10 December 2022

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

mini hifi

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.

mini hifi

mini hifi

mini hifi

mini hifi

mini hifi

mini hifi

mini hifi

mini hifi




03 December 2022

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

hifi system

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.

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system

hifi system