intros：{"brand_intro":"拜亚动力（beyerdynamic）成立于1924年德国海尔布隆，是全球历史最悠久的专业音频设备制造商之一。创始人尤根·拜亚（Eugen Beyer）最初致力于研发动圈扬声器，1937年推出了世界上第一款动圈耳机DT 48，奠定了其在声学领域的先驱地位。品牌以\"德国制造\"为品控核心，坚持手工装配与严苛的频响测试，其STELLAR.45驱动单元技术历经三代迭代，在瞬态响应与细节还原上达到行业标杆。拜亚动力在专业录音棚、古典音乐监听领域拥有不可撼动的权威性，被全球顶级音乐制作人视为\"参考级\"工具。","product_intro":"DT 900 Pro X是拜亚动力2022年推出的新一代开放式监听耳机，定位专业音乐制作与高保真鉴赏。核心卖点包括全新STELLAR.45驱动单元，采用三层复合振膜与钕磁铁系统，显著降低总谐波失真（<0.02%），提供极宽的频率响应（5-40,000 Hz）。开放式声学腔体设计带来自然宽阔的声场，适合混音、母带处理及乐器分轨监听。相比竞品森海塞尔HD 600，DT 900 Pro X在低频下潜与瞬态速度上更胜一筹，且可换线设计（mini XLR接口）提升了耐用性。头梁与耳罩采用记忆海绵+天鹅绒材质，长时间佩戴舒适度极高。","key_specs":{"驱动单元":"STELLAR.45动圈单元（45mm钕磁铁）","频率响应":"5 Hz - 40,000 Hz","阻抗":"48 Ω","灵敏度":"100 dB SPL (1 mW)","重量":"345 g（不含线材）","线材接口":"mini XLR（可拆卸，附3.5mm与6.35mm插头）"}}
alt_products：[{"product_name":"拜亚动力 DT 900 Pro X 开放式头戴式监听耳机","brand":"拜亚动力","model":"DT 900 Pro X","price":1899},{"product_name":"AKG K712 Pro 开放式头戴式监听耳机","brand":"AKG","model":"K712 Pro","price":1599}]
kol_quotes：["混音师李金城：DT 900 Pro X的瞬态响应让我能清晰捕捉到每个音符的起落，是混音阶段的'照妖镜'","B站UP主'耳机狗'：开放式声场自然得像在听音箱，但细节比HD 600多出一截"]
scoring_breakdown：[{"source":"word_of_mouth","score":94.1,"weight":0.2,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"综合京东、天猫、小红书及专业音频论坛评价，DT 900 Pro X被用户誉为\"四千元内最均衡的开放式监听耳机\"。优点集中在：解析力惊人，乐器分离度极高，尤其适合古典乐与爵士乐混音；佩戴舒适，连续使用4小时无压迫感；做工扎实，德国制造品质可靠。缺点方面：开放式结构导致漏音明显，不适合嘈杂环境；原装线材偏硬，部分用户建议升级平衡线；高频略有金属感，对齿音敏感者需搭配EQ调整。专业评测机构\"耳机俱乐部\"给出4.8分，称其\"重新定义了中端监听耳机的性价比\"。","source_count":4}},{"source":"objective","score":94,"weight":0.5,"confidence":0.7,"details":{"dimension":"battery","rating_avg":4.7,"review_count":12000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":94,"weight":0.15,"confidence":1,"details":{"rating_avg":4.7,"review_count":12000,"source":"product_reviews_aggregate"}},{"source":"expert","score":80.80000000000001,"weight":0.15,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"matched_count":2,"base_score":82,"weighted_score":80,"sample":["混音师李金城：DT 900 Pro X的瞬态响应让我能清晰捕捉到每个音符的起落，是混音阶段的'照妖镜'","B站UP主'耳机狗'：开放式声场自然得像在听音箱，但细节比HD 600多出一截"]}}]