{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "JOHN HARDY Jensen Twin Servo 990 w\/ 3channels — Microphone",
    "brand": "JOHN HARDY",
    "model": "TWIN SERVO 990",
    "mpn": null,
    "gtins": null,
    "handle": "ca-john-hardy-jensen-twin-servo-990-w-3channels-afa5524dc9",
    "url": "https://envoy-music.myshopify.com/products/ca-john-hardy-jensen-twin-servo-990-w-3channels-afa5524dc9",
    "catalog_product_id": "catalog:4cf7ba469a32",
    "lane": "studio",
    "product_object": "microphone preamplifier"
  },
  "offer": {
    "price": 4999.0,
    "currency": "CAD",
    "available": true,
    "condition": "Brand New",
    "price_band": "high",
    "source_verified_at": "2026-07-10T23:56:52Z"
  },
  "specifications": {"category":"studio","subcategory":"studio","category_path":"studio","groups":[{"id":"format","label":"Format","fields":[{"key":"product_type","label":"Product type","value":"Transformer-coupled rackmount microphone preamplifier","display":"Transformer-coupled rackmount microphone preamplifier","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"configuration","label":"Configuration","value":"3-channel configuration in a mainframe that supports 1 to 4 channels","display":"3-channel configuration in a mainframe that supports 1 to 4 channels","source":"John Hardy Jensen Twin Servo 990 product page and input model","confidence":0.7},{"key":"rack_format","label":"Rack format","value":"1U 19-inch rackmount","display":"1U 19-inch rackmount","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"gain_range","label":"Gain range","value":"16 to 60 dB","display":"16 to 60 dB","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9}]},{"id":"circuit_and_controls","label":"Circuit and Controls","fields":[{"key":"input_transformer","label":"Input transformer","value":"Jensen JT-16-B","display":"Jensen JT-16-B","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"op_amps","label":"Op amps","value":"Two 990C discrete op-amp modules per channel","display":"Two 990C discrete op-amp modules per channel","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"output_transformer","label":"Output transformer","value":"Jensen JT-11-BMQ","display":"Jensen JT-11-BMQ","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"standard_controls","label":"Standard controls","value":"Gain, 20 ohm mic or 20 dB pad switch, polarity reverse, phantom power, ground lift and LED metering","display":"Gain, 20 ohm mic or 20 dB pad switch, polarity reverse, phantom power, ground lift and LED metering","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9}]},{"id":"performance","label":"Performance","fields":[{"key":"ein","label":"Ein","value":"-128.7 dBu, 20 Hz-20 kHz unweighted, 60 dB gain, 150 ohm source","display":"-128.7 dBu, 20 Hz-20 kHz unweighted, 60 dB gain, 150 ohm source","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"frequency_response","label":"Frequency response","value":"20 Hz and 20 kHz: -0.05 dB typical, -0.1 dB max; -3 dB at 0.4 Hz and 140 kHz","display":"20 Hz and 20 kHz: -0.05 dB typical, -0.1 dB max; -3 dB at 0.4 Hz and 140 kHz","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"thd","label":"Thd","value":"0.001% typical, 0.003% max at +4 dBu output, 100 Hz-20 kHz","display":"0.001% typical, 0.003% max at +4 dBu output, 100 Hz-20 kHz","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"input_impedance","label":"Input impedance","value":"1.27 kOhms","display":"1.27 kOhms","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"phantom_power","label":"Phantom power","value":"+52 VDC, 9.5 mA maximum","display":"+52 VDC, 9.5 mA maximum","source":"John Hardy Jensen Twin Servo 990 product page","confidence":0.9},{"key":"max_output_level","label":"Max output level","value":"+24 dBu into 75 ohm load","display":"+24 dBu into 75 ohm load","source":"John Hardy Jensen Twin Servo 990 product page","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": "Engineers needing a high-headroom transformer-coupled multi-channel mic preamp with low measured noise and distortion.",
    "who_should_skip": "Users wanting integrated EQ\/compression, digital conversion, remote control or a compact desktop interface-style preamp.",
    "fit_notes": "The John Hardy mainframe supports 1 to 4 channels; confirm the installed channel count is three when matching this canonical.",
    "watchouts": "GTIN and weight were not found in accessible manufacturer data; channel count is configuration-dependent rather than a separate base model.",
    "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": "Jensen Twin Servo 990 w\/ 3channels is a recording and studio product represented by 1 current Canadian retailer offer, starting at 4999.00 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": "JOHN HARDY Jensen Twin Servo 990 w\/ 3channels — Microphone. jensen TWIN SERVO 990. visible colors: black, white. visible controls: knobs, switches. panel text: jensen; TWIN SERVO; 990 MIC PREAMP; POWER.",
    "intent_terms": ["studio","home_recording","content_creation","signal_chain","Jensen Twin Servo 990 w\/ 3channels","JOHN HARDY","Multi-Channels Mic-Preamp","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": {"specifications":{"source_url":"http:\/\/www.johnhardyco.com\/JTS990Details.html","method":"gear_universe_read_model","fetched":"2026-07-21"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","lane:studio","verified retail listing_reference"]
}
}