Musical Fidelity · A1 series integrated amplifiers

A1

The unit that made Musical Fidelity: 20 W of pure class A in a shoebox chassis, with no tone controls and no frills.

Catalogue code: A1
Years: 1984
Type: integrated amplifier (Class A)
Valves & speakers: 20 W/ch pure class A, minimalist line-only integrated
Lifecycle: retired
Confidence: High

Specifications

Watts: 20
Watts_basis: per channel, 8 ohm load unless noted in rated_load
Channels: 2
Technology: solid-state
Class_of_operation: A
Weight: 4.5 kg

Safety

Class-A unit in a small chassis: it runs hot and the original electrolytics are past their design life. Early MF units have no protection circuitry, so a DC fault can take the speakers with it.

01 / Witnesses

What applies here

Marks that can be entered for this maker: 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 1984; components only push the date later.

03 / Value

What moves the price

Sold-listing reading: fair JPY 39,000, good JPY 39,000, excellent JPY 39,000 JPY · 1 sold listings (thin sample — indicative only) · as of 2026-10-18. 1 completed sale in JPY observed on 2026-10-18. fair/good/excellent = min/median/max of the observed SOLD prices (39000 / 39000 / 39000), NOT condition grades - neither source publishes a per-condition split. Only 1 sale in this currency, so it is recorded as an estimate with sample_flag thin, not as an aggregate. Sale/completion dates span 2025-12-15 to 2025-12-15. Channels counted: mercari_sold x1. No exchange-rate conversion was applied anywhere in this file.