The Kenwood TK-250 is a vintage solid-state stereo integrated amplifier manufactured in Japan during the late 1960s (circa 1967). 

History and Background

• Era: Built during the transition from vacuum tubes to solid-state (transistor) electronics, the TK-250 represents early vintage hi-fi engineering.

• Naming and Rebranding: This model is closely related or identical in design to the Kenwood KA-2500, with "TK" designations often used for specific regional or distributor markets (and sometimes sold or rebranded under names like Trio, Kenwood's original corporate identity).

• Design: It features all-metal construction, often accented with an imitation wood-grain cabinet sleeve, heavy-duty tactile knobs, and precise switches.

Key Specifications

• Power Output: 20 watts per channel continuous into 8 ohms (up to 25 watts music power)

• Frequency Response: 20Hz to 50kHz

• Speaker Impedance: Compatible with 4Ω to 16Ω loads

• Inputs: Phono (magnetic cartridge), Tuner, Aux, and Tape inputs

• Controls: Bass and treble tone controls (separate for L/R), loudness switch, low/high audio filters, and Speakers A/B switching

• Dimensions & Weight: Approximately 330 x 105 x 237 mm, weighing about 5.9 kg

This unit was recapped in the power amp section and power supply. Metal cabinet was spray painted in matte black.