Mastering and pressing facility in London, UK.

Name variations:
- Master Room
- Mastering Room
- The Master Room
- The Master Rooms, London
- Masterroom, London

Engineers known to have worked here: George Peckham aka Porky (5), Tony Bridge (1975-1976, 1984-1987), Denis Blackham (1976-1977) aka BilBo (3), Julian Mills (1978), Arun Chakraverty (since 1979, and from 1981 onwards as owner and director).

Operated a Neumann VMS80 lathe with SX74 cutter and PG74B cutting head drive amplifiers since 1985.

On Lyntone pressings, Master Room lacquers can be identified by
IM / 2M (pre 1978) or
IMSR / 2MSR (since 1978)
In those cases, Master Room can be credited with Lacquer Cut At.