Panasonic RX-DT7 (1990)

Japan TV advert

Lo-D Jewel Jr. (1979) - Aka. Hitachi ACT-M2

In 1979 Lo-D (brand name used by Hitachi on Japanese market) introduced a series of mini Hi-Fi components named Jewel. The model presented here was sold on the Japanese market as Lo-D Jewel Jr. while the same component was sold worldwide (slightly upgraded) as Hitachi ACT-M2. The basic system consisted of the HSR-M1 (15W/ch tuner-amplifier), D-M1 cassette deck (30-15000 Hz FeCr tape) and HS-M1 (2-way speaker system, 12cm woofer, 5cm tweeter). These components can be operated from mains or a 12V car battery. Various placement of the components was possible, either as standalone components or on dedicated racks such as the LA-M1 or the LA-M1P. For transportation, the LA-M1C(B) suitcase was available in both sillver and black finish, with or without storage compartiment. For a complete mini home Hi-Fi system, a series of additional components were available. These were the HT-10FM (FM "wireless"!!! turntable), HT-6M (turntable for the Hitachi version), C13-300 TV set, TTM-M1 TV tuner, ET-250 timer unit and various microphones and headphones.

More Classic Mini

harman/kardon 700 Series (1980) - High Technology Components

These midi-sized slim-line Hi-Fi components were built around the Ultrawideband, negative feedback design amplifier technology (U.S. Patent#4,176,323) promoted by harman/kardon. With amplifiers designed by Dr. Matti Otala this system had the following components:

BASIC SET:

hk710 - analog tuner, phase locked

hk750 - integrated amplifier, 45W/ch

hk740 - stereo receiver, 30W/ch, analog tuner

HIGH TECHNOLOGY:

hk715 - digital tuner, 8 presets

hk725 - preamplifier, push-button tone control for cleanest sound

hk770 - stereo power amplifier, twin power supply, 65W/ch

hk775 - mono power amplifier, toroidal power transformer, 130W 

EXTRA COMPONENTS:

hk705 - cassette deck, 20-19,000Hz (Metal), Dolby HX headroom extension

hk720 - turntable, 2-speed, semi-automatic, belt drive

EQ700P - graphic equalizer, 2x10 band

These beautifully designed components all have the same size: 385x72.5x320mm.

Components from this system were also featured in the movie American Psycho.

These components were actually built by Shin-Shirasuna Electric Corporation of Japan who also sold these components under their brand name SILVER as the Series 5000 components.