{"accepted_at":"2026-10-07T18:09:47.707Z","analyses":[{"analysis_id":"rv_373abc0ad762f2a244280d4145eda72eb40e04f31de11202beb7f8da5b5a6cd5","analysis_type":"buyer_fit","claim_ids":["rv_953e85b2d942bf72e7403cacc5b5fd8670e195301ef3456fc1fa685f9c85f150","rv_9ddf049747a38f26065b772bb653a5fd847795f8777d2d65d4a58eb05eb5a50b","rv_27d954532c3e232a315a3445fbe6f995ccdd39a41abb704dd120fa4a4e586097","rv_6beace00b71278ce5836cc7e86f6cfd7db749702e6f24bd4c5cc2708197db3c6"],"confidence":0.85,"method":"Synthesis of re-read Sony documentation and scoped independent reviews.","summary":"Sony documents studio and broadcast use. Independent comfort observations differ, so evaluate fit on the actual unit and do not generalize an aged sample with replaced cushions to new stock.","title":"A conditional studio fit"}],"canonical_urls":{"de":"https://knowspec.com/de/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","en":"https://knowspec.com/en/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","es":"https://knowspec.com/es/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","fr":"https://knowspec.com/fr/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","ja":"https://knowspec.com/ja/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","pt-BR":"https://knowspec.com/pt-br/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/","th-TH":"https://knowspec.com/th-th/products/amazon-us/asin~b000ajif4e/sony-mdr-7506-professional-stereo-monitor-headphones/"},"content_hash":"sha256:023692ca134a9c5b8be7aa726b1d5fd414f453ec27fa17b1eb5354390db1e6e0","direct_answer":{"claim_ids":["cx7_eiaage","cx7_sonarcomfort","cx7_studio","diy_comfort"],"source_numbers":[],"text":"Sony documents studio and broadcast use. Independent comfort observations differ, so evaluate fit on the actual unit and do not generalize an aged sample with replaced cushions to new stock."},"facts":[{"predicate":"editorial.note","values":[{"claim_id":"cx7_dc","confidence":0.9,"conflicted":false,"region":null,"unit":null,"value":"DIY-Audio-Heaven measured 71 ohms DC resistance; this is not nominal AC impedance."},{"claim_id":"cx7_eiaage","confidence":0.9,"conflicted":false,"region":null,"unit":null,"value":"Explorations in Audio reviewed an aged MDR-7506 whose deteriorating original cushions were replaced; its listening impressions concern that sample."},{"claim_id":"cx7_spares","confidence":0.98,"conflicted":false,"region":"US/AEP","unit":null,"value":"The 2002 Sony service manual lists an ear-pad assembly among replacement parts; it does not establish current availability."}]},{"predicate":"product.buyer_fit","values":[{"claim_id":"cx7_sonarcomfort","confidence":0.85,"conflicted":false,"region":null,"unit":null,"value":"Most Sonarworks testers found the MDR-7506 comfortable for long sessions, while a minority reported pressure points."}]},{"predicate":"product.cable_length","values":[{"claim_id":"cx7_cable","confidence":0.98,"conflicted":false,"region":"US","unit":"m","value":3}]},{"predicate":"product.driver_size","values":[{"claim_id":"sony_driver_v7","confidence":0.98,"conflicted":false,"region":"US","unit":"mm","value":40}]},{"predicate":"product.frequency","values":[{"claim_id":"cx7_nominal_testfrequency","confidence":0.98,"conflicted":false,"region":"US/AEP historical manual","unit":"Hz","value":1000}]},{"predicate":"product.impedance","values":[{"claim_id":"cx7_ohms","confidence":0.98,"conflicted":false,"region":"US/AEP historical manual","unit":"ohm","value":63}]},{"predicate":"product.limitation","values":[{"claim_id":"diy_comfort","confidence":0.88,"conflicted":false,"region":null,"unit":null,"value":"Shallow ear-pad foam can reduce comfort."}]},{"predicate":"product.use_case","values":[{"claim_id":"cx7_studio","confidence":0.98,"conflicted":false,"region":"US","unit":null,"value":"Sony describes the MDR-7506 as intended for broadcast and studio environments."