Audio Database
SD-4000
Commentary

Network by LC division method.

SD-4000 is for 2-way use, and SD-4300A / SD-4300B / SD-4500 / SD-4600 is for 3-way use.

Air-core coil using 1.2 φ enamel wire is adopted for SD-4000, SD-4300A, SD-4500 and SD-4600.
In addition, an air core coil using a 1.5 φ enamel wire is adopted for SD 4300 b.

A MP capacitor is used.

There are two types of cutoff characteristics, 12 dB and 6 dB, and they are manufactured while measuring each unit.

Model Rating
Type LC type network
Model Name SD-4000 SD-4300A SD-4300B SD-4500 SD-4600
Use 2way 3way
Crossover frequency 4kHz 300 Hz, 4 kHz 500 Hz, 4 kHz 600 Hz, 4 kHz
Attenuation 12dB/oct
Coil used 1.2 φ Copper Air Core Coil 1.5 φ Copper Air Core Coil 1.2 φ Copper Air Core Coil