Sennheiser MD 211 N Matched Pair - Sequential Serials (#21125 & #21126) w/ Factory Charts, Original Cases & Clips

Rare, factory-matched vintage stereo pair of Sennheiser MD 211 N dynamic omnidirectional microphones in excellent condition. Complete with consecutive serial numbers (#21125 and #21126), original Sennheiser factory measurement sheets (Prüffeld charts), original Sennheiser storage cases, and original mic mounting clips. Overview & Sonic Characteristics The Sennheiser MD 211 N is a high-end, studio-grade dynamic omnidirectional pressure transducer renowned for its wide, ruler-flat frequency response (50\text{ Hz} - 20,000\text{ Hz}) and complete lack of proximity effect. Frequently cited as one of Sennheiser's finest vintage dynamic capsule designs, it delivers natural transient response, high detail, and low distortion even under extreme SPL. Because omnidirectional dynamic mics capture natural room tone without artificial low-end buildup, this sequential pair is an ideal choice for: Stereo A/B & Spaced Pair Miking (Drum overheads, acoustic guitar, piano, choir) Room & Ambient Capture Close-Miking High SPL Sources (Guitar cabs, brass, percussion) Consecutive Provenance & Acoustic Matching Sequential Serial Numbers: Units 21125 and 21126 were manufactured side-by-side during the same production run. Original Measurement Charts Included: Comes with both original Sennheiser Prüffeldfrequency plot cards, stamped with identical batch code BC and signed off under identical test conditions (50\text{ dB} Pot calibration). Acoustically Verified: As documented on the included charts, both capsules share identical baseline output sensitivity (15\text{ dB} on 0.2\text{ mV/}\mu\text{bar}) and trace the exact same frequency curve from 20\text{ Hz} to 20\text{ kHz} (\le \pm 0.5\text{ dB} deviation), guaranteeing accurate stereo imaging and phase coherence. Technical Specifications Transducer Type: Dynamic Moving-Coil (Pressure Receiver) Polar Pattern: Omnidirectional Frequency Response: 50\text{ Hz} - 20,000\text{ Hz} Nominal Impedance: 200\text{ }\Omega Sensitivity: 1.6\text{ mV/Pa} Dimensions: 22\text{ mm} diameter \times 120\text{ mm} length Connector Variant: 3-pin Klein-Tuchel (DIN) connector (MD 211 N variant) Condition Operational: 100% fully functional. Both capsules respond identically with low noise floors and full output efficiency. Microphone Cosmetics: Clean vintage condition with minor aesthetic wear consistent with age. Solid metal body structure with no body dents or grid deformations (see photos for detailed close-ups). Accessories Condition: Original cases open and close securely; original mic clips are intact, fully functional, and hold both slim-barrel microphones snugly. What’s Included (1) Sennheiser MD 211 N Dynamic Microphone — Serial #21125 (1) Sennheiser MD 211 N Dynamic Microphone — Serial #21126 (2) Original Factory Sennheiser Prüffeld Frequency Measurement Sheets (2) Original Sennheiser Hard Storage Cases (2) Original Sennheiser Microphone Stand Clips Shipping & Handling Meticulously packed in protective bubble wrap inside a heavy-duty shipping box. Feel free to reach out with any questions or request additional photos/audio samples prior to purchase!