{"title":"Open-Back","description":"\u003c!-- HiFiLoop | Open-Back Headphones Collection Description | v2 (Condensed to 6 Accordions, Hardcore Archive \/ Lab Style) --\u003e\u003c!-- HELP ME FIND GEAR = 帮我找设备 \/ 代客寻货 --\u003e\u003c!-- MAKE AN OFFER = 立即出价 \/ 私聊议价 --\u003e\n\u003cdiv class=\"hfl-collection hfl-headphones hfl-open-back\"\u003e\n\u003cp class=\"hfl-lede\"\u003e\u003cstrong\u003eThe HiFiLoop Open-Back Archive\u003c\/strong\u003e is a reference-first index of audiophile \u003cstrong\u003eopen-back\u003c\/strong\u003e over-ear headphones—\u003cstrong\u003eused\u003c\/strong\u003e, \u003cstrong\u003eopen-box\u003c\/strong\u003e, and occasional rare inventory—published with unit-specific notes on \u003cstrong\u003etransients\u003c\/strong\u003e, \u003cstrong\u003eheadstage \u0026amp; layering\u003c\/strong\u003e, pad geometry variables, and \u003cstrong\u003erevision \/ connector\u003c\/strong\u003e details \u003cem\u003ewhen identifiable\u003c\/em\u003e.\u003c\/p\u003e\n\u003cp class=\"hfl-ctas\"\u003eIf a page shows \u003cstrong\u003eSold Out\u003c\/strong\u003e, use \u003ca href=\"#\" class=\"hfl-cta-link\" data-hfl-chat=\"find_gear\" title=\"Request sourcing by specific revision\/serial range (when identifiable), connector\/termination, pad version, tonal target, and system synergy\"\u003e\u003cstrong\u003eHELP ME FIND GEAR\u003c\/strong\u003e\u003c\/a\u003e. For active listings, use \u003ca href=\"#\" class=\"hfl-cta-link\" data-hfl-chat=\"make_offer\" title=\"Request a private offer on an active listing\"\u003e\u003cstrong\u003eMAKE AN OFFER\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv aria-hidden=\"true\" class=\"hfl-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2 class=\"hfl-h2\"\u003eBrowse by Acoustic Design\u003c\/h2\u003e\n\u003cul class=\"hfl-list\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/open-back\" title=\"Open-Back Headphones Collection\"\u003e\u003cstrong\u003eOpen-Back Headphones\u003c\/strong\u003e\u003c\/a\u003e \u003cspan class=\"hfl-muted\"\u003e— vented architecture for cleaner decay, air, and spatial cues; designed for quiet-room listening where stage geometry matters.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/closed-back\" title=\"Closed-Back Headphones Collection\"\u003e\u003cstrong\u003eClosed-Back Headphones\u003c\/strong\u003e\u003c\/a\u003e \u003cspan class=\"hfl-muted\"\u003e— higher acoustic impedance and isolation; seal and pad geometry become part of the tuning (and the bass foundation).\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/over-ear\" title=\"Over-Ear Headphones Collection\"\u003e\u003cstrong\u003eOver-Ear Headphones\u003c\/strong\u003e\u003c\/a\u003e \u003cspan class=\"hfl-muted\"\u003e— the full-size platform (open + closed). Comfort, clamp, and pad geometry influence perceived balance and staging.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv aria-hidden=\"true\" class=\"hfl-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c!-- Accordion (Condensed Set: 6) --\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003eAcoustic Architecture \u0026amp; Transients (Attack \/ Decay Discipline)\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003eOpen-backs reduce cup pressurization and internal reflections, which can sharpen perceived \u003cstrong\u003eattack\u003c\/strong\u003e, clean up \u003cstrong\u003edecay\u003c\/strong\u003e, and preserve low-level \u003cstrong\u003emicro-dynamics\u003c\/strong\u003e. The result is often a more “unforced” presentation—especially in complex mixes where transient separation is the whole game.\u003c\/p\u003e\n\u003cp class=\"hfl-muted\"\u003eDriver type is not destiny. Baffle geometry, damping choices, pad geometry, and amplifier control routinely override the label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003eHeadstage, Layering \u0026amp; Center-Lock (Imaging, Defined)\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003eFor serious open-back buyers, the question isn’t “wide or not”—it’s \u003cstrong\u003eheadstage scale\u003c\/strong\u003e, \u003cstrong\u003elayering\u003c\/strong\u003e, and how reliably a headphone maintains \u003cstrong\u003ecenter-lock\u003c\/strong\u003e across recordings. Driver angle, pad thickness, and positioning shift depth cues and treble localization.