Pioneer PW-A31

Commentary

A series 30 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.

A magnetic circuit using a large ferrite magnet is adopted, and a long voice coil with good magnetic efficiency and uniform magnetic flux even at large amplitude is adopted for the voice coil.
In addition, the pole piece of the magnetic circuit is equipped with a pure copper cap to suppress harmonic distortion.

Model Rating

Type	30 cm Cone Woofer
Impedance	8 Ω
Lowest resonance frequency (fo)	20Hz
Reproduction frequency characteristic	Fo ~ 3 kHz
Max Input	80W
Rated input	40W
Output sound pressure level	93dB/W/m
Crossover frequency	3 kHz or less
Qo	0.27
Total flux	178,000maxwell
Magnetic flux density	10,700gauss
Equivalent mass	57gr
Baffle opening	270 φ mm or 310 φ mm
External dimensions	Diameter 340x Depth 156.5 mm
Weight	6.7kg