{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "TELEFUNKEN U48 Stereo Set — Microphone",
    "brand": "TELEFUNKEN",
    "model": "U48 Stereo",
    "mpn": "U48STEREOSET",
    "gtins": null,
    "handle": "ca-telefunken-u48-stereo-set-8f94956955",
    "url": "https://envoy-music.myshopify.com/products/ca-telefunken-u48-stereo-set-8f94956955",
    "catalog_product_id": "catalog:6b87fe915ddb",
    "lane": "studio",
    "product_object": "stereo microphone pair"
  },
  "offer": {
    "price": 29895.0,
    "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":"Type","value":"Large-diaphragm vacuum tube condenser microphone (matched pair)","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"polar_patterns","label":"Polar Patterns","value":"Cardioid, Figure-8","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"capsule","label":"Capsule","value":"TELEFUNKEN M7, center-terminated large diaphragm","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"tube","label":"Vacuum Tube","value":"TELEFUNKEN Elektroakustik VF14K","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"transformer","label":"Output Transformer","value":"TELEFUNKEN Elektroakustik BV8","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"matching","label":"Pair Matching","value":"Hand-selected components; capsules tuned to each other; transformers and tubes tested for matched gain and frequency response","source":"https:\/\/www.altomusic.com\/products\/telefunken-u48-matched-stereo-set-u48stereoset","confidence":0.9}]},{"id":"performance","label":"Performance (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\/u48\/","confidence":0.98},{"key":"sensitivity","label":"Sensitivity","value":"24.5 mV\/Pa, ±1 dB","unit":"mV\/Pa","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"thd","label":"THD @ 1 kHz at 1 Pa","value":"\u003c 0.3%","unit":"%","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"output_impedance","label":"Output Impedance","value":"200","unit":"Ω","display":"200 Ω","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"max_spl","label":"Maximum SPL (1% THD)","value":"127","unit":"dB","display":"127 dB","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"snr","label":"Signal-to-Noise Ratio","value":"85","unit":"dBA","display":"85 dBA","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98},{"key":"self_noise","label":"Self Noise","value":"9","unit":"dBA","display":"9 dBA","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.98}]},{"id":"physical","label":"Physical (per microphone)","fields":[{"key":"dimensions","label":"Dimensions","value":"240 mm length × 60 mm diameter","unit":"mm","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.95},{"key":"weight","label":"Weight","value":"620","unit":"g","display":"620 g","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.95},{"key":"power","label":"Power Source","value":"External power supply (M 940HS dual supply in stereo set)","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.95}]},{"id":"included","label":"In the Box","fields":[{"key":"microphones","label":"Microphones","value":"2 × matched U48 tube condenser microphones","source":"https:\/\/www.economik.com\/products\/u48-stereo-set","confidence":0.97},{"key":"power_supply","label":"Power Supply","value":"M 940HS dual-channel power supply (powers both microphones)","source":"https:\/\/www.telefunken-elektroakustik.com\/product\/u48\/","confidence":0.97},{"key":"cables","label":"Cables","value":"2 × M 840TH Sommer tube microphone cables, 10 m","source":"https:\/\/www.economik.com\/products\/u48-stereo-set","confidence":0.95},{"key":"shock_mounts","label":"Shock Mounts","value":"2 × M 740 elastic shock mounts","source":"https:\/\/www.economik.com\/products\/u48-stereo-set","confidence":0.95},{"key":"cases","label":"Storage","value":"2 × WB40 wooden microphone boxes; FC40S locking flight case","source":"https:\/\/www.economik.com\/products\/u48-stereo-set","confidence":0.95}]}]},
  "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": "Studios and engineers recording stereo sources — orchestral, chamber, choir, piano, drum overheads, room ambience — who want a factory-matched pair of U47-style tube microphones. The cardioid + figure-8 pattern set makes it directly usable for Blumlein and mid-side (M\/S) arrays as well as X\/Y and spaced-pair techniques.",
    "who_should_skip": "Anyone who needs an omnidirectional pattern for stereo work — the U48 offers cardioid and figure-8 only, whereas Telefunken's U47 pairs cardioid with omni. Also skip if you need phantom-powered, grab-and-go mics: each U48 requires the dedicated external power supply and special 10 m tube cable, and each mic weighs 620 g at 240 mm long. Buyers who only ever record mono sources are paying for matching they won't use.",
    "fit_notes": "Each U48 uses the same M7 capsule, VF14K tube, and BV8 transformer as Telefunken's U47 reissue; the difference is the pattern pair (cardioid\/figure-8 vs cardioid\/omni). The stereo set's components are hand-selected and matched — capsules tuned to each other, tubes and transformers tested for matched gain and frequency response — which is what distinguishes it from buying two individual U48s. The included M 940HS dual supply powers both microphones from one unit, and everything ships in a single FC40S locking flight case. Per-mic specs: 20 Hz–20 kHz ±3 dB, 24.5 mV\/Pa sensitivity, 127 dB max SPL (1% THD), 9 dBA self-noise, 200 Ω output impedance.",
    "watchouts": "The Economik listing was marked currently unavailable at research time — confirm stock\/lead time before purchase. Per-microphone specifications above are taken from the manufacturer's single-U48 product page (the stereo set applies them per mic). One third-party aggregator summary circulated a 400 Ω output impedance figure, but the manufacturer and both retailers checked state 200 Ω — the manufacturer value is used here. Figure-8 is the only alternative pattern; there is no omni or pattern-sweep like on multi-pattern remote-control tube mics.",
    "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": "U48 Stereo Set is a recording and studio product represented by 1 current Canadian retailer offer, starting at 29895.00 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 U48 Stereo Set is a matched pair of U48 microphones with a dual power supply.",
    "intent_terms": ["studio","home_recording","content_creation","signal_chain","U48 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"]
}
}