\u003c\/p\u003e\n\u003cp class=\"hfl-muted\"\u003eIf you’re sensitive to treble glare, recessed vocals, or mid-bass bloom, tell us upfront—those constraints map directly to safer picks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003ePad Geometry \u0026amp; Positioning Variables (The Hidden Tuning Knobs)\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003ePads are acoustic components. Thickness, compression, and material alter \u003cstrong\u003edriver-to-ear distance\u003c\/strong\u003e and perceived stage focus. Small positioning changes can shift tonal center and image lock—especially on angled-driver designs.\u003c\/p\u003e\n\u003cp class=\"hfl-muted\"\u003eWe disclose pad\/fit-impact condition when it can materially change the expected signature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003eRevision History \u0026amp; Unit-Specific Variants\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003eMany flagship open-backs have meaningful revision eras—pad updates, driver batches, damping tweaks, and connector\/termination variants that subtly shift voicing. When identifiable, we catalog revision cues (serial ranges, markings, included accessories, connector type) so you can target the right unit—not just the model name.\u003c\/p\u003e\n\u003cp class=\"hfl-muted\"\u003eLooking for a known “sweet spot” era? Use \u003cstrong\u003eHELP ME FIND GEAR\u003c\/strong\u003e and specify your target revision\/era and budget ceiling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003eHiFiLoop Verification + Condition Grades (What We Disclose)\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003e\u003cstrong\u003eThe HiFiLoop Bench-Test Protocol\u003c\/strong\u003e indicates the unit was reviewed against a failure-focused checklist before publishing:\u003c\/p\u003e\n\u003cul class=\"hfl-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Balance \u0026amp; Phase Integrity:\u003c\/strong\u003e obvious imbalance\/polarity anomalies screened where detectable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection integrity:\u003c\/strong\u003e connector stability and termination condition noted when applicable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear-impact review:\u003c\/strong\u003e pads\/headband\/clamp indicators noted because they affect comfort and perceived balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessories \u0026amp; configuration:\u003c\/strong\u003e included items confirmed against the listing (cables, adapters, case\/box where applicable).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"hfl-muted\"\u003e\u003cstrong\u003eCosmetic grades\u003c\/strong\u003e (Mint \/ Excellent \/ Good \/ Fair) describe appearance—not “sound quality.” Wear-items are disclosed when they materially impact fit or expected tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails data-hfl-acc=\"\" class=\"hfl-acc\"\u003e\n\u003csummary class=\"hfl-acc__summary\"\u003eConcierge Sourcing, Shipping \u0026amp; Protection (Synergy, Not Just a Model Name)\u003c\/summary\u003e\n\u003cdiv class=\"hfl-acc__panel\"\u003e\n\u003cp\u003e“Sourcing” here means targeting the right \u003cstrong\u003erevision\/era\u003c\/strong\u003e and the right \u003cstrong\u003esystem synergy\u003c\/strong\u003e—source, amp control, preferred gain structure, and your tolerance for treble energy and bass density.\u003c\/p\u003e\n\u003cp\u003eOrders are inspected before dispatch. Typical processing is \u003cstrong\u003e3–5 business days\u003c\/strong\u003e, and international delivery commonly ranges \u003cstrong\u003e7–15 days\u003c\/strong\u003e depending on destination. Free shipping over \u003cstrong\u003e$199\u003c\/strong\u003e; otherwise \u003cstrong\u003e$9.99\u003c\/strong\u003e. Backed by HiFiLoop Protection (14-Day DOA + eligible service coverage, item-dependent).\u003c\/p\u003e\n\u003cp class=\"hfl-muted\"\u003eSend: budget range, source\/DAC\/amp, typical listening volume, and what you want to avoid (treble glare, mid-bass bloom, recessed vocals). We’ll respond with a short technical shortlist.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdiv aria-hidden=\"true\" class=\"hfl-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp class=\"hfl-cta-bottom\"\u003e\u003cstrong\u003eChasing a specific open-back revision—or building for synergy?