Good news for your flagship dynamic headphones.

The iESL has an ear-tingling transformer coupled-stage that is not found in other energisers.

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.

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.

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!

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.

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.