}]}],"gaps":[{"buyer_meaning":"","field":"topic:frequency_response","reason":"not_found"},{"buyer_meaning":"","field":"topic:repairability","reason":"not_found"},{"buyer_meaning":"","field":"topic:build_quality","reason":"not_found"},{"buyer_meaning":"","field":"topic:isolation_and_leakage","reason":"not_found"},{"buyer_meaning":"","field":"topic:distortion","reason":"not_found"},{"buyer_meaning":"","field":"topic:battery_life","reason":"not_found"},{"buyer_meaning":"","field":"topic:limitations","reason":"not_found"}],"generated_from":{"dossier_revision_id":"research_source_38059ae96e9a69265ed89ea9c448ad22_dossier","publisher_version":"publisher-v3-foundation"},"identity":{"asin":"B000AJIF4E","brand":null,"marketplace":"amazon_us","product_name":"Sony MDR-7506 Professional Stereo Monitor Headphones"},"license":"https://creativecommons.org/licenses/by/4.0/","pricing_v7":{"selection":{"cutoff":null,"entries":[],"evaluated_at":"2026-10-07T18:43:41.414Z","lowest_by_group":{},"policy_version":"offer-selection-v2.1"},"selection_id":"price_selection_6b293e98acbcff52d866bec439231bf31c65804d732eb6a7e7067e335256befe"},"public_entity_id":"product_public_a55ebfd5d71a4c888b8bc1f1453ce00c","quality":null,"research_hash":"sha256:eaf5c1546f1fb05a68a811e5de1aa5c3a07506b0ba18c8ecb03358a2a579f84e","schema_version":"knowspec-research-export-v2","source_hash":"sha256:938d6a174d5df204a8b2abef45d10754c874a5a7277e9cf13754a1922c6e3c1a","source_research":{"archetype":"experience","attestation":{"evidence_edges_traceable":true,"gaps_not_invented":true,"identity_not_mutated":true,"public_sources_only":true},"completed_at":"2026-09-27T18:09:37.791Z","evidence":{"capability_conditions":[],"claims":[{"calculation_method":null,"claim_id":"cx7_studio","confidence":0.98,"evidence_snippet":"broadcast and studio environments.","method":"observed","predicate":"product.use_case","region":"US","spec_origin":"datasheet","status":"asserted","topic_id":"buyer_fit","value":{"kind":"string","unit":null,"value":"Sony describes the MDR-7506 as intended for broadcast and studio environments."}},{"calculation_method":null,"claim_id":"sony_driver_v7","confidence":0.98,"evidence_snippet":"A 40mm PET diaphragm","method":"observed","predicate":"product.driver_size","region":"US","spec_origin":"datasheet","status":"asserted","topic_id":"experience_quality","value":{"display_unit":"mm","kind":"number","unit":"mm","value":40}},{"calculation_method":null,"claim_id":"diy_comfort","confidence":0.88,"evidence_snippet":"Unfortunately this headphone is not really comfortable due to the thickness of the foam.","method":"observed","predicate":"product.limitation","region":null,"spec_origin":null,"stance":"negative","status":"asserted","topic_id":"comfort_usability","value":{"kind":"string","unit":null,"value":"Shallow ear-pad foam can reduce comfort."}},{"calculation_method":null,"claim_id":"cx7_ohms","confidence":0.98,"evidence_snippet":"Impedance 63 ohms at 1 kHz","method":"observed","predicate":"product.impedance","region":"US/AEP historical manual","spec_origin":"manual","status":"asserted","topic_id":"amplifier_requirements","value":{"display_unit":"Ω","kind":"number","unit":"ohm","value":63}},{"calculation_method":null,"claim_id":"cx7_dc","confidence":0.9,"evidence_snippet":"Impedance: 71Ω (DC resistance, measured)","method":"observed","predicate":"editorial.note","region":null,"spec_origin":null,"status":"asserted","topic_id":"amplifier_requirements","value":{"kind":"string","unit":null,"value":"DIY-Audio-Heaven measured 71 ohms DC resistance; this is not nominal AC impedance."}},{"calculation_method":null,"claim_id":"cx7_sonarcomfort","confidence":0.85,"evidence_snippet":"Most of our testers find them to be very comfortable and suitable for long sessions.","method":"observed","predicate":"product.buyer_fit","region":null,"spec_origin":null,"status":"asserted","topic_id":"comfort_usability","value":{"kind":"string","unit":null,"value":"Most Sonarworks testers found the MDR-7506 comfortable for long sessions, while a minority reported pressure points."}},{"calculation_method":null,"claim_id":"cx7_eiaage","confidence":0.9,"evidence_snippet":"the soft black imitation leather ear pads were starting to disintegrate from old age.","method":"observed","predicate":"editorial.note","region":null,"spec_origin":null,"status":"asserted","topic_id":"build_quality","value":{"kind":"string","unit":null,"value":"Explorations in Audio reviewed an aged MDR-7506 whose deteriorating original cushions were replaced; its listening impressions concern that sample."