Akai A-25 (early 1960s)
Not much is documented about the Akai A-25. The record shows a lower-power integrated amplifier from Akai's M-40, M-50, and M-70 series, introduced in the early 1960s - one known example carries a 1963 serial number. It uses a 6BQ5 push-pull output stage, with a 12AX7 and a 12AU7 in the preamp, and has separate bass and treble controls. Power output is around 10 watts per channel. One forum report suggests it might nudge 12 watts, but that figure isn't firmly established.
The phono stage is low in gain. Owners report needing a high-output cartridge or a step-up transformer to get acceptable levels. Frequency response is described as flat from about 30 Hz to 20 kHz, which is common among well-designed tube amplifiers of this era. One enthusiast who restored a unit reports it sounds smooth through the midrange with efficient speakers like Klipsch Heresy models. The amplifier measures 15.5 inches wide, 5.5 inches tall, and 9 inches deep, and weighs about 22 pounds. Common restoration work includes replacing electrolytic capacitors, some resistors, and the power cord.
- Type: Integrated amplifier (tube)
- Output: ~10 W/ch (6BQ5 push-pull)
- Preamp tubes: 12AX7, 12AU7
- Controls: Separate bass and treble
- Dimensions: 15.5 × 5.5 × 9 in (W×H×D)
- Weight: ~22 lb
- Introduced: Early 1960s (one example dated 1963)
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