Sennheiser MD-112
A microphone that survives almost entirely in the small print of the classifieds - £44 new, £32 on special offer, and not much else on the record.
Overview
Most of what can be said with confidence about the Sennheiser MD-112 comes from the trade classifieds of the early 1970s. It shows up as a line item in dealer ads, not as the subject of a review. The London dealer J. J. Francis (Wood Green) ran the same offer across several issues of Studio Sound - a new, boxed MD112 microphone at a normal price of £44, discounted to £32. The same block of copy appears in the October 1972 issue, again in May 1972, January 1973, February 1973, March 1973, April 1973, and May 1973. So the mic was a stocked, moving item in the British pro-audio trade, not a rare special order.
A dealer does not keep paying for the same display ad over the better part of a year for a product nobody buys. The MD-112 was part of the working inventory of a professional audio shop in the early 1970s. It sat in the same offer block as the AKG D109, D202E1 and D190C, the Sennheiser MD211 and MD413, and the HD414 headphones, and it was priced and sold alongside them as a normal catalog item.
The £44 list price is the one hard number the documentation preserves. It puts the mic in the budget-to-midrange of the dealer's microphone offers - well below the MD418 at £45 and the MD211 at £32 in the same ad, and a step above the cheapest AKG dynamics at £11 and £15. That is not a measurement, but it is a real market position, and it is more than most orphaned models leave behind. The £32 special offer, roughly a quarter off list, is the kind of discount a shop applies to move stock.
The record does not contain much else. No frequency response, no impedance figure, no sensitivity, no polar pattern, no weight or dimensions, no connector type, and no confirmed production start or end years appear in any source consulted. The available documentation does not establish whether the MD-112 was a dynamic or a condenser. Its placement among the MD-series dynamics in dealer copy is suggestive, and nothing firmer than that. Collectors trying to pin down a used example should treat any spec attributed to this model with suspicion unless it comes from a Sennheiser document naming the MD-112 directly.
There is also no published review literature to lean on. This was a working microphone that passed through studios and dealers, and the trace it left is a price tag in a classified column.
The mic circulated at a modest price in the early 1970s British trade. It was sold new and boxed by at least one established London dealer, and it shared shelf space with Sennheiser's better-documented MD-series models. Beyond that, the archive has nothing to confirm - no original packaging details, no accessory list, no service documentation, no common-failure record. Current market pricing and parts availability are undocumented, and none should be assumed.
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