}},{"calculation_method":null,"claim_id":"cx7_spares","confidence":0.98,"evidence_snippet":"X-2113-124-1 PAD ASSY, EAR","method":"observed","predicate":"editorial.note","region":"US/AEP","spec_origin":null,"status":"asserted","topic_id":"repairability","value":{"kind":"string","unit":null,"value":"The 2002 Sony service manual lists an ear-pad assembly among replacement parts; it does not establish current availability."}},{"calculation_method":null,"claim_id":"cx7_cable","confidence":0.98,"evidence_snippet":"7506 Yes 3m / Coiled Yes","method":"observed","predicate":"product.cable_length","region":"US","spec_origin":"datasheet","status":"asserted","topic_id":"connectivity_and_codec_support","value":{"display_unit":"m","kind":"number","unit":"m","value":3}},{"calculation_method":null,"claim_id":"cx7_nominal_testfrequency","confidence":0.98,"evidence_snippet":"Impedance 63 ohms at 1 kHz","method":"observed","predicate":"product.frequency","region":"US/AEP historical manual","spec_origin":"manual","status":"asserted","topic_id":"amplifier_requirements","value":{"display_unit":"kHz","kind":"number","unit":"Hz","value":1000}}],"compatibility_cases":[],"coverage":{"capability_conditions":{"claim_ids":["cx7_studio","cx7_ohms","cx7_dc"],"reason":"Reviewed Sony documentation and independent tests for studio role, electrical quantities and fit. Exact hardware revisions and source-equipment guarantees remain unknown.","status":"partial"},"compatibility_cases":{"claim_ids":["cx7_ohms","cx7_dc"],"reason":"Read the nominal impedance and measured DC resistance, plus independent source-equipment discussion; no exact current phone or interface combination is established as a fully tested case.","status":"partial"},"discrepancies":{"claim_ids":["diy_comfort","cx7_sonarcomfort","cx7_ohms","cx7_dc"],"reason":"Contrary independent comfort experiences recorded. Nominal AC impedance and measured DC resistance are different quantities, not a proven specification conflict.","status":"partial"},"known_issues":{"claim_ids":["diy_comfort","cx7_eiaage"],"reason":"Independent reports document shallow-pad discomfort and an aged sample's cushion deterioration. Neither establishes a current-generation failure rate or a revision-specific manufacturer defect.","status":"partial"},"lifecycle_facts":{"claim_ids":["cx7_spares","cx7_eiaage"],"reason":"Read Sony's historical service manual and an actual repaired-sample review. Current regional parts stock, warranty and support-end date are not verified; parts provider snapshot was robots-denied.","status":"partial"}},"discrepancies":[{"claim_ids":["diy_comfort","cx7_sonarcomfort"],"evidence_locator_ids":["loc_diy","cx7_sonar"],"item_id":"cx7_comfort_discrepancy","resolution":"Fit is individual and exact sample revisions are unspecified; preserve both observations and recommend a personal trial.","scope":{"country":{"state":"unknown"},"firmware":{"state":"not_applicable"},"hardware_revision":{"state":"unknown"},"os":{"state":"not_applicable"},"variant":{"state":"known","values":["MDR-7506"]}},"sides":[{"claim_ids":["diy_comfort"],"explanation":"DIY-Audio-Heaven reports discomfort from shallow foam."},{"claim_ids":["cx7_sonarcomfort"],"explanation":"Most Sonarworks testers found long sessions comfortable, while some reported pressure points."}],"status":"unresolved","title":"Comfort observations differ","topic_id":"comfort_usability"}],"events":[],"evidence_edges":[{"claim_id":"diy_comfort","evidence_locator_id":"loc_diy","relation":"supports"},{"claim_id":"cx7_studio","evidence_locator_id":"loc_sony","relation":"supports"},{"claim_id":"cx7_ohms","evidence_locator_id":"cx7_manual","relation":"supports"},{"claim_id":"cx7_dc","evidence_locator_id":"loc_diy","relation":"supports"},{"claim_id":"cx7_sonarcomfort","evidence_locator_id":"cx7_sonar","relation":"supports"},{"claim_id":"cx7_eiaage","evidence_locator_id":"cx7_eia","relation":"supports"},{"claim_id":"cx7_spares","evidence_locator_id":"cx7_manual","relation":"supports"},{"claim_id":"cx7_cable","evidence_locator_id":"loc_sony","relation":"supports"},{"claim_id":"cx7_nominal_testfrequency","evidence_locator_id":"cx7_manual","relation":"supports"},{"claim_id":"sony_driver_v7","evidence_locator_id":"loc_sony","relation":"supports"}],"evidence_locators":[{"evidence_locator_id":"loc_rt","locator":"Review