Currently backordered about 3 business days. Order now for immediate shipping once available.
From iFi Imagine the audio equivalent of a Porsche engine of the flagship headphone world and you have thePro iESL.
Electrostatics need high voltages to energize them to make sound. ThePro iESLis one such energizer and delivers the extra-high-tension voltage needed. The capacitor pack has around 35,000,000 kOhm insulation resistance, which means that self-discharge time (to 30%) is around 100,000 seconds or 27 hours.
It is one of the best energizers in the business (even if we do say so ourselves) and is compatible with all the great electrostatic brands – including Orpheusand Koss.
Big sound If you like electrostatics, then you like ‘big’ sound. ThePro iESLwon’t disappoint. Coupled with our more traditional flagship amplifier, thePro iCAN(or any other, but we like ours), thePro iESLlowers distortion, separates vocals, orchestras and instruments. It opens up the bass and leaves you with a wide, structured soundstage.
Dynamic Duo And, we’ve got good news. ThePro iESLcan also be used with your flagship dynamic headphones thanks to a unique transformer-coupled-stage that can take them to the max. Just Go Pro
Enjoy the pure luxurious, pleasure of flying high with your headphones – electrostatics or dynamics – with the iFiPro iESL. No more background noise, no more distortion. Just smooth, sexy, open audio. Forget the Porsche – just go Pro.
The ‘Perfectly Matched’ headphone experience.
Both classic and cutting edge technology in 3 quality components delivers a perfectly matched listening experience – one-off Pinstripe Permalloy Core Transformer, a Bias Voltage Generator and the Capacitive Battery Power Supply.
Making a transformer with the wide bandwidth and low distortion needed in the iESL is very challenging. To attain this, the custom transformers use complicated hand-wound, multi-section windings with both vertical and horizontal sectioning.
They exceed the standards set by Siemens (Germany) and Peerless (USA). With a bandwidth of < 5Hz to > 60kHz (-3dB), transformers in the iESL far exceed the requirements of even the JAS High-Res logo.
So, what’s a capacitive battery power supply? This means the battery is charged up to the required voltage and then the charger circuit is turned off completely, leaving the capacitor bank to ‘float’ at the required bias voltage.
An essentially perfect bias voltage source with no electronic noise whatsoever at any frequency as the headphones are, in essence, powered by the battery bank and not the mains!
These 1,000Volt rated capacitors are from Germany. The key is the very high insulation resistance and minimal current leakage, as any such leakage causes self-discharge.
The whole capacitor pack has around 35,000,000 kiloOhm insulation resistance, which means that self-discharge time (to 30%) is around 100,000 seconds or 27 hours. You are always listening on battery (not mains) power.
Vishay MELF resistors – complex, costly BUT superior. These resistors provide optimal power rating and pulse load capability. Nothing else comes close.
Good news for your flagship dynamic headphones.
The iESL has an ear-tingling transformer coupled-stage that is not found in other energizers. We reckon its audio performance is unsurpassed. Each and every flagship dynamic headphone, when used through the iESL, enjoys a whole new level of smoothness and airiness.
Every order ships free, no minimums, no restrictions. 99% of orders placed by 4pm EDT go out the same day. We typically ship UPS Ground or USPS Priority Mail, so transit times range from 1-5 days depending on location (we're in NJ). Signature is required upon delivery. If you have any special requests, give us a shout. We're very accomodating.
Tracking info will be provided as soon as we ship.