Heco Sound-Master SM35, 1978-1971, made in Germany

 

Link: hifi-wiki | radiomuseum

Country: Germany
Manufacturer / Brand: Heco, Hennel & Co. KG; Schmitten, Pulheim (auch Berlin
Year: 1968/1969
Category: Loudspeaker, headphone or earphone
Main principle: none
Wave bands - without
Power type and voltage: No Power needed
Loudspeaker: 3 Loudspeakers
Material: Wooden casefrom
Model: Soundmaster SM35 - Heco, Hennel & Co. KG;

Shape: Book-shelf unit.
Dimensions (WHD): 280 x 480 x 250 mm / 11 x 18.9 x 9.8 inch

Net weight (2.2 lb = 1 kg): 9.7 kg / 21 lb 5.9 oz (21.366 lb)

Specification:
Type: 3-way closed speaker system
- Woofer: cone Ø 245 mm
Diffuser material: celulose with the addition of sheep wool
Suspension material: butyl rubber
- Midrange: cone Ø 130 mm
Diffuser material: pulp with the addition of sheep wool
Suspension material: butyl rubber
- Twitter: oval 70x100 mm
Diffuser material: cellulose
Sine / musical power: 35/50 W
Frequency response: 40–20 000 Hz
Frequency section: 650/1900 Hz
Impedance: 4-8 Ω
Price in first year of sale: 296.00 DM