heading","locator_type":"section","source_revision_id":"source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2"},{"evidence_locator_id":"loc_sony","locator":"Product heading","locator_type":"section","source_revision_id":"source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2"},{"evidence_locator_id":"loc_diy","locator":"Sony MDR-7506: comfort and specifications","locator_type":"section","source_revision_id":"source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951"},{"evidence_locator_id":"cx7_sonar","locator":"Comfort; Build quality","locator_type":"heading","source_revision_id":"source_snapshot_7578626d51ae20e9a5ea6d651171429ef8c06842d8a44276fdd96d1eeba15e42"},{"evidence_locator_id":"cx7_eia","locator":"Paragraph beginning When Landon and I took a closer look","locator_type":"paragraph","source_revision_id":"source_snapshot_15a5fea696ac03c8c50d1364c0dfbdaf3827babaa12add73ce5426e448685e5a"},{"evidence_locator_id":"cx7_manual","locator":"SPECIFICATIONS; EXPLODED VIEWS","locator_type":"section","source_revision_id":"source_snapshot_b6fe76fd32c68b595a9b0b85cf69f6f21f5d3145532a648ccf1c1ea033c4f163"}],"gaps":[{"gap_id":"gap_1","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"build_quality","tried_urls":[]},{"gap_id":"gap_2","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"limitations","tried_urls":[]},{"gap_id":"gap_3","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"frequency_response","tried_urls":[]},{"gap_id":"gap_4","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"distortion","tried_urls":[]},{"gap_id":"gap_6","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"isolation_and_leakage","tried_urls":[]},{"gap_id":"gap_8","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3"],"topic_id":"battery_life","tried_urls":[]},{"gap_id":"gap_9","predicate":null,"reason":"not_found","searched_source_revision_ids":["source_snapshot_b6fe76fd32c68b595a9b0b85cf69f6f21f5d3145532a648ccf1c1ea033c4f163","source_snapshot_15a5fea696ac03c8c50d1364c0dfbdaf3827babaa12add73ce5426e448685e5a"],"topic_id":"repairability","tried_urls":["https://sonypro.encompass.com/model/SONMDR7506","https://www.bhphotovideo.com/lit_files/1327891.pdf","https://ifixit-guide-pdfs.s3.amazonaws.com/pdf/ifixit/guide_154979_en.pdf","https://www.delight.rent/upload/iblock/9cb/Naushniki-Sony-MDR_7506.pdf"]}],"known_issues":[],"lifecycle_facts":[{"announced_until":null,"claim_ids":["cx7_spares"],"description":"Sony's 2002 manual lists an ear-pad assembly. Current regional availability and part compatibility remain unverified.","evidence_locator_ids":["cx7_manual"],"item_id":"cx7_parts_lifecycle","kind":"spares","scope":{"country":{"state":"known","values":["US","AEP"]},"firmware":{"state":"not_applicable"},"hardware_revision":{"state":"unknown"},"os":{"state":"not_applicable"},"variant":{"state":"known","values":["MDR-7506"]}},"title":"Historical ear-pad service documentation","topic_id":"repairability"}],"sources":[{"access":"open","canonical_url":"https://www.rtings.com/headphones/reviews/sony/mdr-7506","document_type":"html","fetch_mode":"direct","language":"en","observed_at":"2026-09-27T18:20:00Z","publisher":"RTINGS","retrieved_at":"2026-09-27T18:20:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_688e955b7585322b4268e0af3d8c772921805c89dfb8755e36a13e5a1dcfb4d2","source_role":"lab_review","title":"Sony MDR-7506 Review"},{"access":"open","canonical_url":"https://www.markertek.com/Attachments/Specifications/SonyProAudio/MDR7506-Specifications.pdf","document_type":"pdf","fetch_mode":"direct","language":"en","observed_at":"2026-09-27T18:20:00Z","publisher":"Sony Electronics","retrieved_at":"2026-09-27T18:20:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2","source_role":"datasheet","title":"MDR-7506 Studio Headphones"},{"access":"open","canonical_url":"https://diyaudioheaven.wordpress.com/measurements/brands-st-x/mdr-7506/","document_type":"html","fetch_mode":"direct","language":"en","observed_at":"2026-09-27T18:20:00Z","publisher":"DIY-Audio-Heaven","retrieved_at":"2026-09-27T18:20:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_cce0db5daa3a1945c62075849d623991f3770b52b0dd9e17fb07356ff09126e3","source_role":"lab_review","title":"Sony