Technics EAS-46PL80NA/NB

Commentary

46 cm cone type woofer unit.

The difference between EAS-46PL80NA and EAS-46PL80NB is that the V. C impedance is 8 Ω for NA and 16 Ω for NB.

The voice coil is made of 0.4 mm φ high heat-resistant copper wire and is designed to withstand 80W sinusoidal wave input. In addition, the voice coil winding width is more than twice the plate width (12 mm) in order to eliminate distortion due to amplitude. The voice coil is designed not to fly out of the magnetic field even when a large input is applied in the low frequency range.

The strain caused by the diaphragm is eliminated by increasing the Young's modulus by making the diaphragm itself very thick.
In addition, a newly developed Cross Edge is coated with a stable viscoelastic resin in order to suppress the distortion caused by the edge. In addition, the damper is shaped to withstand large amplitude and has good linearity over a wide range.

The vibration system mass is 160g, and fo = 15 Hz is realized by the support system with large compliance.

The magnetic circuit uses a huge magnet with a total weight of 4.1 kg that combines 30 NKS-5DG (30 Φ x25mm) magnets, and the total magnetic flux reaches 840,000 maxwell.

Model Rating

Type	46 cm Cone Woofer
Allowable input	80W
V. C impedance	8 Ω (EAS-46PL80NA) 16 Ω (EAS-46PL80NB)
Playback frequency	Fo to 1 kHz
Lowest resonance frequency	10 Hz to 20 Hz
Output sound pressure level	97dB
Qo	0.35
Magnetic flux density	11,800gauss
Total flux	840,000maxwell
Estimated volume	14.7L
Cone effective diameter	390mm
Weight	19kg