Yamaha (Hi-Fi) · C-series separate control amplifiers

C-2a

The 1978 revision of the C-2 with a reworked phono stage and moving-coil capability.

Catalogue code: C-2a
Years: 1978
Type: preamplifier
Valves & speakers: Updated C-2 with an improved phono stage
Lifecycle: retired
Confidence: Medium

Specifications

Channels: 2
Technology: solid-state
Class_of_operation: not stated in the catalogue sheet
Weight: 7.9 kg

Safety

Mains-powered vintage Yamaha: the V-FET devices in the B-1/B-2 are long out of production and fail if the bias drifts, so never run an unrestored unit hard. Japanese-market units are 100 V - use a step-down transformer.

01 / Witnesses

What applies here

Marks that can be entered for this maker: Model / catalogue number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code, Version & era marker.

02 / Bounds

The model year is a floor

Nothing predates 1978; components only push the date later.

03 / Value

What moves the price

Sold-listing reading: fair JPY 18,749, good JPY 52,800, excellent JPY 64,000 JPY · 4 sold listings (thin sample — indicative only) · as of 2026-10-18. 4 completed sales in JPY observed on 2026-10-18. fair/good/excellent = min/median/max of the observed SOLD prices (18749 / 52800.0 / 64000), NOT condition grades - neither source publishes a per-condition split. Sale/completion dates span 2026-09-21 to 2026-10-14. Channels counted: yahoo_closed x4. No exchange-rate conversion was applied anywhere in this file.