Musical Fidelity · A100 integrated amplifiers

A100

The A100 scaled the A1 formula up to 50 W of pure class A in a full-width chassis.

Catalogue code: A100
Years: 1990
Type: integrated amplifier
Valves & speakers: 50 W/ch pure class A
Lifecycle: retired
Confidence: Medium

Specifications

Watts: 50
Watts_basis: per channel, 8 ohm load unless noted in rated_load
Channels: 2
Technology: solid-state
Class_of_operation: A
Weight: 9.5 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 1990; components only push the date later.

03 / Value

What moves the price

Sold-listing reading: fair JPY 36,506, good JPY 40,501, excellent JPY 45,800 JPY · 3 sold listings (thin sample — indicative only) · as of 2026-10-18. 3 completed sales in JPY observed on 2026-10-18. fair/good/excellent = min/median/max of the observed SOLD prices (36506 / 40501 / 45800), NOT condition grades - neither source publishes a per-condition split. Sale/completion dates span 2026-09-13 to 2026-10-01. Channels counted: yahoo_closed x2, mercari_sold x1. No exchange-rate conversion was applied anywhere in this file.