McIntosh numbered almost every model in its own sequence, and the per-model ranges compiled from the production books are the closest thing American hi-fi has to an official table. The letter inside a number is a production-run mark, not a year, which is the mistake most online advice repeats. Sales records stopped when the one employee who kept them retired, so nothing after that can be confirmed by the factory.
From the 50W-1 and the A116 through the MC30, MC60, MC75, MC240 and the MC275, each power amplifier carried its own serial sequence, and the ranges are documented model by model. The C-series preamps run in parallel sequences of their own.
The MC2100/MC2105 and the later MC2300 lines move to transistors while keeping the same serial discipline; the MA and C ranges follow. The documented per-model windows are what this archive reads.
| Series | Years | Rows | Era note |
|---|---|---|---|
| A116 | 1953–1954 | 1 | |
| C 11 STEREO | 1961–1963 | 1 | |
| C 20 (EARLY) STEREO | 1959–1961 | 1 | |
| C 20 (LATE) STEREO | 1961–1963 | 1 | |
| C 20 (MID) STEREO | 1960–1961 | 1 | |
| C 22 STEREO | 1963–1972 | 1 | |
| C 24 STEREO | 1964–1970 | 1 | |
| C 26 STEREO | 1968–1978 | 2 | |
| C 28 STEREO | 1970–1978 | 3 | |
| C 29 STEREO | 1978–1985 | 1 | |
| C 32 STEREO | 1977–1982 | 1 | |
| C 33 STEREO | 1981–1986 | 1 | |
| C 4 MONAURAL | 1954–1959 | 2 | |
| C 8 MONAURAL | 1955–1959 | 1 | |
| MA 230 STEREO | 1963–1966 | 1 | |
| MA 5100 STEREO | 1966–1972 | 2 | |
| MA 6100 STEREO | 1975–1979 | 1 | |
| MA 6200 STEREO | 1978–1991 | 1 | |
| MAC 1500 | 1965–1967 | 1 | |
| MAC 1700 | 1966–1973 | 2 | |
| MAC 1900 | 1973–1979 | 3 | |
| MAC 4100 | 1978–1985 | 2 | |
| MC 100 MONAURAL | 1970–1974 | 1 | |
| MC 2100 STEREO | 1969–1978 | 2 | |
| MC 2105 STEREO | 1967–1978 | 3 | |
| MC 2120 STEREO | 1976–1982 | 1 | |
| MC 2125 STEREO | 1976–1981 | 1 | |
| MC 2200 STEREO | 1976–1982 | 1 | |
| MC 2205 STEREO | 1975–1981 | 2 | |
| MC 225 STEREO | 1961–1967 | 1 | |
| MC 2300 STEREO | 1971–1980 | 1 | |
| MC 240 (EARLY) STEREO | 1960–1961 | 1 | |
| MC 240 (LATE) STEREO | 1965–1969 | 1 | |
| MC 240 (MID) STEREO | 1961–1965 | 1 | |
| MC 250 STEREO | 1967–1979 | 1 | |
| MC 2500 STEREO | 1980–1990 | 1 | |
| MC 2505 | 1967–1977 | 2 | |
| MC 275 STEREO | 1961–1970 | 2 | |
| MC 30 (A 116B) MONAURAL | 1954–1962 | 2 | |
| MC 40 MONAURAL | 1962–1969 | 1 | |
| MC 50 MONAURAL | 1969–1978 | 1 | |
| MC 502 STEREO | 1978–1989 | 1 | |
| MC 60 MONAURAL | 1955–1961 | 2 | |
| MC 75 MONAURAL | 1961–1970 | 1 | |
| MC 754 STEREO | 1988–1992 | 1 | |
| MK 30 | 1960–1961 | 1 | |
| MR 55 | 1957–1959 | 1 | |
| MR 65 | 1961–1962 | 1 | |
| MR 65A | 1961–1962 | 1 | |
| MR 65B | 1962–1963 | 2 | |
| MR 66 | 1962–1964 | 1 | |
| MR 67 | 1963–1969 | 1 | |
| MR 71 | 1963–1972 | 2 | |
| MR 73 | 1969–1971 | 1 | |
| MR 74 | 1972–1982 | 1 | |
| MR 75 | 1980–1985 | 1 | |
| MR 77 | 1970–1977 | 1 | |
| MR 78 | 1972–1984 | 2 | |
| MX 110 (EARLY) | 1962 | 1 | |
| MX 110 (LATE) | 1963–1969 | 2 | |
| MX 110 (MID) | 1962–1963 | 1 | |
| MX 112 | 1968–1974 | 1 | |
| MX 113 | 1971–1980 | 1 | |
| MX 114 | 1969–1971 | 1 | |
| MX 115 | 1972–1974 | 1 |
52 McIntosh Laboratory models are catalogued with their production years, specs and safety notes.
Browse the models →No public lookup exists, but the per-model ranges are documented (the production history 1949–1999 and Roger Russell's records). The decoder reads them once you name the model.
Run letters (500D5-style) mark the production batch, not a year — the archive matches a number against the documented run shapes instead of guessing.
McIntosh built in batches from pre-made sub-assemblies, so a serial of one era can sit on a chassis of the next; the archive reports the range rather than correcting either source.
Compiled from 496 published sources — the source library.