• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1990

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 173760

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• 2 Loudspeakers

• Power out
• 80 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Speaker System APM-121ES - Sony Corporation; Tokyo

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 250 x 430 x 295 mm / 9.8 x 16.9 x 11.6 inch

• Notes
• Bookshelf two-way bass-reflex speaker system. Square woofer 140x140mm with sandwich honeycomb aluminum diaphragm and 19mm dome tweeter with aluminum diaphragm. Cross-over @ 3kHz,nominal impedance 8Ω, sensivity 88dB SPL at 1 metre for 1 watt. Frequency response 35Hz-20kHz, power handling 80W sine (140W music).
  Finish: black oak with black grill cloth.
  This model was developed for "european ears" and manufactured in Germany (and maybe also in United Kingdom?).
  APM means "Accurate Pistonic Motion".

• Net weight (2.2 lb = 1 kg)
• 9 kg / 19 lb 13.2 oz (19.824 lb)

• Mentioned in
• Gramophone (UK), July 1990

• Author
• Model page created by Georg Richter. See "Data change" for further contributors.

• Other Models

• Here you find 3913 models, 3773 with images and 947 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo