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iFi Audio

iFi Audio - Pro iESL


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This product will ship a few weeks after the Lockdown ends.

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7 Days Replacement

Yay! This item is eligible for replacement.

This product is eligible for a replacement if the return request is raised within 7 days of delivery, and ONLY in the unfortunate event that it is found to be defective. This policy is not applicable to customers who are not happy with the product.

Once the manufacturing defect has been confirmed by our inspection team, we will provide a replacement of the originally ordered product. In case of replacements not being available, you can choose another variant, full store credit or a full refund will be provided.

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Your Headphone’s Best Friend

The iFi Audio Pro iESL is engineered to be your electrostatic headset’s best friend. It can drive the headsets of all great electrostatic headphone brands by delivering the needed extra-high-tension voltage needed to energise the electrostatic plates in them. For those who love their dynamic headphones, the amp has something for these too. Enjoy a whole new level of smoothness and airiness with this device.




The Pro iESL uses custom transformers with hand-wound, multi-section windings with both vertical and horizontal sectioning and pinstripe permalloy cores. This offers a wide bandwidth of < 5Hz to > 60kHz (-3dB). You also get clear audio with low distortion. This device also uses the complex, costly and superior Vishay MELF resistors. These give you an optimal power rating and pulse load capability.



Listen All Day (And Beyond)

To keep any electronic noise from bleeding into the headset, the Pro iESL has a Bias Voltage Generator. It charges the device to full before cutting off the power from the mains. Thus, when you listen to your favourite headphone via the Pro iESL, you are listening to it via the battery (and not the mains). The special capacitors from Germany have a 1000volt rating and very high insulation resistance of around 35,000,000 kiloOhm. This reduces the current leakage and in turn, the self-discharge time to 30%. Thus, you get a 100,000 seconds or 27 hours worth of battery power on a single charge.



Maximum Output voltage:
640V RMS (16Ω/20V in)
320V RMS (64Ω/20V in)
Frequency Response:
5Hz – 50kHz (-3dB)
Input Voltage (Pro iESL):
5V – 9V/1A max
Input Voltage (iPower):
AC 85 – 265V, 50/60Hz
Power Consumption:
< 1W
213(l) x 206(w) x 63.3(h) mm
2.5kg (5.5 lbs)


Don’t sweat it, This iFi Audio product is covered by a 1 Year manufacturer's warranty.
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