\u003c\/strong\u003e Use \u003ca href=\"#\" class=\"hfl-cta-link\" data-hfl-chat=\"find_gear\" title=\"Request sourcing via concierge\"\u003e\u003cstrong\u003eHELP ME FIND GEAR\u003c\/strong\u003e\u003c\/a\u003e and include your budget, current chain, typical listening volume, and what you want to avoid (e.g., treble glare, mid-bass bloom, recessed vocals).\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"hifiman-he1000se-headphones-used","title":"HIFIMAN HE1000se Headphones (Black Cable Set) - Good - Verified by HiFiLoop","description":"\u003cdiv\u003e\n\u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n\u003cp\u003eHE1000se is a reference-class open-back planar: fast transients, huge air, and razor-clean separation that scales dramatically with a great chain. This is a high-value “daily driver” listing—authentic flagship performance at used-market pricing, verified by HiFiLoop.\u003c\/p\u003e\n\u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGood \/ Workhorse Condition:\u003c\/strong\u003e Visible wear in specific areas, but built for real listening—strong value for a flagship-class headphone.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeadband fabric has partial delamination (adhesive separation).\u003c\/li\u003e\n\u003cli\u003eEarpads show light compression marks \/ minor indentations.\u003c\/li\u003e\n\u003cli\u003eBlack cable set included: 4-pin XLR + 6.35mm.\u003c\/li\u003e\n\u003cli\u003e3.5mm cable is NOT included.\u003c\/li\u003e\n\u003cli\u003eBox, papers, and accessories are included as shown in the listing photos.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMandatory:\u003c\/strong\u003e The device has passed all functional tests.\u003c\/p\u003e\n\u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n\u003cp\u003eHE1000se is known for its speed and clarity—an expansive stage, high resolution, and effortless layering that rewards good amplification. If you want a flagship planar that stays articulate at both low and moderate volumes, this is a serious endgame contender.\u003c\/p\u003e\n\u003cp\u003eTo unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/amplifiers-dacs\"\u003eAmplifiers \u0026amp; DACs Collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eOpen-back planar magnetic headphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e35Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e96 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e8Hz – 65kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e440g (15.5 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHIFIMAN HE1000se headphones\u003c\/li\u003e\n\u003cli\u003eBox + papers + accessories (as pictured)\u003c\/li\u003e\n\u003cli\u003e2 cables included: 4-pin XLR + 6.35mm\u003c\/li\u003e\n\u003cli\u003eNot included: 3.5mm cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Buy Used from HiFiLoop?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ 14-Day DOA: Full refund\/replace if dead on arrival.\u003c\/li\u003e\n\u003cli\u003e🔧 180-Day Warranty: Free repair service (buyer pays return shipping).\u003c\/li\u003e\n\u003cli\u003e🔬 Lab Tested: I\/O, noise floor, channel balance verified.\u003c\/li\u003e\n\u003cli\u003e📦 Free Shipping: On orders over $199.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSee full Grading Scale in Footer Condition Guide.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCTA:\u003c\/strong\u003e Missed this? Contact “Help Me Find Gear”.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"HiFiLoop","offers":[{"title":"Default Title","offer_id":47614455513302,"sku":null,"price":1149.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/hifiman-he1000se-headphones-feature_2.jpg?v=1765957248"},{"product_id":"audio-technica-ath-ad2000x-headphones-used","title":"Audio-Technica ATH-AD2000X Headphones - Excellent - Verified by HiFiLoop","description":"\u003cdiv\u003e\n  \u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n  \u003cp\u003e\n    The Audio-Technica ATH-AD2000X is a legendary open-back dynamic headphone built for speed, air, and “front-row” immediacy.\n    This unit is Excellent (98% new): reference-tier performance at used-market value, verified by HiFiLoop.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eExcellent \/ Well-Cared For:\u003c\/strong\u003e Very clean overall, lightly used, and handled with care.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eUser manual is NOT included.\u003c\/li\u003e\n    \u003cli\u003eBox and accessories are included as shown in the listing photos.\u003c\/li\u003e\n    \u003cli\u003eNo obvious cosmetic defects observed.