{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "HERITAGE AUDIO HA670N",
    "brand": "HERITAGE AUDIO",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "ca-heritage-audio-ha670n-a005140e2f",
    "url": "https://envoy-music.myshopify.com/products/ca-heritage-audio-ha670n-a005140e2f",
    "catalog_product_id": "catalog:ffa3116890d7",
    "lane": "studio",
    "product_object": "tube compressor\/limiter"
  },
  "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":"Stereo tube compressor\/limiter","display":"Stereo tube compressor\/limiter","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"compression_type","label":"Compression type","value":"Vari-Mu","display":"Vari-Mu","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"operation_modes","label":"Operation modes","value":"Dual mono\/stereo plus LAT\/VERT mid\/side operation","display":"Dual mono\/stereo plus LAT\/VERT mid\/side operation","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"controls","label":"Controls","value":"Stepped controls, independent bypass per channel, side-chain filtering, output gain make-up and Progressive DC Threshold","display":"Stepped controls, independent bypass per channel, side-chain filtering, output gain make-up and Progressive DC Threshold","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9}]},{"id":"circuit","label":"Circuit","fields":[{"key":"tubes","label":"Tubes","value":"4 NOS military-grade 6BA6 tubes","display":"4 NOS military-grade 6BA6 tubes","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"transformers","label":"Transformers","value":"6 custom-made transformers","display":"6 custom-made transformers","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"output_stage","label":"Output stage","value":"Transformer-coupled HA-880 op-amp output stage per channel","display":"Transformer-coupled HA-880 op-amp output stage per channel","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"time_constants","label":"Time constants","value":"6 attack and release times matching original units","display":"6 attack and release times matching original units","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9}]},{"id":"electrical","label":"Electrical","fields":[{"key":"input_impedance","label":"Input impedance","value":"15 kOhms","display":"15 kOhms","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"output_impedance","label":"Output impedance","value":"50 Ohms","display":"50 Ohms","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"max_output_level","label":"Max output level","value":"+29 dBu","display":"+29 dBu","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"frequency_response","label":"Frequency response","value":"20 Hz-20 kHz +\/-0.5 dB","display":"20 Hz-20 kHz +\/-0.5 dB","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"self_noise","label":"Self noise","value":"Less than -78 dBu","display":"Less than -78 dBu","source":"Heritage Audio HERCHILD Next Gen Model 670N product page","confidence":0.9},{"key":"harmonic_distortion","label":"Harmonic distortion","value":"Less than 0.5% up to +24 dBu output, no compression","display":"Less than 0.5% up to +24 dBu output, no compression","source":"Heritage Audio HERCHILD Next Gen Model 670N 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": "Mixing and mastering setups needing stereo Vari-Mu dynamics with side-chain filtering, mid\/side operation and independent channel bypass.",
    "who_should_skip": "Users needing a mono channel compressor, a transparent VCA-only dynamics unit, or compact 500-series module dimensions.",
    "fit_notes": "Offer identifiers use HA670N while the manufacturer product name is HERCHILD Next Gen Model 670N.",
    "watchouts": "Accessible sources conflict or omit reliable full chassis dimensions\/weight; those fields are left unknown rather than using inconsistent values.",
    "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": "HA670N 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": "HERITAGE AUDIO HA670N. HERITAGE AUDIO MODEL 670N. visible colors: black, red, white, cream. visible controls: rotary knobs, toggle switches, push button. panel text: LEFT BYPASS; OFF ON; ZERO; BAL; LEFT - LAT INPUT GAIN; LEFT - LAT AC THRESHOLD; LEFT - LAT DC THRESHOLD; LEFT - LAT TIME CONST; LEFT - LAT OUTPUT; LEFT - LAT SC FILTER; AGC; IND.",
    "intent_terms": ["studio","home_recording","content_creation","signal_chain","HA670N","HERITAGE AUDIO","500 Series EQs\/Compressors","verified retail listing","recording and studio product","home recording","content creation","signal chain"],
    "use_cases": ["studio-recording","sound-design"],
    "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":"https:\/\/heritageaudio.com\/herchild-next-gen-model-670n\/","method":"gear_universe_read_model","fetched":"2026-07-21"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","lane:studio","verified retail listing_reference"]
}
}