Linn LK140 (1991–1996)
The Linn LK140 is a stereo power amplifier built in Glasgow by Linn Products from 1991 to 1996. It put out 60 watts per channel into 8 ohms from conventional class-AB output stages. Linn designed it to partner with its own preamplifiers and source components. Nothing exotic here, just solid engineering and a clean faceplate.
The specs are honest mid-1990s solid-state. Frequency response is rated at 10Hz - 45kHz. Input sensitivity is 300mV for rated output, input impedance is 10kΩ, and output impedance is stated at under 0.02Ω. Signal-to-noise is quoted at 90dB, and THD is 0.05% at full output. It's a compact unit at 430 × 85 × 275mm and 7.5kg, a modest chassis for a modest power rating.
The LK140 appeared in Audio magazine's power amplifier coverage in October 1998 (p.82). At introduction it sold for $895 in the US (1995) and £695 in the UK (1994).
Documentation on the LK140 is thin beyond the basics. The 1991 introduction date is confirmed, as is the 1991 - 1996 production window. Nothing is recorded about its position relative to other Linn amplifiers of the period, its reception among reviewers, or common maintenance issues. What is known is that it's a 60W stereo amplifier from a company better known for turntables, built to a sensible price point.
Known specifications:
- Power output: 60W per channel into 8 ohms
- Frequency response: 10Hz–45kHz
- Input sensitivity: 300mV for rated output
- Input impedance: 10kΩ
- Output impedance: <0.02Ω
- Signal-to-noise ratio: 90dB
- THD: 0.05% at 60W
- Dimensions: 430 × 85 × 275mm (W×H×D)
- Weight: 7.5kg
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