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eMandatory:\u003c\/strong\u003e The device has passed all functional tests.\u003c\/p\u003e\n\n  \u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n  \u003cp\u003e\n    ATH-AD2000X is often chosen for its fast transients, open staging, and an engaging midrange that brings vocals and strings forward with clarity.\n    Give it a clean, capable chain and it scales—better control, deeper layering, and a more stable image.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    To unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/amplifiers-dacs\"\u003eAmplifiers \u0026amp; DACs Collection\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eOpen-back dynamic headphone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eDriver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e53mm dynamic driver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e40Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e103 dB\/mW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e5 – 45,000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eCable \/ Plug\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e3.0m cable; 3.5mm plug; detachable 6.3mm adapter (model accessory)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e265 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAudio-Technica ATH-AD2000X headphones\u003c\/li\u003e\n    \u003cli\u003eRetail box + accessories (as shown in photos)\u003c\/li\u003e\n    \u003cli\u003eNot included: user manual\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhy Buy Used from HiFiLoop?\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e✅ 14-Day DOA: Full refund\/replace if dead on arrival.\u003c\/li\u003e\n    \u003cli\u003e🔧 180-Day Warranty: Free repair service (buyer pays return shipping).\u003c\/li\u003e\n    \u003cli\u003e🔬 Lab Tested: I\/O, noise floor, channel balance verified.\u003c\/li\u003e\n    \u003cli\u003e📦 Free Shipping: Orders over $199.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eSee full Grading Scale in Footer Condition Guide.\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eCTA:\u003c\/strong\u003e Missed this? Contact “Help Me Find Gear”.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"HiFiLoop","offers":[{"title":"Default Title","offer_id":47614643044566,"sku":null,"price":379.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/Used_Audio-Technica_ATH-AD2000X_open-back_headphones_in_Excellent_condition_-_product_photo.jpg?v=1765962808"},{"product_id":"moondrop-para2-headphones-used","title":"MOONDROP PARA2 Planar Headphones - Mint - Verified by HiFiLoop","description":"\u003cdiv\u003e\n  \u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n  \u003cp\u003e\n    MOONDROP PARA2 is a modern open-back planar built around a huge 100mm diaphragm with Full Drive Tech (FDT)—fast transients, clean layering, and that “black-background” clarity planar fans chase.\n    This unit is Mint (99% new), includes DLC earpads, and comes as a full set—high performance, high value, verified by HiFiLoop.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eMint \/ Collector Quality:\u003c\/strong\u003e Pristine, like new with minimal handling marks.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eDLC earpads included (see listing photos).\u003c\/li\u003e\n    \u003cli\u003eDec 2025 purchase proof screenshot included.\u003c\/li\u003e\n    \u003cli\u003eFull retail set included (box and accessories as pictured).\u003c\/li\u003e\n    \u003cli\u003eNo obvious cosmetic defects observed.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eMandatory:\u003c\/strong\u003e The device has passed all functional tests.\u003c\/p\u003e\n\n  \u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n  \u003cp\u003e\n    PARA2 is tuned for clarity and control: a fast, well-defined low end, clean mid layering, and extended treble air that helps imaging stay locked-in on complex mixes.\n    It loves a stable, low-noise source—give it a clean amp stage and the stage opens up with tighter separation and more confident dynamics.