{"appears_in":[{"position":8,"ranking_slug":"best-soundbars-home-theater-2026","ranking_title":"2026 年回音壁怎么选：先看真环绕、eARC 与游戏直通，8 款从卧室到客厅影院横向对比","score":8.1,"url":"https://buyranker.com/ranking/best-soundbars-home-theater-2026"}],"brand":"Polk Audio","buy_url":null,"canonical_url":"https://buyranker.com/product/polk-signa-s4","category":{"name":"回音壁","slug":"soundbar"},"cons":["没有 Wi-Fi 或自动校准","无 HDMI 输入","没有实体后环绕"],"description":"以较低总价提供实体中心、上射与低音炮，功能简单但不依赖 App。","id":"fe5054216e41824bd6592a98f6c91d90","image_url":null,"name":"Polk Signa S4","official_url":"https://www.polkaudio.com/en-us/product/sound-bars/signa-s4/300443.html","price":{"currency":"USD","max":449,"min":359},"pros":["低音炮随附","实体中心和上射单元","连接简单且价格较低"],"release_year":2021,"slug":"polk-signa-s4","specs":{"HDMI":"eARC","尺寸":"1046 × 60 × 95mm","低音炮":"5.9 英寸无线","上射单元":"2 个","其他输入":"光纤 / 3.5mm / Bluetooth","标称声道":"3.1.2"},"summary":"3.1.2、无线低音炮、eARC 和 VoiceAdjust 的高性价比 Atmos 套装。"}