에코(EKCO) EV-55ST 진공관 파워앰프 > 전문장터

에코(EKCO) EV-55ST 진공관 파워앰프입니다.

KT88 진공관을 사용 채널당 55와트 출력(트라이오드 모드시 28와트), 옆우드패널의 매끄러운 디자인으로 브리티쉬 제품다운 포인트를 강조한 EKCO의 파워앰프입니다.
현대적이면서도 정연한 음악적 밸런스와 깊고 중후한 음색이 매력적이며, 저능률 스피커도 유유히 드라이브하는 출중한 구동력과 투명한 음장과 왜곡이 없는 순수한 울림에 있어 단순한 진공관 앰프라는 틀을 뛰어넘는 각별한 매력을 느낄수 있는 제품입니다.
입력단은 RCA 2계통, 스피커는 2조(A/B) 지원합니다.

정식수입 220볼트, 신품입니다.
판매가는 송료포함 320만원이고 전시품 1대 280만원에 판매합니다.
다른제품과 절충교환 가능합니다.
광주지역 직거래 가능하고 전국택배 가능합니다.

010-8615-1858
poohlover4364@hanmail.net

EV55ST
Stereo Vacuum Tube Power Amplifier

Engineered to create a level of performance that goes beyond mere technicalities, the EKCO EV55ST Vacuum Tube Power Amplifier offers superbly realistic sound reproduction combined with stunning quality of craftsmanship. While using the most suitable valves, this EV55ST is capable of producing a super sonic performance.

With 'tweakable' valve, negative feedback and speaker settings, the EV55ST is versatile in sound configuration and will drive a wide range of loudspeakers with ease and sonic detail.

Specifications

>90dB Signal/Noise Ratio
560mV RMS Input Sensitivity
Input Impedance 100K Ω
Output Impedance 4 / 8 Ω
230V, ± 5%, 50Hz Power Supply
280W Max. Power Consumption
4 x KT88, 1 x  12AX7, 4 x 12AU7 Valves
236mm x 356mm x 420mm
28kg / 61.73lbs Net Weight
2 x RCA Inputs
4 x Speaker Terminal Outputs
Ground Connection
Speaker A/B Select
Ultralinear / Triode Mode
Adjustable Negative Feedback
18Hz ? 35kHz Frequency Response (±1dB)
2 x 55W Output Power (Ultra-linear Mode)
2 x 28W Output Power (Triode Mode)
<1% at 1kHz Total Harmonic Distortio
Triode or Ultralinear

The EV55ST lets its listener choose between the channels Triode mode (28 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 EV55ST 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 EV55ST as flexible as possible to cater for different speakers, sound sources and tastes.

Retro Charm

The EV55ST'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.