Telefunken ELA M 251E
One of the tube condensers that engineers reach for first, and a name that keeps showing up on the short list of the most sought-after microphones ever built.
Overview
The ELA M 251E occupies rare air. When engineers assemble their short list of the great multipattern tube condensers, Mix (October 2001, p.184) placed the Telefunken ELA M251E/250E among the three most sought-after tube condenser microphones, alongside the Neumann U47 and the AKG C-12. That is the company the 251E keeps — a vocal-room staple whose reputation was built long before most of the gear now crowding studio racks existed.
The 251E's standing is less about a spec sheet than about what it does on a voice. In a Mix (March 2014, p.63) roundup of new microphones, the ELA M 251E was characterized as an exemplary recreation of one of the most beautiful tube mics in history — a line that speaks as much to the original's mystique as to the reissue's execution. The same roundup set it beside the Royer Labs R-122V, Bock Audio iFET, Peluso P 84, and Beyerdynamic MC 840, a group that sketches the mic's competitive territory: serious tube and ribbon vocal tools for working professionals.
What the 251E is known for is a voice that sits forward and clear without turning brittle. In a Mix (October 2001, p.184) field test of a competing multipattern tube mic, the reviewer noted that the secondary transformer turns ratio matched the Tele and provided a more uniform impedance versus frequency than the original — a small technical aside that says a lot about why the 251E's transformer and amplifier circuit are studied and copied. The circuit has become a reference point in its own right.
The 251E's design DNA spread widely through the modern Telefunken line. When the company introduced the AR-51, Mix (March 2010, p.59) reported that it used the same circuit design as the ELA M 251E; later coverage in Mix (March 2010, p.59) and Pro Audio Review described the AR-51 as borrowing its amp circuitry from the acclaimed ELA M 251E and C-12. The 251E, in other words, became the template — a circuit designers kept returning to when they wanted a proven tube front end.
Its place in the working studio is easy to trace through the credits. In a Mix-adjacent Electronic Musician profile, an engineer laid out a vocal chain that ran a Telefunken ELA M 251E into a Chandler Limited LTD-1 EQ/preamp and then a Distressor — the kind of signal path that treats the mic as the first and most important choice in the chain. The same profile noted the 251E among the mics an engineer might put up alongside a Neumann U47, Sony C-800G, Neumann U67, or Ocean Way 6050 when auditioning a singer. It is a first-call vocal mic, not a specialty item pulled out for effect.
For anyone weighing one today, the practical picture is a tube condenser that rewards good rooms and good technique. Engineers who use the 251E routinely describe positioning it four to eight inches off the singer with a windscreen set to hold that distance, precisely because moving in closer darkens and muddies the tone through proximity effect. The mic flatters a controlled singer; it does not forgive a sloppy one. That is the trade for a sound this recognizable, and it is why the 251E has stayed on the short list for as long as it has.
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