ReVox Studio 4 mk2, 198?, made in Germany

Link: revoxsammler.ch

Country: Germany
Manufacturer / Brand: Studer GmbH, Willi (ReVox); Löffingen Brand ReVox (brand)
Year: 1985 ?

Specifications:
Range of transmission: 40 Hz -22 kHz
Load rating: 80w
Music load rating: 100 w
Rated impedance: 4 Ohms
Recommended amplifier output: 20- 100 Watts
Distortion factor (k3 max) in transmission range (related to 91 dB at 2m distance equalling an output of 6.8 Watts): 0.3%
Pratical operating output for 91 dB at 1 m: 3W
Loudspeaker components parts:
Magnetic flux density:

• Low frequency in Tesla (Gauss) 0.85 (8500)
• Medium frequency in Tesla (Gauss) 1.35 (13500)
• Hihg frequency in Tesla (Gauss) 1.65 (16500)

Magnetic flux in μWb:

• Low frequency 420
• Medium frequency 660
• High frequency: 230 mm

Speaker Dimensions:

• Low frequency: 230 mm
• Collar medium frequency: 38 mm
• Collar high frequency: 19 mm

Transmission frequency: 800 Hz / 5 kHz
Connection: Sliding binders
Weight: 11 kg / pcs.
Dimensions (HxWxD): 462х305х298 mm
Casing design: Textured sheeting, ash black
Miscellaneous: Automatic high frequency protection circuit, Removable front cover.