• Country
• Germany

• Manufacturer / Brand
• Heco, Hennel & Co. KG; Schmitten, Pulheim (auch Berlin)

• Year
• 1973–1977

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 200378

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• 3 Loudspeakers

• from Radiomuseum.org
• Model: SM-640 - Heco, Hennel & Co. KG;

• Notes
• Technische Daten • Bauart: 3-Weg, geschlossen • Chassis: o Tieftöner: 250 mm Konus o Mitteltöner: 38 mm Kalotte o Hochtöner: 25 mm Kalotte • Belastbarkeit (Nenn/Musik): 40/50 Watt • Frequenzgang: 30 - 25.000 Hz • Übergangsbereiche: 800/3000 Hz • Impedanz: 4 Ohm

• Net weight (2.2 lb = 1 kg)
• 6.9 kg / 15 lb 3.2 oz (15.198 lb)

• Price in first year of sale
• 298.00 DM

• Source of data
• - - Data from my own collection

• Author
• Model page created by Uwe Becker. See "Data change" for further contributors.

• Other Models

• Here you find 137 models, 135 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Heco, Hennel & Co. KG; Schmitten, Pulheim (auch Berlin)