MDR-7506 measurements"},{"access":"open","canonical_url":"https://diyaudioheaven.wordpress.com/measurements/brands-st-x/mdr-7506/","document_type":"html","language":"en","observed_at":"2026-10-07T17:36:00Z","publisher":"DIY-Audio-Heaven","retrieved_at":"2026-10-07T17:36:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951","source_role":"lab_review","title":"Sony MDR-7506 measurements"},{"access":"open","canonical_url":"https://www.sonarworks.com/blog/reviews/sony-mdr-7506-studio-headphone-review","document_type":"html","language":"en","observed_at":"2026-10-07T17:37:00Z","publisher":"Sonarworks","retrieved_at":"2026-10-07T17:37:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_7578626d51ae20e9a5ea6d651171429ef8c06842d8a44276fdd96d1eeba15e42","source_role":"lab_review","title":"Sony MDR-7506 Studio Headphone Review"},{"access":"open","author":"Karsten Hein","canonical_url":"https://eiaudio.de/gear-and-review/headphones/sony-mdr-7506-professional-studio-monitor/","document_type":"html","language":"en","observed_at":"2026-10-07T17:57:00Z","published_at":"2023-01-28","publisher":"Explorations in Audio","retrieved_at":"2026-10-07T17:57:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_15a5fea696ac03c8c50d1364c0dfbdaf3827babaa12add73ce5426e448685e5a","source_role":"editorial_review","title":"Sony MDR-7506 Professional"},{"access":"open","canonical_url":"https://www.delight.rent/upload/iblock/9cb/Naushniki-Sony-MDR_7506.pdf","document_type":"pdf","language":"en","observed_at":"2026-10-07T17:58:00Z","publisher":"Sony Engineering Corporation","retrieved_at":"2026-10-07T17:58:00Z","rights_context":"editorial_reference","source_revision_id":"source_snapshot_b6fe76fd32c68b595a9b0b85cf69f6f21f5d3145532a648ccf1c1ea033c4f163","source_role":"manual","title":"MDR-7506 Service Manual Ver 1.1 2002.07"}]},"fact_registry_version":"fact-registry-v2","product_id":"productv3_a473b5f0f12d43d79e33f6db57df2e3f","protected_identity":{"externalIdentityKind":"asin","marketplaceId":"amazon_us","normalizedExternalProductId":"B000AJIF4E"},"schema_version":"product-research-package-v7","writing":{"analyses":[{"analysis_id":"analysis_fit","analysis_type":"buyer_fit","claim_ids":["cx7_studio","diy_comfort","cx7_sonarcomfort","cx7_eiaage"],"confidence":0.85,"method":"Synthesis of re-read Sony documentation and scoped independent reviews.","summary":"Sony documents studio and broadcast use. Independent comfort observations differ, so evaluate fit on the actual unit and do not generalize an aged sample with replaced cushions to new stock.","title":"A conditional studio fit"}],"article":{"sections":[{"heading":"Who it is for","paragraphs":[{"claim_ids":["cx7_studio","sony_driver_v7","diy_comfort","cx7_sonarcomfort"],"kind":"factual","paragraph_id":"overview_p1","text":"Sony describes the MDR-7506 as a headphone for broadcast and studio environments, and its datasheet specifies a 40 mm PET diaphragm. Those statements establish its intended role and driver construction; they do not prove that it will suit every engineer or listener. The most useful buying question is whether its physical fit works for your actual session. DIY-Audio-Heaven reports discomfort from shallow padding, while most Sonarworks testers found it comfortable for long sessions. These are different experiences, rather than a universal comfort score. Treat this as a conditional studio choice: try the headphone with the glasses, working posture and session length you normally use. Pay attention to pressure and ear contact instead of relying on the professional label. A short demonstration may miss the very fit limitation that matters during a longer edit. The evidence supports considering the MDR-7506 for its documented purpose, but it leaves personal comfort to an individual trial."