McIntosh ML-4M
Little is documented about the McIntosh ML-4M, and what survives is tangled up in a naming problem. The designation appears to cover two different things: a complete 5-way, 11-driver loudspeaker system, and a replacement tweeter component (part number 036-016) sold for use inside such a system. Parts listings sell the tweeter. Service literature describes the full speaker. Nothing in the record settles whether these were ever the same product line or just share a confusingly similar label. Treat the ML-4M as an ML-series McIntosh loudspeaker, and read the context carefully wherever the name shows up.
Factory service documentation exists for owners: an original OEM service information manual for the ML4M Loudspeaker System, covering serial numbers L1F001 and above, with disassembly instructions, schematic diagrams, and parts lists. It is the most useful thing the archive has on this model, and it confirms the ML-4M was a real, supported product rather than a one-off. The tweeter, when it turns up, has been listed at roughly $25 to $99 on parts sites.
Beyond that, the record is bare. No production years, original price, dimensions, weight, or frequency response have surfaced. Even the "1970s" dating that circulates is uncorroborated - one description says it, and nothing else backs it up. An owner's manual, a period brochure, or a dealer sheet for the ML-4M would help a lot.
What is known:
- Type: 5-way, 11-driver loudspeaker system (per two sources)
- Replacement tweeter part number: 036-016
- Service manual covers serial numbers L1F001 and above
- Part of McIntosh's ML series of loudspeakers
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