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英国EKCO(埃柯) EV55SE 真空管合并式放大器

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以卓越的制作工艺打造的EKCO EV55SE真空管合并式功率放大器不仅能重播出温暖、醇厚的声音,而且拥有极具质感的复古外形,令人心神荡漾、爱不释手。

 

EV55SE可在两种输出模式下工作。在Class AB Push-Pull Triode(甲乙类三极管推挽)模式下输出功率为每声道28W,在Class AB Push-Pull Ultralinear(甲乙类超线性推挽)模式下输出功率提升至每声道55W

 

EV55SE拥有五路信号输入选择(Disc1, Disc2, Aux, Tape, Tuner)并附带遥控功能。真空管的金属保护罩表面经过耐高温漆处理,为珍贵的真空管筑起一道坚固的保护墙。机身两侧用两块表面经钢琴漆处理的实木镶嵌,为EV55SE增添几分高贵、优雅的艺术气质。

 

 

Integrated Vacuum Tube Amplifier

Engineered to create a level of performance that goes beyond mere technicalities, the EKCO EV55SE Vacuum Tube Integrated Amplifier offers superbly realistic sound reproduction combined with stunning quality of craftsmanship. While using the most suitable valves, this EV55SE is capable of producing a super sonic performance.

 

With 5 RCA inputs combined with 'tweakable' valve, negative feedback and speaker settings, the EV55SE a joy to operate. Using 4 x KT88, 1 x 12AX7 and 4 x  12AU7 valves, users can expect an equally enjoyable sound .

 

 

 

Triode or Ultralinear

The EV55SE lets its listener choose between the channels Triode mode (25 Watts RMS) and Ultra-linear mode (55 Watts RMS). The triode push-pull output stage is the choice for many audiophiles for its detailed and pure sound quality. Triodes are delicate valves which have limited output, so for driving higher powered speakers Ultra Linear mode is ideal. By connecting the screen grid to a special tapping on the output transformer a local feedback loop is incorporated around the output valves, lowering their output impedance, linearising the output and massively reducing distortion. The result is an amplifier with most of the advantages of the triode combined with the efficiency and power of a multi-grid valve.

 

 

 

Overall Negative Feedback (NFB) Switchable

The EV55SE is equipped with an Overall Negative Feedback (NFB) switch. This is a process where a percentage of the output of an amplifier is fed back to the input in reverse (negative) phase. This lowers the output impedance and reduces distortion to improve overall frequency response. 

 

As NFB at high frequencies can cause instability at high frequencies with awkward loudspeakers we recommend with horn loudspeakers that triode operation with low NFB is the way to go, however with conventional, low sensitivity loudspeakers Ultra linear mode with high NFB would be a suitable choice. Either way, we've made the EV55SE as flexible as possible to cater for different speakers, sound sources and tastes.

 

 

 

Retro Charm

The EV55DP's steel chassis is sandwiched inbetween matched, handcrafted solid wood panels (Deep Louro Petro) in piano gloss finish. It's design influenced by Ekco's original bakerlite FM radios with a modern twist to match the most stylish of living rooms.

 

 

 


 

 

 

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技术参数

电子管Valves:

 4 x KT88; 1 x 12AX7; 4 x 12AU7

输出功率Output Power:

超线性 Ultralinear Mode: 55W / 8 ohms    三极管 Triode Mode: 28W / 8 ohms

输入灵敏度Input Sensitivity:

Ultralinear Mode: 300mV RMS for 55W / 8 ohms (Max Fb)
       Triode Mode: 300mV RMS for 28W / 8 ohms (Max Fb)

频率响应Frequency Response:

20Hz to 30kHz ± 1dB

总谐波失真THD:

≤ 1% at 1kHz (Ultralinear Mode / Triode Mode)

讯噪比Hum and Noise:

Ultralinear Mode: >90dB 55W / 8 ohms (Max Fb)
      Triode Mode: >90dB 28W / 8 ohms (Max Fb)

尺寸Dimensions

(D) 441mm x (W) 356mm x (H) 236mm

净重Gross Weight:

28kg

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