Sherwood S-6020CP (1980)
The Sherwood S-6020CP is a stereo preamplifier introduced in 1980 as part of the company's 6000 Series of separates. It was the control center to pair with the S-6040CP MOSFET power amplifier and the S-6010CP digital synthesizer tuner. HiFI-Stereo (March 1983, p.2) described it as a design that used "no ICs," which suggests a discrete or JFET-based signal path. Enthusiast disassembly photos back that up, showing JFETs in the control and gain stages. The preamp shared its phono and tuning circuitry with the S-2680CP receiver, which earned a reputation for pulling in stations as well as far more expensive tuners (Audio, cited in Sherwood's own 1983 advertising). The S-6020CP was also rebadged as the LXI AM 4022 and the Inkel PD2100, so it got a wider retail footprint than its Sherwood sales suggest.
Specs as recorded in a Gammaelectronics report (citing a High Fidelity equipment report, January 1983): frequency response was rated from 1 Hz to 100 kHz, total harmonic distortion at 0.02%, and it came with a limited three-year parts-and-labor warranty. The front panel measured 17½ by 2½ inches, with a chassis depth of 14½ inches, housed in a metal case. The JFET topology and wide bandwidth point to a design aimed at clean, extended response rather than a voiced or colored sound.
Known specs:
- Introduced: 1980
- Frequency response: 1 Hz – 100 kHz
- Total harmonic distortion: 0.02%
- Front panel: 17½ × 2½ inches; chassis depth 14½ inches
- Warranty: Three years (limited, parts and labor)
- Circuitry: JFET-based, no ICs in the main signal path
- Rebadges: LXI AM 4022, Inkel PD2100
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