{"sources":[{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","type":"listing","url":"https://prod-jbhifi.myshopify.com/products.json","retrieval_at":"2026-10-05T19:02:44.519Z","source_hash":"1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","access_verdict":"permitted","robots_result":"allow"}],"summaries":[],"facts":[{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:0","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Driver and operating principle","ordinal":0,"value_number":null,"unit":null,"value_text":"Uses a dynamic transducer in a closed-back design.","original_value":"Transducer Type Dynamic Operating principle Closed","confidence":0.95,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":336,"end":386,"summary_id":null,"excerpt_id":null,"span_sha256":"5d875d5ddba8dadeebbcf1fe6f9b2a7a98c468a18705d327f46f4ddf99190e5c","source_locator":"characters 336 to 386 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:1","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Ear coupling","ordinal":1,"value_number":null,"unit":null,"value_text":"The headphones are circumaural, sitting around the ear.","original_value":"Sound coupling to the ear Circumaural","confidence":0.95,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":387,"end":424,"summary_id":null,"excerpt_id":null,"span_sha256":"9ed7cf23c7ea5f9023399a21a16505df87087b2d67e8f40e12c110ea6cfc392a","source_locator":"characters 387 to 424 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:2","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Impedance","ordinal":2,"value_number":null,"unit":null,"value_text":"Nominal impedance is 30 ohms.","original_value":"Nominal impedance 30 ohms","confidence":0.95,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":459,"end":484,"summary_id":null,"excerpt_id":null,"span_sha256":"b53fd3507c34e800a15ea194f87d67f46c6449f9d17388773965e01440e69608","source_locator":"characters 459 to 484 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:3","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Sound pressure level","ordinal":3,"value_number":null,"unit":null,"value_text":"Nominal sound pressure level is 95 dB SPL at 1 mW / 500 Hz and 110 dB SPL at 1 V / 500 Hz.","original_value":"Nominal sound pressure level @1 mW / 500 Hz 95 dB SPL Nominal sound pressure level @1 V / 500 Hz 110 dB SPL","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":485,"end":592,"summary_id":null,"excerpt_id":null,"span_sha256":"77957a67379123dfabae899ad517d2e5a6e5fbbb1390c573cdd372eff3eb51d5","source_locator":"characters 485 to 592 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:4","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Maximum input power","ordinal":4,"value_number":null,"unit":null,"value_text":"Short-term maximum input power is 100 mW.","original_value":"Short term maximum input power 100 mW","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":633,"end":670,"summary_id":null,"excerpt_id":null,"span_sha256":"7479980fdc8fef749c5355223a13f2b54524b6998cbe029022c9147ed6a3adb5","source_locator":"characters 633 to 670 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:5","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Ambient noise attenuation","ordinal":5,"value_number":null,"unit":null,"value_text":"Ambient noise attenuation is 25 dB A.","original_value":"Ambient noise attenuation 25 dB A","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":671,"end":704,"summary_id":null,"excerpt_id":null,"span_sha256":"38cc902a82db9a3f709a62aa4ce9657b8bee945d9ab04238cba2e2f4405d4511","source_locator":"characters 671 to 704 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:6","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Clamping force","ordinal":6,"value_number":null,"unit":null,"value_text":"Clamping force is 6 ± 0.5 N.","original_value":"Clamping force 6 ±0,5 N","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":705,"end":728,"summary_id":null,"excerpt_id":null,"span_sha256":"46a86e3b42c0a49172a9d84c112073d62730b9bcbe22a0f074bbe5f34418326d","source_locator":"characters 705 to 728 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:7","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"Weight","ordinal":7,"value_number":null,"unit":null,"value_text":"The headphone weighs 377 g without the cable.","original_value":"Weight (without cable) 377 g","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":729,"end":757,"summary_id":null,"excerpt_id":null,"span_sha256":"9a5310fc1c22e51c61c5931158fa389d2576182a37e6af39a755b780dfaf61cb","source_locator":"characters 729 to 757 of the retained text"}},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:fact:8","source_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing","field":"What is included","ordinal":8,"value_number":null,"unit":null,"value_text":"Box contents are the headphones, two sets of ear pads (velours and leatherette), a 3 m straight cable and a 5 m coiled cable with 3-pin mini XLR connector, a premium hardcase and instructions.","original_value":"Scope of delivery Closed-back headphones DT 1770 PRO MKII Two sets of ear pads: velours and leatherette 3m straight cable & 5m coiled cable with 3-pin mini XLR connector Premium hardcase Instructions","confidence":0.9,"citation":{"lineage_tier":"T1","artefact_id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:quick:source:0:listing:artefact:1baa8e058139d109ed76964e6774e068a55726ae088664159c4e7c8bd93ecbae","start":758,"end":957,"summary_id":null,"excerpt_id":null,"span_sha256":"95b83d3d33430cb444dabf05c0b3d7444842b394c8bdaf64c7ffeb6e8d8a46df","source_locator":"characters 758 to 957 of the retained text"}}],"facet_texts":[],"gaps":[{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:gap:facets:1","source_type":"facets","url":null,"reason":"embeddings skipped in the store-data batch","detail":"the store-data batch makes no embedding call of any kind; this pack has no facet texts and no vectors","recorded_at":"2026-10-06T02:56:15.170Z"},{"id":"jbhifi-com-au--beyerdynamic-dt-1770-pro-mkii-studio-headphone:pack:1:gap:listing:0","source_type":"listing","url":"https://prod-jbhifi.myshopify.com/products.json","reason":"facts dropped: quote not found in the store's own data","detail":"1 fact the batch turn wrote was dropped because its quote was not found word for word in the store's own text, by Ash's 23-Sep-2026 ruling (topics: Frequency response).","recorded_at":"2026-10-06T02:56:15.170Z"}],"facet_check":null,"evidence_depth":{"note":"Store data: every fact here was written from the product data the store itself publishes (title, vendor, product type, variants, tags and description), as RoboTrunk holds it, and each fact's quote was found word for word in that text. No outside source was read and no web search was made. The grader then checked each fact against that text. A deeper read with outside sources may follow later.","depth":"store_data","model":"deepseek-flash","sources":[{"url":"https://prod-jbhifi.myshopify.com/products.json","role":"the store's own product data","retained":true}],"batch_id":"store-data:jbhifi-com-au:2026-10-06T02-54-27-886Z:480","reasoning":"none","batch_size":10,"embeddings":"skipped in the store-data batch: no embedding call of any kind is made in this mode","merged_stores":[],"description_cut":false,"write_turn_timeout_minutes":10,"facts_dropped_quote_not_found":1}}