Heco SM 640

Data

General

• Manufacturer: Heco
• Model: SM 640
• Type: Loudspeaker
• Years of manufacture: 1973 - 1978
• Made in: Germany
• Color: White, Walnut
• Dimensions: 560 x 280 x 200 mm (HxWxD)
• Weight: 8 kg
• Original price approx.: 398 DM

Technical data

• Type: 3-way, closed
• Chassis:
  • Woofer: 250 mm cone

midrange driver: 38 mm dome tweeter Tweeter: 25 mm dome tweeter

• Power handling (nominal/music): 40/60 Watt
• Efficiency:
• Frequency response: 30 - 25,000 Hz
• Crossover: 800/3000 Hz
• Impedance: 4 Ohm

Special Features

• Front grille made of aluminium

Remarks

• Other models in the same series:
• Heco SM 620
• Heco SM 625
• Heco SM 630
• Heco SM 635
• Heco SM 640

Pictures

• Extract from brochure: Heco SM 635 / 640