{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "Vintage Western Electric 618A Dynamic Microphone",
    "brand": "Western Electric",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-western-electric-618a-vintage-western-electric-618a-dynamic-microphone-ad062384",
    "url": "https://envoy-music.myshopify.com/products/gm-western-electric-618a-vintage-western-electric-618a-dynamic-microphone-ad062384",
    "catalog_product_id": "product_6bc985f1ad062384",
    "lane": "studio",
    "product_object": "dynamic microphone"
  },
  "offer": {
    "price": 684.99,
    "currency": "CAD",
    "available": true,
    "condition": "Very Good",
    "price_band": "mid",
    "source_verified_at": null
  },
  "specifications": {"type":"json","groups":[{"name":"Product facts","fields":[{"label":"Audio resolution","value":"15 kHz","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618\/"},{"label":"Manufacturer","value":"Western Electric","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Type","value":"Moving Coil","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Directionality","value":"Omnidirectional","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Frequency response range","value":"35 to 9,500 cycles per second","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Electrical impedance at low frequencies","value":"approximately 28 ohms with a phase angle of nearly zero degrees","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Electrical impedance at 10,000 cycles per second","value":"about 38 ohms with a phase angle of about 20 degrees","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Output level","value":"For a person speaking with normal conversational intensity at a distance of three feet, an output level of –84 dB relative to a zero level of six milliwatts is representative","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Diaphragm material","value":"thin duralumin","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Magnet type","value":"permanent magnet made from a high grade cobalt steel alloy","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"},{"label":"Coil material","value":"aluminum ribbon","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618a\/"}]},{"name":"Format and size","fields":[{"label":"Format","value":"Eurorack","source":"https:\/\/envoy-music.myshopify.com\/products\/gm-western-electric-618a-vintage-western-electric-618a-dynamic-microphone-ad062384"}]},{"name":"Power","fields":[{"label":"Power","value":"728 VINTAGE TECHNOLOGY ARCHIVE \/ 07","source":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618\/"}]}]},
  "connectivity": null,
  "power": null,
  "included_items": null,
  "required_accessories": ["appropriate cables","monitoring solution","mount or stand if relevant"],
  "optional_accessories": null,
  "compatibility": null,
  "advisor": {
    "best_for": "Players matching the published factory\/retail specs listed above.",
    "who_should_skip": null,
    "fit_notes": "Verify power, format, and connectivity against your rig before purchase; only sourced fields are listed.",
    "watchouts": "Unsourced claims are omitted. Listing-specific mods, kits, or incomplete units may not match the base model specs.",
    "verification_questions": ["Can you confirm exactly what is included in the sale and show it in current photos?","Are there any functional issues, repairs, or missing parts not shown in the listing?","Can you provide close-up photos of wear points, serial numbers, and any modifications?","Can you confirm the core specs that matter for compatibility in this setup?","Is this still available and has anything changed since the listing was posted?"]
  },
  "retrieval": {
    "summary": "Vintage Western Electric 618A Dynamic Microphone. Western Electric. 618A. Pro Audio. Pro Audio. available from reverb. price range 499.99 USD. condition Very Good. Tested and Working. This was pulled from a working environment. Please look at all pictures before purchasing, only what is included in pictures is included in sale. Will ship same day purchased in a professionally packaged box. Bin360. Vintage Western Electric 618A Dynamic Microphone. Western Electric. 618A. . Very Good. Pro Audio. Pro Audio. Tested and Working. This was pulled from a working environment. Please look at all pictures before purchasing, only what is included in pictures is included in sale. Will ship same day purchased in a professionally packaged box. Bin360. BGS. Huntington Beach, CA, United States. tags source:reverb family:pro_audio listing_status:live brand:western_electric model:618a category:pro_audio price_band:mid segment:intermediate condition:very_good has:photos",
    "agent_summary": "Western Electric 618A is a aimed at intermediate players pro audio listing with marketplace-sourced data. Vintage Western Electric 618A Dynamic Microphone currently sits around 499.99 USD. Tested and Working. Marketplace data is richer on listing context, but it needs more buyer verification. Good visual coverage for spot-checking the item. Marketplace listing quality varies by seller, so condition and included items still need verification.",
    "intent_terms": ["Vintage Western Electric 618A Dynamic Microphone","Western Electric","618A","Pro Audio","brand:western_electric","category:pro_audio","condition:very_good","family:pro_audio","has:photos","listing_status:live","model:618a","price_band:mid","segment:intermediate","source:reverb","brand western electric","category pro audio","condition very good","family pro audio","has photos","listing status live","model 618a","price band mid","segment intermediate","source reverb","home-recording","content-creation","live-performance","tone-shaping","signal-chain","BGS","Best suited to players who have outgrown their first setup and need a meaningful step up.","Shoppers who already understand the role of this pro audio and want a more deliberate purchase."],
    "use_cases": ["studio-recording","live-performance"],
    "skill_level": "pro"
  },
  "trust": {
    "has_verified_retail_listing": true,
    "source_count": 1,
    "source_tier_mix": ["marketplace"],
    "evidence_flags": {"has_description":true,"has_images":true,"has_reviews":false,"has_specs":false,"source_count":1},
    "spec_provenance": {"specifications":{"source_url":"https:\/\/vintagetechnologyarchive.com\/audio\/western-electric\/618\/","method":"gear_universe_read_model","fetched":"2026-07-30"}}
  },
  "related": {
    "similar_item_ids": ["product_bc11f2475f38fb4a","product_c7e68b74be0c1532"],
    "comparison_reasons": ["source_count:1","family:Pro Audio","marketplace_only","identity_confidence:0.9"]
}
}