iFi Pro iESL
The Pro series iESL is an unsurpassed energizer for electrostatic headphones (and transformer-coupled stage for flagship dynamic headphones too).
The Pro iESL driven by either the iFi Pro iCAN or a powerful amplifier takes electrostatic headphones to an unprecedented level of performance.
Its defining characteristic is a transparency and an ultra-wide dynamic range that is totally natural. The Pro iESL works with Stax, Sennheiser Orpheus and many more.
Classic & Cutting Edge Technology
The Pro iESL’s two key elements combine the very best in classical approaches with the latest in cutting-edge technology AND superb component quality to deliver the ‘perfectly matched’ headphone experience.
• Atypical Pinstripe Permalloy Core transformer
• Bias voltage generator
• Capacitive Battery Power Supply
Outstanding Component Quality
• One-off, hand-wound, Pinstripe Permalloy Core Transformer
• Wima Capacitors
• Vishay MELF resistors
• Gold-plated silver and sealed-silver alloy contact relays
Maximum Output voltage: 640V RMS (16Ω/20V in)
Frequency Response: Input Voltage (Pro iESL): Input Voltage (iPower):
320V RMS (64Ω/20V in) 5Hz – 50kHz (-3dB)
5V – 9V/1A max
AC 85 – 265V, 50/60Hz
Power Consumption: Dimensions:
213(l) x 206(w) x 63.3(h) mm 2.5kg (5.5lbs) The retail price of the Pro iESL is US$1,399 (ex-tax) or €1,575/£1,395 (incl VAT).
iFi Audio website