Cookie-Cutter ‘Sub-Sonic Filter’

Tom Evans who makes very nice phono stages made the following astute comment:

A rumble filter simply adds to the bass cut making your already “cut” records sound bass light. Plus, it “time-steps” the bass in relation to the higher frequencies (where our hearing is most sensitive) so much so it can confuse the ear into believing the bass is playing out of tempo.

iFi solution:

Since the very first iPHONO launched in 2012, we have used our own in-house ‘Subsonic Filter’. It made it into the iPHONO2 and the iPHONO3 and now, the ZEN Phono which is the very first time this filter is seen in such an affordable price level.

As there is only minimal vertical modulation remaining at very low frequencies with an an actual cut LP that is playable, we know that “vertical modulation” at low frequencies must be warp.

So we designed a filter to take advantage of this.

This is not artificial but real knowledge. By understanding fully how LPs are cut and replayed,  it is possible to filter record warp strongly without at the same time attenuating low bass or adding group delay.

iPower Elite
iPower Elite
iPower Elite from iFi audio
iPower Elite from iFi audio
Quiet as a battery. None of the hassle.

<1uV noise floor. Active Noise Cancellation2.

Talk about tech

Beneath the extruded aircraft-grade aluminium chassis is serious hardcore technology:

  • 60W high performance adaptive multi-mode controller, optimized for high efficiency, low standby power, and audio noise free design
  • Frequency shuffling technique to achieve excellent EMI performance
  • 400% increase in power supply capacitance for the adaptive multi-mode controller
  • Oversized Power MOSFET
  • Low-leakage transformer
  • RF designed PCB
iPower Elite from iFi audio

Elite design & specs

The iPower Elite has:

  • <1uV noise floor
  • Special circuit design for whisper-quiet noise floor using cherry-picked components
  • Latest Active Noise Cancellation 2
  • Full unibody Aluminium chassis with heatsink built-in

Powering flagships.

Expensive equipment typically ship with generic power supplies. This is like putting supermarket fuel in a Ferrari. It deserves the best but isn’t getting it.

The generic SMPS power supply (PS) is very noisy.  Many upgraded audiophile linear PS are better, but still have huge noise at the rectification frequencies and at multiples 50Hz, 100Hz, 150Hz (or 60, 120, 180 for 60Hz countries) etc.

The iPower Elite was designed to deliver the smooth and silent power. It gives your streamer/DAC/amplifier all the silent, clean power of a battery with none of the hassle.

Majestic measurements

iPower Elite: 1μV
Audiophile Linear Power Supply: 100μV
Typical Power Supply: 1,000μV

1,000x

lower

Based on military tech, our improved Active Noise Cancellation II®  actively cancels all incoming noise.

It does this in a similar way to active noise-cancelling headphones – it generates a signal identical to that of the incoming electrical noise but in the opposite phase, actively cancelling it out. This is highly effective at removing low- and mid-frequency noise, while passive insulating filters deal with higher frequency interference. This combination is measurably more effective at eradicating noise corrupting the USB signal than devices relying solely on passive filtering.

It works with virtually any DC powered device and comes in 5, 12, 15 and 24 volts.

Clean, better than audiophile-grade power.

Support

Input100-240VAC (50-60Hz/1.5A)
Output5V/5.0A; 12V/4.0A; 15V/3.5A; 24V/2.5A
Output plug5.5x2.5mm (incl white Reverse Polarity Plug)
Noise floor*<1uV
Dimensions148 x 55 x 50 mm
5.8" x 2.2" x 1.3"
Weight550 g (1.2 Ibs)
Warranty period12 months
*Specifications are subject to change without notice.

Reviews

Better than SBooster linear power supply!

I tested it against the 400 dollar mkii sBooster linear Power supply. It was cleaner faster and more transparent.
(Click name to read original review)
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