{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "176 Tube Limiting Amplifier",
    "brand": "RETRO INSTRUMENTS",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "ca-retro-instruments-176-tube-limiting-amplifier-b00a3f6675",
    "url": "https://envoy-music.myshopify.com/products/ca-retro-instruments-176-tube-limiting-amplifier-b00a3f6675",
    "catalog_product_id": "catalog:22e74ac2573b",
    "lane": "studio",
    "product_object": "tube compressor limiter"
  },
  "offer": {
    "price": 5445.0,
    "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":"Mono tube variable-mu compressor\/limiter","display":"Mono tube variable-mu compressor\/limiter","source":"Retro Instruments product page and Vintage King listing","confidence":0.9},{"key":"channels","label":"Channels","value":"1","display":"1","source":"Vintage King Retro Instruments 176 listing","confidence":0.9},{"key":"rack_format","label":"Rack format","value":"2U 19-inch rackmount","display":"2U 19-inch rackmount","source":"Vintage King Retro Instruments 176 listing","confidence":0.7},{"key":"power","label":"Power","value":"IEC power connector, 115\/230 V AC mains","display":"IEC power connector, 115\/230 V AC mains","source":"Retro Instruments 176 product page","confidence":0.9}]},{"id":"compression","label":"Compression","fields":[{"key":"compression_type","label":"Compression type","value":"Variable-mu tube design","display":"Variable-mu tube design","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"ratios","label":"Ratios","value":"2:1, 4:1, 8:1 and 12:1","display":"2:1, 4:1, 8:1 and 12:1","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"attack_release","label":"Attack release","value":"Continuously variable attack and release time","display":"Continuously variable attack and release time","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"gain_reduction","label":"Gain reduction","value":"20 dB available gain reduction","display":"20 dB available gain reduction","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"stereo_strapping","label":"Stereo strapping","value":"Two or more units can be strapped for stereo operation","display":"Two or more units can be strapped for stereo operation","source":"Retro Instruments 176 product page","confidence":0.9}]},{"id":"controls_and_i_o","label":"Controls and I\/O","fields":[{"key":"sidechain_filter","label":"Sidechain filter","value":"Wide-range sidechain high-pass filter","display":"Wide-range sidechain high-pass filter","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"vocal_asymmetry","label":"Vocal asymmetry","value":"Vocal Asymmetry Tool","display":"Vocal Asymmetry Tool","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"bypass","label":"Bypass","value":"Hard-wire bypass and interstage transformer bypass","display":"Hard-wire bypass and interstage transformer bypass","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"metering","label":"Metering","value":"VU meter switchable between input, output and gain reduction","display":"VU meter switchable between input, output and gain reduction","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"connectors","label":"Connectors","value":"XLR input and output","display":"XLR input and output","source":"Retro Instruments 176 product page","confidence":0.9}]},{"id":"performance","label":"Performance","fields":[{"key":"signal_to_noise","label":"Signal to noise","value":"\u003e76 dB","display":"\u003e76 dB","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"frequency_response","label":"Frequency response","value":"Within 0.5 dB from 20 Hz to 20 kHz","display":"Within 0.5 dB from 20 Hz to 20 kHz","source":"Retro Instruments 176 product page","confidence":0.9},{"key":"harmonic_distortion","label":"Harmonic distortion","value":"Less than 1% from 0-15 dB gain reduction","display":"Less than 1% from 0-15 dB gain reduction","source":"Retro Instruments 176 product page","confidence":0.9}]}]},
  "connectivity": ["xlr"],
  "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": "Tracking and mix engineers needing a mono tube variable-mu limiter with selectable ratios, continuous timing controls and modern bypass\/linking features.",
    "who_should_skip": "Users needing stereo operation in one chassis, digital control, sidechain frequency recall by numeric detents, or a compact 500-series compressor.",
    "fit_notes": "Plan on a second unit for stereo-linked use; the transformer bypass and sidechain high-pass functions affect both behavior and tone.",
    "watchouts": "Manufacturer data provides performance specs but not full physical dimensions or weight; GTIN was not found.",
    "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": "176 Tube Limiting Amplifier is a recording and studio product represented by 1 current Canadian retailer offer, starting at 5445.00 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": "RETRO 176 LIMITING AMPLIFIER. visible colors: gray, black, red, white. visible controls: rotary knobs, toggle switches. panel text: INTEGRATE; ATTACK; OUTPUT; RELEASE; COMP RATIO; METER; INPUT; AMPLIFIER; RETRO; 176 LIMITING AMPLIFIER; ON; SLOW.",
    "intent_terms": ["studio","home_recording","content_creation","signal_chain","176 Tube Limiting Amplifier","RETRO INSTRUMENTS","Mono Compressors","verified retail listing","recording and studio product","home recording","content creation","signal chain"],
    "use_cases": null,
    "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:\/\/www.retroinstruments.com\/product.php?product_id=176","method":"gear_universe_read_model","fetched":"2026-07-21"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","lane:studio","verified retail listing_reference"]
}
}