}],"section_id":"overview","section_type":"overview"},{"heading":"What the verified specification says","paragraphs":[{"claim_ids":["sony_driver_v7","cx7_ohms","cx7_dc","cx7_nominal_testfrequency"],"kind":"factual","paragraph_id":"driver_p1","text":"The 40 mm driver specification describes a physical component, not a measured judgement about sound accuracy. Likewise, Sony's historical US/AEP service manual lists nominal impedance as 63 ohms at 1 kHz, while DIY-Audio-Heaven reports measured DC resistance of 71 ohms. These values describe different electrical quantities and test conditions. They should remain separate in a comparison instead of being presented as competing answers to one specification. The measured DC value is recorded here as a review measurement, with the reviewer as its source; it is not substituted into Sony's nominal impedance field. For a buyer, the practical consequence is to compare like with like when reading equipment tables. If a seller lists a different impedance, ask which quantity and frequency it describes before concluding that the headphone is another revision. Neither figure alone establishes the output level of an unspecified phone, interface or amplifier. Confirm the intended source equipment with a real listening trial rather than turning a single electrical number into a compatibility guarantee."}],"section_id":"driver","section_type":"performance"},{"heading":"The main buying caution","paragraphs":[{"claim_ids":["diy_comfort","cx7_sonarcomfort"],"kind":"factual","paragraph_id":"comfort_p1","text":"DIY-Audio-Heaven's discomfort finding remains a meaningful warning, but Sonarworks' panel experience prevents it from becoming a claim that nobody can wear the MDR-7506 comfortably. Most of that panel found long sessions comfortable, while some testers reported pressure points. The evidence therefore supports uncertainty about your fit rather than a categorical promise. During a trial, use the headphone as you would at work, not merely while standing at a counter. Notice whether your ears meet the inside of the cups and whether any pressure grows with time. If you have access to more than one sample, inspect the condition of the cushions before attributing a difference solely to your head shape. A buying decision can reasonably turn on comfort even when the intended professional use matches your needs. The useful conclusion is conditional: its studio role is documented, but a fit that causes discomfort is a reason to choose another headphone or investigate a suitable replacement cushion."}],"section_id":"comfort","section_type":"build_and_comfort"},{"heading":"A hands-on review can concern a different physical sample","paragraphs":[{"claim_ids":["cx7_eiaage"],"kind":"factual","paragraph_id":"cx7_reviewscope_p1","text":"Explorations in Audio provides a useful English hands-on account, but its sample was aged and its deteriorating original cushions were replaced. That condition is central to interpreting the review. A listening impression from that headphone is evidence about the unit the reviewer actually used; it cannot establish identical comfort or sound from a newly purchased unit with untouched stock pads. The review remains valuable because it describes real handling rather than repeating a catalogue, yet the sample history should travel with any conclusion drawn from it. When comparing reviews, look for pad condition, repairs and the equipment used, and be cautious if those details are absent. For a used purchase, inspect the cushions directly and ask what has been changed. A replaced component does not automatically make the sample better or worse; it changes what the evidence can represent. This research does not infer a manufacturing revision or a current country of manufacture from that older unit, nor does it turn its long survival into a guaranteed service life for another pair."