JH-400 Series
1971 – 1983
Notable users
Criteria Studios, Miami (Eagles / Hotel California, Fleetwood Mac / Rumours, Bee Gees / Saturday Night Fever), Other Florida + American studios mid-70s
Technical specs
| Channels | 16 – 40 |
| Layout | Split |
| Groups | 16 |
| EQ | 3-band |
| Era | ~1971 – 1978 |
| Build | Florida-built (MCI HQ, Fort Lauderdale) |
| Famous records | Hotel California (1976), Rumours (1977), Saturday Night Fever (1977) |
| Character | Open low end + Florida warmth |
The JH-400 holds a unique place in console history: it was the first console ever built with an in-line configuration, integrating both the recording and tape-return paths on a single channel strip. The idea came from audio engineer and dealer Dave Harrison, who commissioned MCI to build a console capable of switching between recording and mixing workflows without the engineer having to physically reconfigure the desk. Every in-line console that followed — Neve, SSL, Harrison's own company — owes its architecture to this moment. The JH-400B refinement brought automation capability (JH-50 automation package), improved EQ, and lower distortion.
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Notable Recordings
- Eagles — Hotel California (Criteria Studio C)
- Bee Gees — Saturday Night Fever (Bee Gees-tracks: primarily Château d'Hérouville with overdubs/remix at Criteria)
- Eric Clapton — 461 Ocean Boulevard (likely; Criteria, 1974)
Studios
- Criteria Studios, Miami
- Studio 55, Los Angeles