Audio Database


Lo-D HS-55
59,000yen(one-set, around the 1979 time)

The 2 way speaker system which carries a large-sized Woofer and a horn tweeter aiming at reservation of a wide dynamic range.

The 30cm cone type Woofer is carried in low-pass.
High region resonance frequency is raised because a cone part attaches a deep corrugation, and the 140phi magnet and the Lo-D actuator (low-distortion magnetic circuit) are carried in the magnetic circuit.

The horn type tweeter which carries an acoustic lens is carried in the high region.
The 235mm exponential horn over which enough acoustic loads are covered over the whole band carries the acoustic lens which is a product made from aluminum die-casting, and suppresses an unnecessary oscillation to an opening, and is improving dispersibility.
A 3.5cm titanium dome is carried in a diaphragm, and the 90mmphi magnet is carried in the magnetic circuit.

The three-layer structure particle board is used for a baffle board and a back board.

The succession variable level control is carried in high regions.

Rating of a mode
Scheme 2 ways, 2 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc. For low-pass: 30cm cone type
For high regions: Horn type
Frequency characteristic 40Hz - 20000Hz (-15dB anechoic chamber)
The maximum input 200W (music signal peek)
Impedance 8ohms
Output sound pressure level 94dB/W/m
Maximum output sound pressure level 117dB/m
Cross over frequency 1.5kHz
Enclosure internal volume 62L
Dimensions Width 370x height 665x depth of 410mm
Weight 24.5kg