HOP -- (Highly Oriented Polyolefine) A proprietary Sony speaker cone material which combines high strength, low weight, and low resonance resulting in improved transient response, higher power handling, and flatter frequency response.
Aluminum Die-cast frame -- A speaker basket constructed from aluminum (for strength & high damping) using casting production techniques.
Crossover -- A component or circuit used to divide the audio signal into specific frequency bands.
Sensitivity -- 90 dB/W/m
Frequency Response -- 28 - 28,000 Hz
Mounting Dimensions -- 8-3/4" x 6" x 3-1/2" (w/h/d)