Just found some specifications of the Hitachi 8600RM
SPECIFICATIONS
POWER SUPPLY: AC: 100V 50/60 HZ
DC: 12V-15V ["C" SUM-1(G) X 10 OR EQUIVALENT CAR: USE 12V CAR BATTERY ADAPTOR
SPEAKERS 2-WAY: 16CM X 2, 2X5 CM
OUTPUT: 2X15 W RMS (AC OPERATION)
DIMENSIONS: 340(H) 13.3858268†X 564(W) 22.2047244â€X 1776.96850394†(D) MM
WEIGHTS: 8.5KG (WITH BATTERIES)
RADIO SECTIONS
CIRCUIT SYSTEM:
FM/AW 2-BAND SUPERHETERODYNE
FM 76-108 MHZ
AM 530- 1605 KHZ