The sixty systems
Sixty system slots: five quality tiers (Lo → Hi) crossed with six listening philosophies and six fixed mandates, each resolved in both directions — forward (source-first) and aft (speaker-first). Every pick on every page was derived offline by the frozen engine and baked into this site at build time.
See also: the bespoke speaker and its 23-chain challenge · the component rankings, stage by stage.
Philosophy slots
Open architecture: integrated, power and mono amplification compete per slot.
Mandate slots
Fixed-recipe mandates — a redesign to six new mandates is in progress (model v2).
60 slots · 23 chains carry an ER-alternative panel (on 22 pages) · catalogue schema version 2.