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Boulder 861 立體聲後級擴大機
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HK$78,000.00 HKD
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Description
Boulder 861 是 800 系列立體聲後級，箱體與 812 DAC 前級同一尺寸：約 305 × 89 × 305 mm。連續 50 W／8 Ω、90 W／4 Ω；峰值 75 W／8 Ω、110 W／4 Ω、200 W／2 Ω。THD 0.01%。頻寬 20 Hz–20 kHz 僅 −0.04 dB，−3 dB 在 0.015 Hz／150 kHz。增益 26 dB。平衡輸入阻抗 100 kΩ。美國 Louisville 廠內銑殼、組板、測試。
輸入只有一組 XLR，沒有 RCA。喇叭端子是 Boulder 6 mm 手擰柱（叉片為主）。直流耦合，帶 DC／短路／過熱保護：偵測到危險會靜音輸出，避免燒喇叭。Ethernet／USB 只做聯動與韌體，不是訊源。與 812 同一網絡時可順序開機。
紙面 50 W 不是小電流機。多管輸出、保護夠快，峰值入 2 Ω 到 200 W。中小型、中等靈敏度喇叭最對口；極低靈敏度落地、大場面仍要聽實際搭配。配 812 是同一套聲音語言；也可接其他平衡前級。
設計重點
- 立體聲後級，與 812 同箱
- 連續 50 W／8 Ω、90 W／4 Ω
- 峰值 200 W／2 Ω
- 一組平衡 XLR
- 6 mm 手擰喇叭柱
- DC 耦合＋保護電路
- 美國原廠製造
聲音性格 中性、不加味精。靜場清楚，中頻結實，低頻收得住。不是膽機暖邊，也不是冷分析。紙面功率不大，控制力比同瓦數機強。難推大落地、極低阻抗長時間滿功仍受連續 50 W 限制；聽音樂峰值足夠。
規格
- 形式：立體聲後級擴大機
- 連續功率：50 W／8 Ω；90 W／4 Ω
- 峰值功率：75 W／8 Ω；110 W／4 Ω；200 W／2 Ω
- THD：0.01%
- 輸入噪聲（EIN, 20 kHz）：2.6 μV
- 輸入阻抗：100 kΩ（平衡）
- 最大增益：26 dB
- 頻率響應：20 Hz–20 kHz，+0.00／−0.04 dB；−3 dB @ 0.015 Hz／150 kHz
- 輸入：XLR × 1 對
- 輸出：6 mm 手擰喇叭柱
- 功耗：最高 550 W
- 尺寸：約 305 × 89 × 305 mm
- 重量：約 10 kg
- 電源：100／120／240 V
- 產地：美國
媒體評價
- 普洛影音網：聽過驅動力最強的 50 W。中性鑑聽；換喇叭風格跟喇叭走，機器自己不加色。
- Future Audiophile：小箱有大廠味道。電流夠、保護夠，不是紙面數字機。
- HiFi Test（812＋861）：透明、流暢、無斷層。兩機同尺寸、同調，一套就完整。
- The Audio Tailor：低阻抗峰值有餘量；保護電路讓它敢輸出電流。
- 選法：中小喇叭、書架、中等靈敏度落地配 861；要 200 W 連續選 866 合併機。
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
Once your order has shipped, you will receive a confirmation email containing a tracking number. You can track the status of your shipment through our website or the logistics company's website.
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!
