
• Peak linear Xpk: 7.5 mm
• Speaker Weight: 12.8 kgm

Downloads

• AC470Y-B3s-4  Datasheet