• Jeff Rowland Model 625 S2 後級擴大機 規格表

625 Series 2 融合了許多與 725 放大器相同的技術特性。與 725 類似，625 S2 訊號電路採用 Rogers 陶瓷電路板層壓材料構建，以實現較低的介電吸收和能量儲存。 725電源供應器中使用的4極濾波電容也已包含在S2中，顯著降低了電源輸出雜訊。 8 歐姆時每聲道的最大輸出功率從 300 瓦增加到 325 瓦。

整個放大器電路採用了基於 LED 的精密電流源，以及 0.1% 薄膜 SMD 電阻器，以實現更穩定的工作點和更低的雜訊。客製化設計的 Lundahl 輸入變壓器具有更高的匝數比，並採用 Cardas 高純度銅線繞製。

輸入電路包括一個額外的線性相位2 極濾波器，可有效衰減來自任何來源的所有帶外訊號，包括DSD 雜訊。糾錯功能整個擴大機周圍整合了電路，總共採用了三種獨立的糾錯技術，用於減少整個音訊頻寬中所有形式的失真。

Model 625 S2 提供了一種感性的、無顆粒感的音樂性，具有無與倫比的透明度和低電平分辨率，從豐富的天鵝絨般的寂靜中綻放出來，並綻放出純粹的聆聽體驗享受。

Features
Machined Aluminum Chassis
Precision-machined chassis with integrated heat-sinks, milled from a solid block of aircraft grade aluminum, provides exceptional thermal heat transfer/dissipation, RFI/EMI shielding, and resonance control.

Composite Circuit Architecture
Unique composite circuit architecture incorporating separate Class AB voltage and current gain blocks with no overall negative feedback, delivers a sensuous grain-free musicality of unparalleled transparency and low level resolution.

Balanced Topology
Inherent cancellation effects of balanced topology implemented throughout all power and input/output circuits ensures greatly reduced distortion and noise under dynamic signal conditions.

High-Current Copper Bus-Bars
High-current, dual polarity, ultra low impedance copper bus-bars distribute both power supply input current and signal output current, virtually eliminating intra-circuit EMI signal contamination, greatly reducing internal wiring, while increasing circuit board rigidity.

High Precision Surface Mount Components
Extensive use of Lead (Pb)-free, low temperature coefficient, active and passive surface-mount components results in significantly smaller loop areas, reduced circuit capacitance and inductance, and introduces less noise than conventional leaded components.

Transformer-Coupling and Isolation
Transformer coupled input circuitry provides universal component compatibility and virtually eliminate ground loop noise and RFI/EMI. Transformer coupling ensures identical amplifier overall gain when using unbalanced input adapters.

Power Factor Correction
Power Factor Correction (PFC) in the power supply reduces AC line harmonic noise pollution and increases AC line power utilization to 99%.

High-Efficiency Switch-Mode Power Supply
Highly efficient, compact, light weight, 1500 watt DC switch-mode power supply provides optimum voltage regulation for all circuits and operating conditions, and allows for quiet operation over a wide range of AC mains power sources.

Dual-Position Speaker Terminals
Dual CE approved speaker output terminals, in both horizontal and vertical orientation, require no tools for secure, low resistance connections, and allow for easy bi-wiring applications.

Flexible 20 Amp AC Power
20 amp AC power inlet accepts a wide variety of after-market high-performance power cables.

Front Panel Standby Button
Illuminated front panel push-button switches the amplifier into standby mode (<1 watt consumption).

Rear Panel Remote Jack
12V 3.5mm jack on rear panel permits amplifier power on/standby switching in remote and home theater applications.

Self-Leveling Supports
Removable 3-point self-leveling Delron chassis supports provide high frequency mechanical noise isolation.

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