been to the pier yest and this is what i saw:
diatone DS 261 (1976 model)
3 ways acoustic air suspension system bookshelf type.
¥38,000
3 way speakers which are sold the DS series 8th as feature. DS - 251, 251MK? It was sold, as the model which is succeeded 25 cm woofers, to 5cm as for the constitution, eater and the plus super to eater while it was the そ, unit was developed new, the die-cast frame was adopted for all unit. Also the トゥイー tar had become dome type of 1. 6cm aperture. The enclosure assistant was strengthened strongly with V type reinforcement bridge and the like of new structure, had changed in modern stylish ones. (babel fish translation)
technics:
sb-x3the picture shows however that The mid-toner is modified with an unfinished wooden phase plug, which improved the sound actually. (more open)... not mine ha, just the pic.
its 70 watts, @ 6 ohms, 91bd, year: 1978
sb-45001978, Vented enclosure, 10" woofer, 2.5" cone (tweeter type), 40-20 hz to khz Anechoic Frequency Response, 6 ohms, 14x13x25 dimension, 32 net weight, 300.00 pr. msrp (usd)
Aurex SS 470 and speaker with a solid metal front panel!
and an Akai.