YAMAHA JA-3870

Commentary

38 cm cone-shaped woofer designed with low fo and low distortion factor as the theme.

Alnico magnet is used for the magnetic circuit.

It is designed for use in a bass reflex enclosure of approximately 150L to 200L.

Model Rating

Type	38 cm Cone Woofer
Nominal impedance	8 Ω
Playback frequency band	20 Hz to 2 kHz
Recommended bandwidth	20 Hz to 800 Hz
Rated input	100W
Max Input	200W
Output sound pressure level	95dB/W · m
Voice coil diameter	100 φ mm
Equivalent mass	137g
Qo	0.26
fo	19.5Hz
Magnet	Alnico, 1.5 kg
Magnetic flux density	12,500gauss
Total flux	275,000maxwell
Recommended box capacity	150L ~ 200L
External dimensions	Diameter 390 mm x Height 168.5 mm
Weight	11.1kg