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iFi Audio Zen Phono MM/MC Preamp

iFi Audio
20 In stock
Phono Preamp & Headphone Amp
$189.00
Spec’d to make you smile Unlike any other entry-level phono stage. The ZEN Phono has: MM/MC from 36dB >72dB gain. Super-silent noise floor -151dBV Precise RIAA with Balanced output, performance comparable to +$1k phono stages An intelligent sub-sonic filter. Addresses warp without eliminating bass Hissless whisper Flagship phono amplifiers create their own...
$189.00
Spec’d to make you smile

Unlike any other entry-level phono stage. The ZEN Phono has:

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

Flagship phono amplifiers create their own power supply off the mains, like a mains regenerator. This is fundamental to a well-designed phono stage. Without this, it will struggle to amplify the signal without added noise. This is why phono stages ‘hiss’ so annoyingly.

Unusually, the ZEN Phono has its own high-tech clean power supply. It creates a 1.2MHz power supply (20,000x mains frequency of 60Hz). In this circuit, a 10uF filtering capacitor = 200,000uF at lower, audible frequencies. With serious levels of noise filtration, it performs at the level of classic LC filtering circuits as found in classic tube amplifiers. On its own ‘island’ PCB, it is isolated so there is no noise pollution of the analog stage.

Just super clean +/- 12V DC.

Measured EIN (Equivalent Input Noise) is -151dBV. It is 20dBV quieter than some Stereophile Class A+ phonos which are -131dBV.

Mil-spec RIAA

The EQ circuit uses multiple TDK C0G capacitors in parallel. This is for the 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!

SPECS: Gain settingsMC (v lo)@ MC (lo) MC (hi) MM72dB (+/- 1dB) 60dB (+/- 1dB) 48dB (+/- 1dB) 36dB (+/- 1dB)AI Sub-sonic filterRemedies only the 'warp' in LPsNo negative impact to bass responseMax Output Voltage (RMS)20v RMS bal output into 100k (< 1% THD & N) 13.5V RMS bal output into 600R (< 1% THD & N)Output Impedance:BAL SE200 Ohm resistive 100 Ohm resistiveSignal/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 UNBALEIN (equivalent input noise):0.6nV|/Hz (unweighted) MC lo/vlo 6.5nV|/Hz (unweighted) MM/MC hi-151dBV (A weighted) -141dBV (unweighted) -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 UNBALDimensions158 x117 x35 mm 6.2" x 4.6" x 1.4"Power Supply:DC 5V / 500mANet weight:515g (1.14 Ibs)Warranty:12 months
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