Kenwood KT-6050 (1993–1996)
The KT-6050 is a late-period Kenwood FM/AM tuner, sold in Japan around 1993 at ¥45,000. It was the company's first *separate* tuner to support AM stereo. AM stereo was rare in component audio gear, and Kenwood clearly leaned into it - the MPX section was strengthened specifically for AM stereo, widening the range by roughly 30% compared with conventional AM tuners of the period.
Kenwood packed the KT-6050 with its own reception circuitry. The Direct Linear Reception Circuit (DLRC) guarantees a 95 dB mono signal-to-noise ratio across the entire FM band. The Distortion Collecting Circuit (DCC) gives high selectivity with low distortion. The Direct Linear Loop Detector (DLLD) is their name for a phase-locked loop detector, the same circuit family found in the KT-990D and Basic T2. A microcomputer continuously judges incoming radio-wave conditions - input sensitivity, adjacent interference - and adjusts reception in 39 steps, including a 7-step RF attenuator (0 dB to -15 dB) and a wide/narrow IF band selector. The front end uses gallium arsenide (GaAs) elements, which is an unusual choice.
The front panel is busy. There's a 3-channel signal meter plus a digital field-strength readout in dB, useful for aiming antennas. Antenna A/B switching automatically selects the better of two FM antennas, with manual tact-switch override. There's 3-station program memory with backup, and a "Chinese arrowhead control" that switches between Stereo and Hi-Blend depending on conditions. A low-pass filter built from discrete active circuitry removes any leaked stereo pilot signal from the analog output. The KT-6050 also came with a 29-key full remote control, and was designed to work with Kenwood pre-main amplifiers and AV amplifiers for system-wide remote operation.
The specs are strong for the era: FM sensitivity of 0.95 µV / 10.8 dBf (mono), 0.007% mono THD, 95 dB mono S/N, 60 dB selectivity (wide), and 60 dB stereo separation at 1 kHz. It draws 20W, measures 440 × 98 × 331 mm, and weighs 4.5 kg. The FM band is the Japanese 76-90 MHz range, and it runs on 100 VAC. Outside Japan, you'll need a step-down transformer and, ideally, a band-expansion modification.
The record on the KT-6050 is thin. No period reviews have surfaced, and owner discussion is sparse. What survives is the spec sheet, the service manual (available in English and Japanese), and the occasional eBay listing.
- FM/AM tuner, 76–90 MHz FM (Japan band), 531–1602 kHz AM
- FM sensitivity: 0.95 µV / 10.8 dBf (mono)
- FM THD: 0.007% mono / 0.015% stereo (wide, 1 kHz)
- FM S/N: 95 dB mono / 86 dB stereo
- First Kenwood separate tuner with AM stereo
- GaAs front-end, DLRC/DCC/DLLD circuits, 39-step microprocessor reception control
- 3-station memory, antenna A/B switching, digital dB field-strength display
- ¥45,000 (1993, Japan)
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