OTOMON Laboratory　(音門ラボ)/Product details page

Extra rare Maxonic horn, manufactured in 70s year with TAD TD-4001 driver, beryllium diaphragm, extra rare . Horn 's weight is about 25kg / each, very very heavy so shipping fee is very expensive.

Both driver has DCR value 7.5ohm

A typical high-frequency driver unit of TAD (Technical Audio Devices), which is also used in the Exclusive model 2401 twin and model 2402.

600Hz by adopting a large beryllium diaphragm with an outer diameter of 116mm integrated with the edge while being lightweight, a magnetic circuit with an alnico magnet with a magnetic flux density of 20,000 gauss, and a 5-slit phasing plug designed in consideration of fluid dynamics. Achieves wideband reproduction of ~ 20kHz and high efficiency.
In particular, the conversion efficiency in the high frequency range of 10kHz or higher surpasses that of a small screwdriver and realizes excellent energy characteristics.

High durability and excellent linearity are achieved by improving heat dissipation through a large-diameter voice coil with a diameter of 101 mm and high-precision placement of each part.

Voice coil impedance 16Ω
Voice coil caliber 101mm
Facing plug 5-fold slit rear type
Playback frequency band 600Hz-20kHz
Maximum input 60W (600Hz, -12dB / oct)
Output sound pressure level 110dB / W / m
Crossover frequency 600Hz or higher (cutoff characteristic 12dB / oct or higher)
Total magnetic flux 228,000 maxwell
Magnetic flux density 20,000 gauss
Throat connection hole diameter 49.2mm
Mounting dimensions 101.6 mm (4 hole type)
External dimensions Diameter φ178 x Depth 155.5 mm
Weight 12.6kg

It can be used in 2, 3, 4, 5 ways system.