Stereo 20 vs Rogue Audio Stereo 90
The Stereo 90's power @ 8ω is 90W against the Stereo 20's 10W and its weight 27.22 kg (60 lbs) against 10 kg (22 lbs). Both share thd (0.100%) and class (Tube).
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Introduced in 1958 by H.J. Leak & Co. Ltd, the Stereo 20 is a highly regarded valve amplifier known for its musical warmth and clarity. It features four EL84 output valves, three ECC83 preamp valves, and a GZ34 rectifier tube. The amplifier delivers 10 watts per channel and is noted for its lucid midrange and soft bass, characteristic of vintage tube sound. It uses a single GZ34 rectifier with resistor/capacitor smoothing and includes a safety resistor that disconnects under overload to protect the power supply. The Stereo 20 was one of the ten best amplifiers of the 1950s, praised for its musical heart and ability to reveal instrumental and vocal details. Dimensions are approximately 27 x 33 x 18 cm, and it weighs about 10 kg. It originally came in champagne gold and later dark grey finishes. The amplifier is designed for 110V operation and pairs well with Leak preamplifiers or other suitable sources. It remains popular among collectors and audiophiles for its vintage sound and build quality.
Amplification power output and characteristics
Analog signal output specifications
Size, weight, and appearance
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Estimated price (community-sourced)
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Components that show up alongside the Stereo 20 in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Stereo 90's power @ 8ω is 90W against the Stereo 20's 10W and its weight 27.22 kg (60 lbs) against 10 kg (22 lbs). Both share thd (0.100%) and class (Tube).
The Horn Mono's power @ 8ω is 25W against the Stereo 20's 10W, its thd 0.020% against 0.100%, and its weight 13.61 kg (30 lbs) against 10 kg (22 lbs). Both share class (Tube).
The M520's power @ 8ω is 24W against the Stereo 20's 10W, its thd 1.000% against 0.100%, and its weight 23 kg (51 lbs) against 10 kg (22 lbs). Both share class (Tube).
The ProLogue Four's power @ 8ω is 35W against the Stereo 20's 10W, its thd 1.000% against 0.100%, and its weight 17.01 kg (38 lbs) against 10 kg (22 lbs). Both share class (Tube).
Scott 222D
Dynaco ST70
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