}],"section_id":"cx7_reviewscope","section_type":"limitations"},{"heading":"Repair documentation is not a current parts guarantee","paragraphs":[{"claim_ids":["cx7_spares","cx7_eiaage"],"kind":"factual","paragraph_id":"cx7_ownership_p1","text":"Sony's 2002 service manual lists an ear-pad assembly in its mechanical parts inventory. Together with the repaired sample described by Explorations in Audio, that supports a limited conclusion: cushion replacement is part of the documented ownership story. It does not prove that a particular spare is available today in your country, or that every historical part number remains the correct choice for a current unit. Before ordering a replacement, confirm model fit, part identity and the seller's return terms. If serviceability is an important reason for buying, check a local repair route while the purchase is still optional. The research does not supply a current parts price, a repair estimate, a warranty duration or a lifetime cost total. A historical service document is useful for understanding construction, but it cannot settle those present-day questions. Plan for uncertainty in local supply and distinguish an owner replacing cushions from more involved repair work whose procedures and required skills have not been established here."}],"section_id":"cx7_ownership","section_type":"maintenance"},{"heading":"Check the cable, condition and fit before committing","paragraphs":[{"claim_ids":["cx7_cable","cx7_studio","cx7_ohms","cx7_dc","diy_comfort","cx7_sonarcomfort","cx7_spares","cx7_eiaage"],"kind":"factual","paragraph_id":"cx7_verdict_p1","text":"Sony's datasheet lists a 3 m coiled cord for the MDR-7506. Consider how that documented cable arrangement fits the distance between your seat and the audio equipment, and try routing it in your own workspace if possible. A listed length is not a promise that every desk arrangement will be convenient. The buying verdict remains conditional: the documented studio and broadcast purpose makes the model relevant, but the comfort disagreement and the history of replaced cushions make a personal fit check especially useful. Keep nominal impedance and measured DC resistance separate when assessing equipment descriptions. Check the actual condition of a used pair, and confirm replacement compatibility rather than assuming a historical part listing guarantees supply. The evidence reviewed here does not identify an exact hardware revision for every independent sample, establish a current regional warranty, or provide a verified lifecycle support deadline. Those gaps remain visible. Buy only after the documented role and the practical trial align with your needs; a professional-use label alone cannot answer those ownership questions."}],"section_id":"cx7_verdict","section_type":"verdict"}],"title":"Sony MDR-7506: studio focus with a fit caveat"},"buyer_decisions":[{"check_before_buying":["Try it during a realistic session.","Inspect cushion condition on a used unit.","Consider the documented 3 m coiled cable."],"claim_ids":["cx7_studio","diy_comfort","cx7_sonarcomfort","cx7_cable","cx7_eiaage"],"constraints":["Comfort must be checked on the actual unit."],"evidence_locator_ids":["loc_sony","loc_diy","cx7_sonar","cx7_eia"],"item_id":"cx7_decision","needs":["Documented broadcast or studio use."],"price_context_ids":[],"reason":"The intended role is documented; fit and unit condition determine the practical choice.","rival_revisions":[],"scope":{"country":{"state":"unknown"},"firmware":{"state":"not_applicable"},"hardware_revision":{"state":"unknown"},"os":{"state":"not_applicable"},"variant":{"state":"known","values":["MDR-7506"]}},"title":"Choose only after a realistic fit trial","topic_id":"buyer_fit","tradeoffs":["Test-panel comfort is favorable for many listeners, but another independent reviewer reports shallow-pad discomfort."],"verdict":"conditional"}],"coverage":{"buyer_decisions":{"claim_ids":["cx7_studio","diy_comfort","cx7_sonarcomfort","cx7_cable","cx7_eiaage"],"reason":"Decision covers documented role, real comfort disagreement, cushion condition and cable arrangement. Exact regional warranty and current hardware revision remain unknown.","status":"partial"},"ownership_costs":{"claim_ids":["cx7_spares","cx7_eiaage"],"reason":"Researched cushion condition and historical replacement documentation. No prices submitted; no verified current repair cost or total ownership calculation is claimed.","status":"partial"}},"evidence_revision_id":"research_evidence_revision_dd63760a97444504a7bf3039dc52c24b","faq":[{"answer":"Sony describes broadcast and studio environments. That intended role does not guarantee personal comfort or suitability for every