Pioneer PW-A21

Commentary

A series 20 cm cone shaped woofer.

The cone paper is made of carefully selected fiber material with high Young's modulus and moderate internal loss.
In addition, high compliance type roll edge is adopted for the edge.

Magnetic circuit using large ferrite magnet is adopted.
The voice coil uses a long voice coil with high magnetic efficiency and uniform magnetic flux even at large amplitude.

Model Rating

Type	20 cm Cone Woofer
Impedance	8 Ω
Lowest resonance frequency (fo)	30Hz
Reproduction frequency characteristic	Fo ~ 4 kHz
Max Input	40W
Rated input	20W
Output sound pressure level	91dB/W/m
Crossover frequency	4 kHz or less
Qo	0.35
Total flux	81,000maxwell
Magnetic flux density	8,700gauss
Equivalent mass	22gr
Baffle opening	172 φ mm or 211 φ mm
External dimensions	Diameter 234x115mm
Weight	2.7kg