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    To unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/amplifiers-dacs\"\u003eAmplifiers \u0026amp; DACs Collection\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eDriver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e100mm planar diaphragm with FDT (Full Drive Tech)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e9Ω ± 15% (@1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e106 dB\/Vrms (@1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e≤ 0.03% (@1kHz, 94dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e20Hz–42kHz (Free Field); 20Hz–20kHz effective (-3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eDual 3.5mm headphone jacks; stock cable plug: 4.4mm balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eMOONDROP PARA2 headphones\u003c\/li\u003e\n    \u003cli\u003eEarpads (retail contents)\u003c\/li\u003e\n    \u003cli\u003e4.4mm balanced cable (retail contents)\u003c\/li\u003e\n    \u003cli\u003e4.4mm to 3.5mm adapter cable (retail contents)\u003c\/li\u003e\n    \u003cli\u003eManual, cards, certificates, service card (retail contents)\u003c\/li\u003e\n    \u003cli\u003eDLC earpads (included; see photos)\u003c\/li\u003e\n    \u003cli\u003eDec 2025 purchase proof screenshot\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhy Buy Used from HiFiLoop?\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e✅ 14-Day DOA: Full refund\/replace if dead on arrival.\u003c\/li\u003e\n    \u003cli\u003e🔧 180-Day Warranty: Free repair service (buyer pays return shipping).\u003c\/li\u003e\n    \u003cli\u003e🔬 Lab Tested: I\/O, noise floor, channel balance verified.\u003c\/li\u003e\n    \u003cli\u003e📦 Free Shipping: Orders over $199.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eSee full Grading Scale in Footer Condition Guide.\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eCTA:\u003c\/strong\u003e Missed this? Contact “Help Me Find Gear”.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"HiFiLoop","offers":[{"title":"Default Title","offer_id":47672204427478,"sku":null,"price":359.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/Used_MOONDROP_PARA2_open-back_planar_headphones_in_Mint_condition_-_product_photo.jpg?v=1767016428"},{"product_id":"hifiman-edition-xv-headphones-used","title":"HiFiMAN Edition XV Open-Back Headphones - Mint - Verified by HiFiLoop","description":"\u003cdiv\u003e\n  \u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n  \u003cp\u003e\n    HiFiMAN Edition XV is an open-back planar built for effortless detail and wide, stable imaging—fast transients, clean layering, and a natural, unforced presentation that stays engaging for long sessions.\n    This unit is Mint (99% new) and comes as a full set—serious performance-for-dollar, verified by HiFiLoop.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eMint \/ Collector Quality:\u003c\/strong\u003e Pristine, like new with minimal handling marks.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eNo obvious cosmetic defects observed.\u003c\/li\u003e\n    \u003cli\u003eFull retail set included (box and accessories as shown in listing photos).\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eMandatory:\u003c\/strong\u003e The device has passed all functional tests.\u003c\/p\u003e\n\n  \u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n  \u003cp\u003e\n    Edition XV leans into planar strengths: quick attacks, confident separation, and an open-back stage that keeps instruments well-spaced without sounding thin.\n    Feed it a clean amp and it rewards you with tighter control, stronger dynamics, and a quieter background as volume rises.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    To unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/amplifiers-dacs\"\u003eAmplifiers \u0026amp; DACs Collection\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eOver-ear, open-back\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eDriver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003ePlanar magnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e12Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e92 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e8 Hz – 50 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e452 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eStock Cable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e3 m, 6.3 mm single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eHiFiMAN Edition XV headphones\u003c\/li\u003e\n    \u003cli\u003eFull retail box and accessories (as shown in listing photos)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhy Buy Used from HiFiLoop?