iFi Zen Phono

IFi Zen Phono Features

• MM/MC from 36dB >72dB gain. Super-silent noise floor -151dBV
• Precise RIAA with Balanced output, performance comparable to +$1k phono stages
• AI sub-sonic filter. Addresses warp without eliminating bass or causing phase issues

Mil-spec RIAA
The EQ circuit uses multiple TDK C0G capacitors in parallel. This is for best stability and the least distortion. They beat polystyrene capacitors and are close to Teflon.

Already using the lowest tolerance capacitors combined with multiples in parallel, tolerance is exponentially improved by the square root of the number of capacitors. This is quite a natty circuit design.

The RIAA EQ tolerance level (+/- 0.15dB) is impressive as it is en par with hand-selected capacitors!

With great circuit comes great components
The ZEN Phono has some seriously good audio components backing up the fab circuit design which has trickled-down from its ultra-fidelity AMR PH-77 and iFi iPhono siblings.

Super sub-sonic
The intelligent sub-sonic filter is from the iPhono range and is quite special.

Normal sub-sonic filters remove ‘rumble’ AND bass and cause phase issues.

Our unique AI phono sub-sonic filter removes ‘rumble’ only.

Technical Specification

• Gain settings
  MC (v lo)@ - 72dB (+/- 1dB)
  MC (lo) - 60dB (+/- 1dB)
  MC (hi) - 48dB (+/- 1dB)
  MM - 36dB (+/- 1dB)
  
• AI Sub-sonic filter (Remedies only the 'warp' in LPs)
  No negative impact to bass response
  
• Output Impedance
  BAL - 200 Ohm resistive
  SE - 100 Ohm resistive
  
• Input impedance
  MM: 47K Ohms (Load: 110pF)
  MC High: 47K Ohms
  MC Low: 1K Ohms
  MC V Low: 110 Ohms
  
• Signal/Noise Ratio
  94dB(A) MM re 2V BAL/1V UNBAL
  80dB(unweighted 80kHz BW) MM re 2V BAL/1V UNBAL
  84dB(A) MC Hi re 2V BAL/1V UNBAL
  71dB(unweighted 80kHz BW) MM re 2V BAL/1V UNBAL
  90dB(A) MC lo re 2V BAL/1V UNBAL
  79dB(unweighted 80kHz BW) MC lo re 2V BAL/1V UNBAL
  79dB(A) MC vlo re 2V BAL/1V UNBAL
  69dB(unweighted 80kHz BW) MC vlo re 2V BAL/1V UNBAL
  
• EIN (equivalent input noise)
  0.6nV|/Hz (unweighted) MC lo/vlo - -151dBV (A weighted)
                                                            -141dBV (unweighted)
  6.5nV|/Hz (unweighted) MM/MC hi - -130dBV (A weighted)
                                                              -119dBV (unweighted)
  
• Harmonic Distortion
  < -110dB / 0.0003% MM re 2V BAL/1V UNBAL
  < -80dB / 0.01% MC lo re 2V BAL/1V UNBAL
  < -86dB / 0.005% MC vlo re 2V BAL/1V UNBAL
  
• Dimensions
  160(l) x 113(w) x 35(h) mm
  6.3" x 4.4" x 1.4"
  
• Power Supply
  DC 5V / 500mA
  
• Net weight
  515g (1.14 Ibs)
  

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