This is DIATONE. 2S-305(R305）was released as a NHK monitor speaker in 1958. This speaker is 2way bass reflex type. It mounts 30cm woofer and 5cm tweeter. frequency range is 50～15000Hz, input max 60watts. It is good in vocal especially Japanese Enka. We have a pair of 2S-305(R305）which was produced in October 1969. We arranged it with marantz CD-34, SANSUI AU-111 I recommend it all of you who likes Enka.