Audio Database


a price -- unknown

It is the large-sized voice monitor system which built the amplifier of the all transistor system into the high fidelity speaker of "3 Way system" which combined the speaker for with an aperture of 12cm developed newly inside sound, and the speaker for low-pitched sound with an aperture of 40cm.

It completed by technical cooperation with the NHK synthesis technical research center like AS-4001 in 1966 (Showa 41).

Every set is adjusted completely in the anechoic room.

Since it is developed as an object for stereos, it is symmetrical unit arrangement.

It is designed supposing using it as a large audition room and music-related recording monitor speaker, and an audition speaker.

The tip of the input cord makes 21P3B of BTS-4101 the standard.

Rating of a mode
System 3 ways, 5 speaker bass-reflex system, and a floor type
Composition, such as a unit For low-pass: 40cm corn type (PW-4011B) x1
For inside regions: 12cm corn type (PM-1201) x2
For high regions: 5cm corn type (TW-25S) x2
Network: NT-3402x1
amplifier: -- MA -402 type all transistor type amplifier x1
Caster: MC-1470 type
Play frequency band 40Hz-15000Hz±5dB
Input level -22dBm
Input impedance 600 ohms, 10kohm (balance)
Crossover frequency 300Hz, 3000Hz
Maximum-except-take-off sound pressure level 111dB/m
-less distorted maximum-except-take-off sound pressure level 109dB/m
Power source AC100V, 110VA
Dimensions Only a main part is the :width 850x height 1278x depth of 520mm.
Caster included: Width 1113x height 1428x depth of 520mm
Weight 160kg