Lo-D L-203

Commentary

A 20 cm cone type woofer equipped with a low distortion magnetic circuit (Lo-D Actuator) in addition to a ギャザードエッジ.

A ギャザードエッジ is used at the edge part to lower resonance frequencies and greatly improve the mechanical straightness of piston motion.

Lo-D Actuator is used for the magnetic circuit.
The Lo-D Actuator uses an aluminum short ring and a copper short cap to control the current flowing through the voice coil, greatly reducing the second and third harmonic distortion. As a result, the distortion rate in the mid-frequency range reaches approximately 0.3% at an input power of 1W.

Aluminum is used for the bobbin of the voice coil to improve input resistance.
In addition, a long travel type with a voice coil wound widely is adopted in order to withstand large amplitude and realize low distortion.

Special latex is applied on the back side of the cone paper to suppress the split vibration of the cone.

Model Rating

Type	Cone type woofer unit
Outer Diameter	23.0cm
Aperture diameter	17.7cm
Baffle hole	18.3cm
Rated input	20W (60 Hz or more continuous)
Output sound pressure level	89.5dB/W/m
Voice coil impedance	8 Ω
Playback frequency band	30 Hz ~ 3.5 kHz
fo	27Hz
Crossover frequency	3.5 kHz or less
Total flux	120,000maxwell
Magnetic flux density	9,100gauss
Depth	10.2cm
Weight	2.5kg