Isophone HSB 20/8

Data

General

• Manufacturer: Isophon
• Model: HSB 20/8 (= 20 W / 8 Ohm)
• Years of manufacture: ca. 1965 - 1970
• Made in: Germany
• Colour: walnut veneer
• Dimensions: 620 x 280 x 260 mm (W x H x D)
• Weight: 12,2 kg
• Original price approx.: 320,- DM per piece (1969)

Technical data

• Type: 3-way shelf speakers, closed
• Chassis:
  • Low-midrange: 1 PSL 203 S (203 mm chassis-Ø) ¹.

1 HMS 1318/120 (Oval full range LS, 130x180 mm chassis) ¹ 1 HM 713 (Oval full range LS, chassis 70x130 mm) ¹ power handling (nominal/music): 20/50 Watt efficiency: unknown, but due to AlNiCo magnets and 1st order crossover very high

• frequency response: 40 - 20,000 Hz
• crossover range: 1200 Hz
• Impedance: 8 Ohm

¹ Composition corresponds to the version HSB 20/8 T from approx.1968, earlier versions may vary

Special features

• Standard version is the version with slotted front panel, the version "T" described here has a textile cover
• Fixed cable with DIN plug
• Housing can be opened from the rear

Remarks

Other models in the same series:

• HSB 20 with 5 ohms and presence switch (~1963).
• HSB 30/8
• HSB 45/8