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Boulder 812 DAC 前級耳擴｜串流
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Description
Boulder 812 是 800 系列的 DAC／前級／耳擴／串流機。數位濾波與轉換跟 866 同一套架構。模擬全平衡 Class AB。可當固定電平 DAC、可變增益前級、或桌面耳擴。美國 Louisville 廠內銑殼、組板、測試。
模擬：兩組 XLR 入、一組 XLR 前級出。數位：Ethernet、Wi-Fi、USB-B（接電腦）、四個 USB-A Host（接自帶電硬碟）、同軸、兩組 Toslink。Roon Ready，另有 AirPlay。PCM 至 32 bit／384 kHz，DSD 至 DSD128。沒有唱放。音量是光學編碼、100 dB、1 dB 一步。可切 DAC 直出、劇院直通、耳機／喇叭輸出。
前面板四個耳機孔：4-pin XLR、6.3 mm、3.5 mm、4.4 mm Pentaconn，可同時插多副。32 Ω 約 200 mW，600 Ω 約 80 mW。靈敏度分檔。附金屬蓋遮塵。App 調輸入、增益、命名。
機身約 305 × 89 × 305 mm，約 6.4 kg。銀鋁、側板刻線。配 866 合併機或 861 後級是同一語言；單獨推耳機也完整。
設計重點
- DAC＋前級＋耳擴＋串流
- 866 同系 DSP／DAC
- 兩組 XLR 入、一組 XLR 出
- 四種耳機孔，含平衡
- Roon、USB-B、光纖、同軸
- 光學編碼音量，100 dB／1 dB
- 美國原廠製造
聲音性格 不加油、不亮邊。結實、層次清楚，錄音空間還原。耳放跟喇叭出口徑一致，換耳機不會忽然變另一套調音。不是膽機暖味，也不是冷分析。難推平面振膜、低靈敏度大耳機能推；極高阻抗長時間爆音量仍受 80 mW＠600 Ω 限制。
規格
- 形式：DAC／平衡前級／耳擴／串流
- 模擬輸入：XLR × 2
- 前級輸出：XLR × 1
- 數位輸入：Ethernet、Wi-Fi、USB-B、USB-A Host × 4、同軸、Toslink × 2
- 格式：PCM 32／384；DSD128；Roon Ready
- 最大輸入：6.0 Vrms
- 最大輸出：14.0 Vrms
- 最大增益：19.4 dB
- 音量：100 dB，1 dB 步進
- THD+N：0.0017%（2 V／2 kHz）
- 頻率響應：20 Hz–20 kHz，+0.00／−0.03 dB；−3 dB @ 0.02 Hz／250 kHz
- 削波噪比：116 dB
- 輸入阻抗：100 kΩ 平衡
- 輸出阻抗：100 Ω 平衡
- 耳機輸出：4-pin XLR、6.3 mm、3.5 mm、4.4 mm Pentaconn
- 耳放：200 mW／32 Ω；80 mW／600 Ω
- 功耗：最高 50 W
- 尺寸：約 305 × 89 × 305 mm
- 重量：約 6.4 kg
- 產地：美國
媒體評價
- The Absolute Sound：透明、不編輯。結實、能量黏在一起；每張唱片自己的舞台還在。
- Future Audiophile：800 系列做工到位。解析高、低音緊，當系統中樞夠用。
- HiFi Report：耳放明顯出色；耳機聽到的更接近 812 原聲，少了後級與房間染色。
- High Fidelity：乾淨但不亮、飽和夠。檔案播放＋前級＋耳擴一箱完成。
- 什麼值得買／用家：中性透明、好推好配；不是怪物級平面除外，市面大耳機多數推得動。
Shipping Information
Shipping Information
Welcome to our online store! Below are all the details regarding the shipping of Hi-Fi audio equipment and accessories.
Shipping Zones and Fees
- Local Hong Kong: For orders of HK$500 or more, we offer free standard shipping. An additional fee applies to remote areas.
- Outside Hong Kong and Overseas: Shipping fees will be charged at cost and may vary on different dates. The fee will be calculated based on the order date. For orders of HK$10,000 or more, a corresponding shipping discount will be applied. Please contact us for details.
Processing Time
Orders are typically processed and prepared for shipment within 2-3 business days (excluding weekends and public holidays). During peak seasons or promotional periods, processing times may be slightly longer. Once your order has shipped, you will receive a confirmation email with a tracking number.
Shipping Methods
We partner with reliable logistics providers to ensure your audio products are delivered safely and on time. Depending on your location and order size, shipping methods may include:
- Local Hong Kong: SF Express or JD Logistics are used by default. Hong Kong Post service can be requested.
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Outside Hong Kong and Overseas: FEDEX or UPS are used by default, or other courier companies may be used due to shipping cost considerations.
Estimated Delivery Time Delivery times vary depending on the destination:
- Local Hong Kong: Standard shipping usually arrives within 1-3 business days after dispatch.
- Outside Hong Kong and Overseas: Typically 5-12 business days, subject to customs clearance and destination.
Please note that unforeseen circumstances such as weather delays or logistics issues may affect delivery times. We will do our best to provide accurate estimates and keep you informed throughout the process.
Track Your Order
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Shipping Restrictions
Some products may have shipping restrictions due to size, weight, or special materials. Please check the product description or contact our customer service team for shipping eligibility.
Customer Support
If you have any questions regarding shipping, delivery times, or special requests, our customer service team is happy to assist. Please contact us via email at contact@newgenaudio.shop.
Thank you for choosing NewGen Audio as your supplier for hi-fi audio equipment. We look forward to providing you with excellent service!
