it works for me Double stacked 1" tall ferrite magnets
• 150oz motor structure
• Effective motor force of 52.5 Newtons2 per watt (BL2/Re)
• 2" diameter, 1.8" winding height, 4-layer aluminum wire voice coil
• xmax of 20mm (one way linear travel)
• Single poly-cotton linear role spider with intergraded woven leads
• Stamped steal frame with added clearance for excursion capabilities
• Single 3.3Ω (4Ω nom.) vc
• 400 watts sustained (1000 watts dynamic)
• High quality thermal flexible epoxies to ensure longevity
• Rigid lightweight pulp composite fiber cone with inverted dust cap
• Vented flared pole piece
• FEA optimized NBR half roll surround allows for linear travel and high excursion
• Dressed in a rubber magnet boot and gasket