MRL — equalisation fundamentals ↗
Recording/playback curves; the discussion is specifically for 15 ips.
Primary documents first. Context always.
Research checked 2 November 2026. Manufacturer information describes advertised specifications, not independently tested performance. Original manuals remain authoritative for exact vintage versions. Archive hosts do not become the manufacturers of the documents they preserve.
Recording/playback curves; the discussion is specifically for 15 ips.
Reference flux, equalisation and calibration-tape selection.
Gentle transport, tape tension and format-specific alignment.
Identification, condition and preservation.
Current tape families and calibration.
Master Tape and MDS-36 construction.
Current manufacturer listing and price.
Current configurable machine; confirm ordered specification.
Playback-only, three speeds and switchable EQ.
Manufacturer operating notes.
Analogue and digital source options; published copy prices.
Original manufacturer manuals hosted by an independent archive.
Original manufacturer document hosted by an archive.
Manufacturer document transcribed by an independent archive.
Example of a documented commercial copying chain.
Manufacturer brochure: track systems, speeds and NAB EQ.
Manufacturer documents hosted by an independent archive.
Current specialist rebuilding and configuration service.
Original specifications and speed-dependent EQ; see pages 2–3.
Original operation and maintenance manual, archived by a recording museum.
Manufacturer historical page and downloadable operating/service documentation.
Original instruction manual: domestic stereo tracks and two speeds.
Specific ¼-inch, 3600-foot, 10½-inch reel listing for the quoted price.
Technical explanations draw on calibration literature, original manufacturer documents and preservation guidance. Current model descriptions use manufacturer pages. Conflicting sales descriptions are not used to override a manufacturer specification.
Only clearly identified published examples are treated as observed prices. Broad GBP bands are editorial planning envelopes, not market research or individual model valuations.
No. This encyclopedia explains formats and selection criteria. It does not claim hands-on testing or rank brands by sound quality.
The supplied reel image is used as the project’s visual reference. Product names identify their respective manufacturers; inclusion does not imply endorsement. Original diagrams are schematic, not product photographs.