• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1976–1978

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 127484

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Loudspeaker + integr.Amplifier

• Power type and voltage
• Alternating Current supply (AC) / 110-240 Volt

• Loudspeaker
• 2 Loudspeakers

• Power out
• 30 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Motional Feedback Box 541 Electronic 22RH541 /00R - Philips; Eindhoven tubes

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 230 x 295 x 175 mm / 9.1 x 11.6 x 6.9 inch

• Notes
• Caja electronica, con un altavoz para medios, Woofer y Tweeter para agudos. Entrada de senal con tres niveles. Amplificador de potencia de 30W.
  Aktive Lautsprecherbox, Zweiweg-System mit Beschleunigungs-Gegenkopplung (Motional Feedback, MFB) im Tieftonteil, geschlossenes Gehäuse, akustisch bedämpft.
  Lautsprecher-Systeme: Tief-Mittelton 180 mm, Hochton 25 mm (Kalotte).
  Bruttovolumen: 11,8 Liter, netto 8 Liter.
  Frequenzumfang: 35-20000 Hz nach DIN 45500
  Steuerspannung 1 V an 10 kOhm, 7,5 V an 100 Ohm, 19 V an 100 Ohm.

• Net weight (2.2 lb = 1 kg)
• 6.5 kg / 14 lb 5.1 oz (14.317 lb)

• Mentioned in
• HiFi-Jahrbuch 8, G. Braun Verlag, Karlsruhe 1976

• Literature/Schematics (1)
• Handbuch VDRG 1976/1977

• Literature/Schematics (2)
• Handbuch Rundfunk Fernsehen Phono (Thiele) 1977/78 S.232

• Literature/Schematics (3)
• -- Original-techn. papers.

• Author
• Model page created by Diego Fernandez-Fernandez. See "Data change" for further contributors.

• Other Models

• Here you find 5274 models, 4422 with images and 3459 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt