• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1994 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 292207

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
• Dry Batteries / AA: 2 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.5 cm = 2.6 inch

• Power out
• 0.4 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Speaker System SRS-28 - Sony Corporation; Tokyo

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 75 x 110 x 39 mm / 3 x 4.3 x 1.5 inch

• Notes

• Dual Active Speakers for Walkman and Discman.  Bass Reflex, Phono and Mini-plug Input, 0.4W X2 Speaker System, each Speaker operates on two AA's.

• Net weight (2.2 lb = 1 kg)
• 0.170 kg / 0 lb 6 oz (0.374 lb)

• Mentioned in
• -- Original-techn. papers.

• Literature/Schematics (1)
• - - Manufacturers Literature (1994 Sony General Catalogue, page 38.)

• Author
• Model page created by Sándor Selyem-Tóth. See "Data change" for further contributors.

• Other Models

• Here you find 3977 models, 3837 with images and 955 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo