{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "TELEFUNKEN ELA M 251 E Stereo Set — Microphone",
    "brand": "TELEFUNKEN",
    "model": "ELA M 251 E Stereo",
    "mpn": "ELAM251ESTEREOSET",
    "gtins": null,
    "handle": "ca-telefunken-ela-m-251-e-stereo-set-d0c5e3326c",
    "url": "https://envoy-music.myshopify.com/products/ca-telefunken-ela-m-251-e-stereo-set-d0c5e3326c",
    "catalog_product_id": "catalog:bdb5c3890180",
    "lane": "studio",
    "product_object": "condenser microphone"
  },
  "offer": {
    "price": 36635.0,
    "currency": "CAD",
    "available": true,
    "condition": "Brand New",
    "price_band": "boutique",
    "source_verified_at": "2026-07-10T23:56:52Z"
  },
  "specifications": {"category":"Tube Condenser Microphone Stereo Set","groups":[{"id":"general","label":"General","fields":[{"key":"type","label":"Microphone Type","value":"Vacuum tube condenser, large diaphragm","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"configuration","label":"Configuration","value":"Factory-matched stereo pair (capsules tuned to each other; transformers and tubes tested for matched gain and frequency response)","source":"https:\/\/www.economik.com\/products\/ela-m-251-e-stereo-set","confidence":0.95},{"key":"polar_patterns","label":"Polar Patterns","value":"Cardioid, Omnidirectional, Figure-8","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"upc","label":"UPC","value":"899051992695","source":"https:\/\/www.altomusic.com\/products\/telefunken-ela-m-251e-matched-stereo-set-elam251estereoset","confidence":0.8}]},{"id":"audio","label":"Audio Specifications (per microphone)","fields":[{"key":"frequency_range","label":"Frequency Range","value":"20 Hz – 20 kHz, ±3 dB","unit":"Hz","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"sensitivity","label":"Sensitivity","value":"17 mV\/Pa, ±1 dB","unit":"mV\/Pa","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"output_impedance","label":"Output Impedance","value":"200","unit":"Ω","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"max_spl","label":"Maximum SPL (1% THD)","value":"130","unit":"dB","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"self_noise","label":"Self Noise (Amplifier)","value":"9","unit":"dBA","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.9},{"key":"snr","label":"Signal-to-Noise Ratio","value":"85","unit":"dBA","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.9},{"key":"thd","label":"THD at 1 kHz at 1 Pa","value":"\u003c 0.2","unit":"%","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.9}]},{"id":"components","label":"Key Components (per microphone)","fields":[{"key":"capsule","label":"Capsule","value":"TELEFUNKEN Elektroakustik CK12, edge-terminated large diaphragm","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"tube","label":"Vacuum Tube","value":"6072A dual triode","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.9},{"key":"transformer","label":"Output Transformer","value":"Haufe T14\/1","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95}]},{"id":"physical","label":"Physical (per microphone)","fields":[{"key":"dimensions","label":"Dimensions","value":"216 mm L × 50 mm diameter","unit":"mm","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"weight","label":"Weight","value":"596","unit":"g","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"power","label":"Power Source","value":"External power supply (M 950ES dual supply in stereo set, powers both microphones simultaneously)","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95}]},{"id":"included","label":"In the Box (Stereo Set)","fields":[{"key":"microphones","label":"Microphones","value":"2 × matched ELA M 251E","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.95},{"key":"power_supply","label":"Power Supply","value":"M 950ES dual power supply","source":"https:\/\/www.economik.com\/products\/ela-m-251-e-stereo-set","confidence":0.95},{"key":"shock_mounts","label":"Shock Mounts","value":"2 × shock mounts","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/ela-m-251e\/","confidence":0.8},{"key":"wooden_boxes","label":"Wooden Boxes","value":"2 × WB50 wooden microphone boxes","source":"https:\/\/www.economik.com\/products\/ela-m-251-e-stereo-set","confidence":0.95},{"key":"flight_case","label":"Flight Case","value":"FC50S dual microphone system locking flight case","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/fc50s-dual-microphone-system-flight-case-ela-m-251e-stereo-set\/","confidence":0.9}]}]},
