The basic design of the loudspeaker hasn't changed much in the past 50 years. On the contrary, many materials incorporated in loudspeaker design have improved dramatically. Back in the 50s and 60s, Alnico was the most common magnet used in loudspeakers. However, a shortage in materials and increased costs for Alnico during that time precipitated a shift to the widespread use of the ceramic magnets most of us are familiar with today.

Eminence Neodymium LA8-CNMBA Speaker, 225 W RMS, 450 W PMPO Upgrade the car's audio performance with Eminence LA8-CNMBA speaker Experience body shaking levels without any room-vibrating reverb or excessive heat output with 225 W RMS power Hear low notes and soaring vocals with a frequency range of sound from 82 Hz-3.20 kHz 8 Ohm impedance extracts maximum power so that you get more from your speakers