Audio Database


80,000yen(It is one price. Around 1970 )

AS-4001, the 40cm corn type Woofer unit adopted as the AS-4021 grade.
As an object for high fidelity large-sized speaker systems, it is especially developed by the speaker for low-pitched sound with a large-less distorted maximum-except-take-off sound pressure level.

The difference from PW-4011 and PW-4011B is only impedance.

Rating of a mode
System Corn type Woofer unit
Aperture 40cm
Impedance PW-4011: 32ohm
PW-4011B: 8ohms
Rated input 40W
Low-pass resonance frequency 30Hz
Play frequency band 30Hz - 1000Hz
Output sound pressure level 102 dB/VA (with 50cm)
Effective oscillating radius 17.6cm
Equivalent mass of a vibration system 130gr
Equivalent Qo of a vibration system 0.4
Voice coil diameter 13cmphi
Magnetic flux density 7000gauss
The total magnetic flux 90x104maxwells
Permanent magnet 140phix95phix50
The diameter of baffle opening 401mm
Dimension Diameter 450x depth of 200mm
Weight 25kg