The iCAN PHANTOM is an extraordinarily powerful headphone amplifier, capable of delivering more than 15,000mW from its balanced outputs and more than 5,760mW from its single-ended outputs in a 16-ohm load. In terms of voltage, it can supply more than 27V into a 600-ohm load; when it comes to electrostatic headphones delivers up to 640V.

Three gain settings – 0dB, 9dB and 18dB – enable the amp to precisely match the connected headphones. Unity gain (0dB) is useful to ensure low noise with more sensitive headphones and IEMs, while the higher gain settings make the most of tougher headphone loads, delivering excellent dynamic headroom.

For dynamic and planar headphones and IEMs.

The iCAN PHANTOM sports several unique features that set it apart from other headphone amps. One such facility is the incorporation of two input stages – one valve/tube-based, the other solid state – enabling the user to switch between the two in real time. These input stages are entirely separate, which means they can be kept short and direct for optimal purity rather than complicating the signal path (for example, by switching valves in and out of a single circuit).

The fully discrete Class A solid-state input stage uses J-FETs, while the all-valve Class A circuit features a hand-selected, computer-matched pair of General Electric 5670 tubes, a premium variant of the 6922 tube. This stage has two user-selectable modes – Tube and Tube+. The latter minimises overall loop-gain and thus negative feedback, giving a different trade-off between the tube’s natural harmonics and the transient performance.

Balanced circuit design has long been considered a righteous path to audio excellence in high-end amp design, but the term ‘balanced’ is used in different ways and does not always mean the same thing. The iCAN PHANTOM takes balanced circuit design to the extreme – fully differential from input to output, minimising noise and crosstalk in the signal path for ultimate sonic purity.

Essentially, ‘fully differential’ circuit design – or True Differential Balanced, as we call it – means that each channel (left and right) is fully separated in the circuit design, and each of these channels has two separate signals of equal level but opposite polarity (positive and negative). This requires four separate amp circuits, two for the left channel and two for the right channel – much more costly and complex to implement than single-ended circuit designs, but the sonic dividends are hugely worthwhile.

The iCAN PHANTOM’s True Differential Balanced circuitry is coupled to a volume control with six decks – two decks for each channel (positive and negative) with the final two decks used for monitoring the volume control operation. The motorised volume control potentiometer is custom-made by ALPS in Japan and is of exceptional quality.