Yamaha UC-1 (mid-1970s)
The UC-1 is one of the more obscure pieces Yamaha made for its high-end 1970s lineup. Little is documented about it beyond its role as a companion control unit to the Yamaha B-1 power amplifier. Audio (August 1975, p.60), reviewing the B-1, described the UC-1 as a companion unit with peak-reading power meters and speaker switches. It adds about 14 lbs to the stack - the B-1 itself weighed roughly 95 lbs. The same review noted that the UC-1's switching allowed five pairs of speakers to be compared at equal volume levels, with no need for high-level line pads that could degrade power and damping characteristics.
What can be said with confidence is small. The UC-1 was a substantial, meter-equipped control unit meant to sit beside the B-1 in Yamaha's top-tier system of the period. It survives in the period record mainly as a footnote to that amplifier. No service manual, full specification sheet, or production details have surfaced in the archive.
Known details:
- Companion control unit for the Yamaha B-1 power amplifier
- Peak-reading power meters
- Speaker switches allowing comparison of up to five pairs at equal volume
- Approximately 14 lbs
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- Yamaha CR-440 (1977)
- Yamaha CR-1000 (1973)
- Yamaha CR-3020 (1975)
- Yamaha R-100 (1983)
- Yamaha CR-400 (1975)
- Marantz 2226 (1974-1976)
- Marantz 2226B (1979-1980)
- Marantz 2235 (1974-1977)
- Marantz 2238B (1978-1980)
- Marantz 2250B (1978-1980)