• Jeff Rowland Model 725 mono 後級擴大機 規格表

725 是利用高度完整的 625 單體的巨大優勢而開發的。 Model 725 不僅僅是為高功率而打造。利用物理上極其有效的整體配置，我們能夠慷慨地投資於技術和零件，以進一步提高音質。

Features
Use large input transformer
The Model 725 S2 uses a large input transformer made by Lundahl, which is also installed in the Corus. This is achieved through the increased space provided by the one-piece chassis. This improves the low-frequency range below 50Hz, reducing distortion and increasing clarity.

Benefits of transformers
The input transformer used in the input section allows you to maintain the highest compatibility with the preamplifier you combine it with. It also reduces ground noise and EMI/RFI. Even when using an unbalanced input through an adapter, the transformer will produce the same effect in the gain region as a balanced input.

Machined duralumin chassis
A complete monocoque body carved from a block of 6061 duraluminium! The chassis and heat sink are the world's first fully integrated amplifier structure. The unique chassis structure, precision-machined from a single block of aircraft-grade aluminum, greatly aids in heat dissipation, RFI/EMI external noise shielding, and resonance control properties.

Non-NF Circuit
The circuit that serves as the brain of the amplifier employs a new circuit with a unique geometric composite structure consisting of separate AB voltage and current blocks. By suppressing the total amount of negative feedback to zero, the sound particles are finely tuned and the music is reproduced in a way that can be described as emotional. Exceptional clarity and high and low level resolution provide unprecedented musicality and stage presence.

Balanced topology
All input, output and amplifier stage circuits adopt balanced circuit technology, which greatly eliminates distortion and noise and provides excellent dynamic characteristics from strong to soft sounds.

High current busbar
High current, bipolar, ultra-low impedance copper busbars provide both supply current and signal output current. The busbar can significantly reduce EMI signal pollution within the circuit, reduce the amount of internal wiring, and increase the strength of the circuit itself, killing two birds with one stone.

High-precision surface mount technology
Lead (Pb)-free solders are widely used as well as active and passive surface mount components with low temperature variations. Therefore, we are able to minimize the loop area as well as the capacitance and inductance in the circuit. This miniaturization means that noise levels are significantly reduced compared to conventional parts.

Perfluorocarbons
The power factor extractor in the power supply circuit can eliminate the harmonic noise pollution of the AC power supply and increase the utilization rate of the AC power supply to 99%.

Front panel standby
The standby switch on the front panel puts the amplifier into standby mode, consuming less than 1W of power.

High efficiency switching power supply
The high-efficiency, compact and lightweight 1500WDC switching power supply provides the best voltage and power for each circuit, providing an ideal working environment. This power supply ensures quiet operation even over a wide AC power range.

Dual speaker terminals
This terminal is a high-precision one-piece terminal with CE certification and no fastening tools are required. Two units are provided per channel and two-wire connection is also supported.

Strong Earthquake Countermeasures
Fully grounded via 3-point chassis support. The countermeasures against mechanical vibration are also complete. The bracket is removable and the amplifiers can be stacked in two levels using Delrin balls to support dual amplifier drives.

  回上一頁      回主選單