  "connectivity": null,
  "power": null,
  "included_items": null,
  "required_accessories": ["appropriate audio and data cables","compatible monitoring, mounting, or power setup"],
  "optional_accessories": null,
  "compatibility": null,
  "advisor": {
    "best_for": "Recording engineers and studios that need a matched pair of multi-pattern tube condensers for stereo work: orchestras, choirs, chamber groups, piano, acoustic guitar, percussion, and drum overheads. The three switchable patterns per mic support X\/Y (cardioid), A\/B spaced pairs (cardioid or omni), Blumlein (both in figure-8), and M\/S (cardioid + figure-8) techniques, and each mic also serves as a first-call tube vocal microphone.",
    "who_should_skip": "Anyone who only needs a single vocal microphone — the mono ELA M 251E system exists and includes the same mic with its own power supply, cable, shock mount, and cases. Also a poor fit for phantom-power-only or mobile\/location rigs: these are tube microphones that require the external M 950ES power supply and mains power, not 48V phantom.",
    "fit_notes": "Factory matching is component-level: capsules are tuned to each other, and transformers and tubes are tested for matched gain and frequency response, so both channels respond identically for critical stereo imaging. Per-mic specs: 20 Hz–20 kHz ±3 dB, 17 mV\/Pa sensitivity, 200 Ω output, 130 dB max SPL at 1% THD, 9 dBA self noise. The single M 950ES dual supply powers both mics at once, and the whole system (mics, cables, wooden boxes, supply) packs into one locking stereo flight case.",
    "watchouts": "Source conflict on the flight case: the verified retail listing listing says the set ships with an 'FC10 locking flight case', while TELEFUNKEN's own pages specify the FC50S dual-microphone stereo flight case — the manufacturer is preferred here. TELEFUNKEN's stereo-set contents include two shock mounts, but some retailer descriptions (including Economik's) omit shock mounts from the box contents — confirm with the dealer before purchase. The tube is listed as a TELEFUNKEN Elektroakustik 6072A on the manufacturer spec sheet, while retailer copy describes it as a GE JAN 6072a. Mics need tube warm-up and the external PSU; they do not run on phantom power.",
    "verification_questions": ["Which connections, drivers, operating systems, and sample rates are supported by this exact revision?","What cables, mounts, power supplies, or licenses are included?","Is the current retailer listing new stock, demo stock, open box, or special order?","Is the item still in stock at the displayed price, and what is the complete delivered cost to the intended destination?"]
  },
  "retrieval": {
    "summary": "ELA M 251 E Stereo Set is a recording and studio product represented by 1 current Canadian retailer offer, starting at 36635.00 CAD. Best suited to buyers who can place it within a known recording, monitoring, or signal-routing workflow. EnvoyMusic has verified the source price and availability signal, but has not independently verified every technical specification or US fulfillment detail. This is an verified retail listing reference, not inventory stocked or fulfilled by EnvoyMusic. Retailer price and availability can change; recheck the source before making a purchase decision. Skip it until computer, operating-system, I\/O, cabling, mounting, and room requirements are confirmed.",
    "agent_summary": "TELEFUNKEN E. visible colors: gray, brown, black, silver. visible controls: combination lock. panel text: TELE FUN KEN; E.",
    "intent_terms": ["studio","home_recording","content_creation","signal_chain","ELA M 251 E Stereo Set","TELEFUNKEN","Tube Microphones","verified retail listing","recording and studio product","home recording","content creation","signal chain"],
    "use_cases": ["studio-recording"],
    "skill_level": "pro"
  },
  "trust": {
    "has_verified_retail_listing": true,
    "source_count": 1,
    "source_tier_mix": ["retailer"],
    "evidence_flags": {"external_inventory":true,"source_availability":true,"source_price":true,"source_url":true,"structured_specs":false},
    "spec_provenance": null
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","lane:studio","verified retail listing_reference"]
}
}