task.","claim_ids":["cx7_studio"],"faq_id":"faq_for_whom","intent":"pre_purchase","question":"What use does Sony document for the MDR-7506?","source_ids":["source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2"]},{"answer":"Sony's datasheet specifies a 40 mm PET driver.","claim_ids":["sony_driver_v7"],"faq_id":"faq_driver","intent":"pre_purchase","question":"What driver size does it use?","source_ids":["source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2"]},{"answer":"The reviews disagree. DIY-Audio-Heaven reports discomfort from shallow foam, while most Sonarworks testers found long sessions comfortable and some reported pressure points. Try it yourself.","claim_ids":["diy_comfort","cx7_sonarcomfort"],"faq_id":"faq_comfort","intent":"limitation","question":"Is it comfortable for long sessions?","source_ids":["source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951","source_snapshot_7578626d51ae20e9a5ea6d651171429ef8c06842d8a44276fdd96d1eeba15e42"]},{"answer":"Try the fit during a realistic session, inspect cushion condition on a used pair, and consider the documented 3 m coiled cable in your workspace. Confirm local replacement compatibility separately.","claim_ids":["diy_comfort","cx7_sonarcomfort","cx7_eiaage","cx7_cable","cx7_spares"],"faq_id":"faq_decide","intent":"pre_purchase","question":"What should I check before buying?","source_ids":["source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951","source_snapshot_a6c659870529f8650773d6837c3f30f2e22112ba9a377a0beae88e0c9ccfe2b2"]},{"answer":"Sony's historical service manual specifies nominal impedance of 63 ohms at 1 kHz. DIY-Audio-Heaven reports measured DC resistance of 71 ohms. They describe different quantities and should not replace one another.","claim_ids":["cx7_ohms","cx7_dc","cx7_nominal_testfrequency"],"faq_id":"cx7_faq_impedance","intent":"compatibility","question":"Why do sources show 63 ohms and 71 ohms?","source_ids":["source_snapshot_b6fe76fd32c68b595a9b0b85cf69f6f21f5d3145532a648ccf1c1ea033c4f163","source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951"]}],"measurements":[{"claim_id":"cx7_dc","conditions":{"method":"Reviewer-reported DC resistance measurement","notes":"DIY-Audio-Heaven reports measured DC resistance, not nominal impedance at 1 kHz. Sample count and hardware revision are unspecified."},"lab":"DIY-Audio-Heaven","measurement_id":"cx7_measure_dc","metric":"dc_resistance","source_id":"source_snapshot_13526b952c3ae4fa694ccad2776aae6c84ec3091c318502d6c265b867d95d951","unit":"ohm","value":71}],"ownership_costs":[],"price_contexts":[],"usage_scenarios":[{"assessment":"conditional","claim_ids":["cx7_studio","diy_comfort","cx7_sonarcomfort"],"gap_reason":null,"limitations":["Comfort differs among reviewers and needs a personal trial."],"scenario_id":"scenario_studio","situation":"A buyer considering the documented studio headphone for a realistic seated working session.","title":"Studio and broadcast use"}]}},"source_schema_version":"product-research-package-v7","sources":[{"number":1,"publisher":"DIY-Audio-Heaven","title":"Sony MDR-7506 measurements","url":"https://diyaudioheaven.wordpress.com/measurements/brands-st-x/mdr-7506/"},{"number":2,"publisher":"Explorations in Audio","title":"Sony MDR-7506 Professional","url":"https://eiaudio.de/gear-and-review/headphones/sony-mdr-7506-professional-studio-monitor/"},{"number":3,"publisher":"DIY-Audio-Heaven","title":"Sony MDR-7506 measurements","url":"https://diyaudioheaven.wordpress.com/measurements/brands-st-x/mdr-7506/"},{"number":4,"publisher":"Sony Electronics","title":"MDR-7506 Studio Headphones","url":"https://www.markertek.com/Attachments/Specifications/SonyProAudio/MDR7506-Specifications.pdf"},{"number":5,"publisher":"Sonarworks","title":"Sony MDR-7506 Studio Headphone Review","url":"https://www.sonarworks.com/blog/reviews/sony-mdr-7506-studio-headphone-review"},{"number":6,"publisher":"RTINGS","title":"Sony MDR-7506 Review","url":"https://www.rtings.com/headphones/reviews/sony/mdr-7506"},{"number":7,"publisher":"Sony Engineering Corporation","title":"MDR-7506 Service Manual Ver 1.1 2002.07","url":"https://www.delight.rent/upload/iblock/9cb/Naushniki-Sony-MDR_7506.pdf"}]}