Telefunken ELAM-250
A tube condenser with a fifty-year reputation, a hard-wired AC701 inside, and a midrange that engineers describe as a signature rather than a flaw.
Overview
Other microphones get compared to the ELAM-250. It turns up in studio inventories, classifieds and gear lists with no explanation, because the people reading those lists already know what it is. According to Mix (January 2013, p.72), the Pearlman 250 was built specifically to sound like the "famous" Telefunken ELA. It's a modern tribute that exists entirely because of the original.
The specs, as documented in EQ (June 1997, p.30): a vacuum-tube condenser with selectable omni, cardioid, and figure-eight patterns. Frequency response is 40 to 13,000 Hz ±3 dB, with an actual range extending to 15,000 Hz. Sensitivity is approximately 0.9 millivolts per dyne per square centimeter in omnidirectional mode. The tube is an AC701. That response figure is the one to look at. 13 kHz at the top end is not a modern spec, and it is exactly why the mic sounds the way it does. The top is soft, the mids are forward, and nothing about it tries to be neutral.
One circuit detail: the AC701 in these mics is hard-wired, not socketed. Mix (January 2013, p.72) recounts that when Telefunken built a fresh 251 for a modern session, the factory auditioned many tubes to find one resembling the hard-wired AC701 in a fifty-year-old 250. So the factory itself treats the tube as not swappable. It is the voice of the microphone, and matching it is an exercise in approximation.
EQ (June 1997, p.30) places the release at circa 1958 and pegs current market value at $7,500 to $10,000 depending on condition. That range is from 1997, so treat it as a historical data point rather than a today's-price guide — but the spread itself is instructive. Condition moves these by thousands, which tells you the pool is small and the buyers are serious.
What Owners and Engineers Say
The most useful testimony comes from people who use it on real sessions rather than in shootouts. Jamie Cullum, speaking to Electronic Musician, described keeping both an old Neumann U47 and a new Telefunken ELAM 250. He reported reaching for the 250 more often, specifically because he wanted "more air around my voice" for a certain kind of material, and because the Telefunken "doesn't lie" to him while still capturing richness. That fits the soft-top, present-mid character the specs imply.
The Garbage camp offers the other half of the picture. Butch Vig's original ELAM 250 was a known quantity on their records. When the band wanted a second mic to leave up permanently, they went to Telefunken for a new 251 rather than source another 250. The comparison that came back was that the two could be used as a stereo pair with only a subtle difference, the older 250 carrying "a little midrangey thing" that marked it as a fifty-year-old microphone. Owners report that this midrange signature is the thing you either buy the mic for or don't.
Matched pairs surface in dealer listings. A Watertown, Massachusetts shop advertised a "Telefunken Elam 250 (matched pair)" with price on request in the pages of Electronic Musician. A dealer who won't quote a number in print suggests the market is conversational and condition-driven rather than listed.
Living With One
Owning an ELAM-250 means owning a tube microphone with a hard-wired, long-obsolete tube at its center. The AC701 is not a part you keep in a drawer. Service means finding someone who knows these circuits, and the factory's own approach of auditioning many tubes to approximate a fifty-year-old one is a fair preview of what restoration involves. Buyers should assume any original example needs evaluation before it goes on a session, and should price accordingly.
The 40 Hz to 13 kHz response also sets expectations. This is not a mic for cymbals or the top of a grand piano. It is a voice mic and a midrange instrument mic. The selectable omni, cardioid, and figure-eight patterns give it more flexibility than the response curve suggests, but the character stays consistent across them.
Verdict
It is expensive and fussy to service, and its frequency response would get it laughed out of a modern spec sheet. A fifty-year-old example still has a midrange signature distinctive enough that a factory building a new mic had to try to match it. By the account of the engineers involved, it got close but not identical.
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