\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e✅ 14-Day DOA: Full refund\/replace if dead on arrival.\u003c\/li\u003e\n    \u003cli\u003e🔧 180-Day Warranty: Free repair service (buyer pays return shipping).\u003c\/li\u003e\n    \u003cli\u003e🔬 Lab Tested: I\/O, noise floor, channel balance verified.\u003c\/li\u003e\n    \u003cli\u003e📦 Free Shipping: Orders over $199.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eSee full Grading Scale in Footer Condition Guide.\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eCTA:\u003c\/strong\u003e Missed this? Contact “Help Me Find Gear”.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"HiFiLoop","offers":[{"title":"Default Title","offer_id":47673431883990,"sku":null,"price":319.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/Used_HiFiMAN_Edition_XV_open-back_planar_headphones_in_Mint_condition_-_product_photo.jpg?v=1767020541"},{"product_id":"fiio-ft7-open-back-headphones-used","title":"FiiO FT7 open-back headphones - Excellent - Verified by HiFiLoop","description":"\u003cdiv\u003e\n\u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n\u003cp\u003eThe FiiO FT7 is a flagship open-back planar headphone for listeners who want large-driver scale, fast diaphragm response, and a revealing full-size headphone that benefits from a capable DAC\/AMP chain.\u003c\/p\u003e\n\u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGrade:\u003c\/strong\u003e Excellent -- Very clean, well-cared for, with minor signs of careful use only.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo obvious cosmetic defects observed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersion:\u003c\/strong\u003e FT7\u003c\/li\u003e\n\u003cli\u003eComplete standard accessory set included unless otherwise noted.\u003c\/li\u003e\n\u003cli\u003eExcellent condition is stated in the listing notes; final cosmetic details are confirmed from the actual unit photos before payment.\u003c\/li\u003e\n\u003cli\u003eRepresentative photos shown. Final unit photos and item-specific details are shared during quote confirmation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe device has passed all functional tests.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n\u003cp\u003eThe FT7 is a full-size planar headphone where pad condition, headband condition, cable set, adapter set, and comfort fit are confirmed before payment.\u003c\/p\u003e\n\u003cp\u003eIt is especially suitable for buyers who want an open-back headphone to pair with a capable desktop DAC\/AMP or strong balanced source.\u003c\/p\u003e\n\u003cp\u003eTo unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/dacs-amps\"\u003eDACs \u0026amp; Amps Collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eFiiO FT7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eOpen-back planar magnetic headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eDriver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e106mm planar driver with 1um ultra-thin diaphragm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e5Hz-40kHz stated response\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eAbout 427g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eCable \/ Adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e4.4mm balanced cable with XLR4 and 6.35mm adapters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eIncluded Fit Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eTwo sets of ear pads and headphone storage bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFiiO FT7 open-back headphones\u003c\/li\u003e\n\u003cli\u003eComplete standard accessory set included unless otherwise noted.\u003c\/li\u003e\n\u003cli\u003eFinal included set is confirmed before payment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNext step:\u003c\/strong\u003e Use \u003cstrong\u003eCheck Availability \u0026amp; Quote\u003c\/strong\u003e so HiFiLoop can confirm availability, condition details, included accessories, destination costs, and the final quote before payment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"FiiO","offers":[{"title":"Default Title","offer_id":48315679211734,"sku":null,"price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/img_2_af6735d3-c2d4-4649-836e-6e65040cef2d.jpg?v=1780396655"}],"url":"https:\/\/www.hifiloop.com\/collections\/open-back.oembed","provider":"HiFiLoop","version":"1.0","type":"link"}