{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "API 550A 500 Series 3-Band Equalizer Module 2007 - Present - Black",
    "brand": "API",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-api-550a-500-series-3-band-equalizer-module-api-550a-500-series-3-band-543a0209",
    "url": "https://envoy-music.myshopify.com/products/gm-api-550a-500-series-3-band-equalizer-module-api-550a-500-series-3-band-543a0209",
    "catalog_product_id": "product_662db13f543a0209",
    "lane": "studio",
    "product_object": "equalizers"
  },
  "offer": {
    "price": 1363.15,
    "currency": "CAD",
    "available": true,
    "condition": "Very Good",
    "price_band": "high",
    "source_verified_at": null
  },
  "specifications": {"type":"json","groups":[{"name":"Product facts","fields":[{"label":"Specifications Input Impedance","value":"66 kΩ high level 17 kΩ low level","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Output Impedance","value":"Less than 85Ω (transformer isolated)","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Nominal Operating Level","value":"–15 dBm to +12 dBm","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Insertion Loss","value":"None (bridging)","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Frequency Response, Unequalized","value":"±0.5 dB 30 Hz to 20 kHz","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Noise","value":"Unequalized, output noise of –90 dBm, high level strapping and –98 dBm, low level strapping, 20 Hz to 20 kHz unweighted","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Distortion","value":".05% THD max, 30 Hz to 20 kHz @ +4 dBm .07% THD max, 30 Hz to 20 kHz @ +18 dBm","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Clipping Level (3% THD)","value":"+30 dBm","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Toggle Switch","value":"50 Hz to 15 kHz band-pass filter In or out Push Button: LF range Peak or Shelf Push Button: HF range Peak or Shelf Push Button: Equalization In or Out Tally light when In","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Connector","value":"30 pin PC connector supplied","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"550A Discrete 3 Band EQ - API","value":"Automated Processes, Inc.","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Dual Concentric Rotary","value":"LF select: 30, 40, 50, 100, 200, 300,","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"}]},{"name":"Format and size","fields":[{"label":"Size","value":"1.5″ X 5.25″ X 7.75″ Deep","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Size (Boxed for Shipping)","value":"4.5″ X 6.25″ X 10.25″","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Actual Weight","value":"2 lbs.","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Shipping Weight","value":"2.53 lbs.","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"}]},{"name":"Power","fields":[{"label":"Power Requirement","value":"±15 volts to ±18 volts @ 70 ma","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Power","value":"3122V 2-Channel Mic Preamp 3124V M","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"},{"label":"Current draw","value":"70 ma Controls: Dual Concentr","source":"https:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/"}]}]},
  "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": "API 550A 500 Series 3-Band Equalizer Module 2007 - Present - Black. API. 550A 500 Series 3-Band Equalizer Module. Pro Audio. Pro Audio \/ Outboard Gear \/ Equalizers Pro Audio \/ 500 Series. available from reverb. price range 995 USD. condition Very Good. Showing a little bit of wear on the left side but not much, overall great condition!. API 550A 500 Series 3-Band Equalizer Module 2007 - Present - Black. API. 550A 500 Series 3-Band Equalizer Module. Black. Very Good. Pro Audio. Pro Audio \/ Outboard Gear \/ Equalizers Pro Audio \/ 500 Series. Showing a little bit of wear on the left side but not much, overall great condition!. Metro Modular. Los Angeles, CA, United States. tags source:reverb family:pro_audio listing_status:live brand:api model:550a_500_series_3_band_equalizer_module category:pro_audio_outboard_gear_equalizers category:pro_audio_500_series price_band:mid segment:intermediate condition:very_good has:photos",
    "agent_summary": "API 550A 500 Series 3-Band Equalizer Module is a aimed at intermediate players pro audio listing with marketplace-sourced data. API 550A 500 Series 3-Band Equalizer Module 2007 - Present - Black currently sits around 995 USD. Showing a little bit of wear on the left side but not much, overall great condition! 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": ["API 550A 500 Series 3-Band Equalizer Module 2007 - Present - Black","API","550A 500 Series 3-Band Equalizer Module","Pro Audio","Pro Audio \/ Outboard Gear \/ Equalizers","Pro Audio \/ 500 Series","brand:api","category:pro_audio_500_series","category:pro_audio_outboard_gear_equalizers","condition:very_good","family:pro_audio","has:photos","listing_status:live","model:550a_500_series_3_band_equalizer_module","price_band:mid","segment:intermediate","source:reverb","brand api","category pro audio 500 series","category pro audio outboard gear equalizers","condition very good","family pro audio","has photos","listing status live","model 550a 500 series 3 band equalizer module","price band mid","segment intermediate","source reverb","live-performance","tone-shaping","signal-chain","Metro Modular","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","sound-design"],
    "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:\/\/apiaudio.com\/product\/550a-discrete-3-band-eq\/","method":"gear_universe_read_model","fetched":"2026-07-30"}}
  },
  "related": {
    "similar_item_ids": ["product_5396398db77b2624","product_c6e276bde9d7c97f","product_bc8188add9a3700d","product_1647a70cbddb405f"],
    "comparison_reasons": ["source_count:1","family:Pro Audio","marketplace_only","identity_confidence:0.9"]
,
    "related_products": [{ "title": "API 312 500 Series Mic Preamp Module 2020 - Present - Black", "url": "https://envoy-music.myshopify.com/products/gm-api-312-500-series-mic-preamp-module-api-312-500-series-mic-preamp-mod-b77b2624", "handle": "gm-api-312-500-series-mic-preamp-module-api-312-500-series-mic-preamp-mod-b77b2624" },{ "title": "API 500-6B HC Lunchbox 6-Slot Powered 500 Series Frame 2011 - Present - Black", "url": "https://envoy-music.myshopify.com/products/gm-api-500-6b-hc-lunchbox-6-slot-powered-500-series-frame-api-500-6b-hc-l-e9d7c97f", "handle": "gm-api-500-6b-hc-lunchbox-6-slot-powered-500-series-frame-api-500-6b-hc-l-e9d7c97f" },{ "title": "API 500-6B Lunchbox 6-Slot Powered 500 Series Frame", "url": "https://envoy-music.myshopify.com/products/gm-api-500-6b-lunchbox-6-slot-powered-500-series-frame-api-500-6b-lunchbo-d9a3700d", "handle": "gm-api-500-6b-lunchbox-6-slot-powered-500-series-frame-api-500-6b-lunchbo-d9a3700d" },{ "title": "API 512c 500 Series Mic Preamp", "url": "https://envoy-music.myshopify.com/products/gm-api-512c-api-512c-500-series-mic-preamp-bddb405f", "handle": "gm-api-512c-api-512c-500-series-mic-preamp-bddb405f" }]}
}