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      PURIFI EVAL1 Amplifier Stereo set

      € 661,12€ 799,95 10+ In stock
      • -5% Order 2 for only € 759,95 per piece

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      Product description

      The EVAL1 stereo evaluation kit creates effortless signal and power supply connections for a stereo 1ET400A setup. The kit is developed for evaluation purposes, but is perfect suitably for DIY applications.



      • Convenient 2-channel evaluation platform for 1ET400A
      • Balanced analog inputs (XLR) and banana-plug speaker connectors
      • On-board voltage regulators
      • Suitable for DIY projects
      • Two gain options


      Product details

      PURIFI EVAL1 | Eigentakt | Stereo Amplifier Kit 


      The 1ET400A amplifier module yields an audio quality level that sets the standard for power amplifiers of any operating class. The power supply and signal connections, available at the pin header on the1ET400A module, require special attention. This EVAL1 kit provides a buffered input signal and handles the power supply connections for a 1ET400A module in an easy manner.


      The kit is supplied with two 1ET400A amplifier modules, one FE02 stereo front-end module and a power supply cable set. The FE02 front-end module allows you to easily connect a compatible power supply with the supplied cable set. The signal input is connected through XLR. Two pairs of banana-plug speaker connectors allow for easy speaker connections.


      The FE02 front-end module uses dual OPA1612 opamps as pre-gain stage and buffer. The total gain for the EVAL1 (FE02 and 1ET400A) is 27 dB, but can set for a total gain of 14 dB. The opamps receive their supply voltage through a pair of onboard low noise discrete voltage regulators.


      The EVAL1 is compatible with the Hypex SMPS1200A400 configured with unregulated Vaux rails. The supplied cable set has pre-attached connector housings for the FE02 on one end. The other end has pre-crimped terminals with separate connector housings. This allows you to connect the EVAL1 with any compatible power supply. The pre-crimped terminals and supplied JST housings are compatible with the SMPS1200A400.


      Looking for a Eigentakt stereo kit? Checkout this PURIFI EVAL2 Mono Amplifier Kit.


      What’s In The Box?

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      Article number
      Rated power output

      425 watts at 4 ohms
      227 watts at 8 ohms
      450 watts at 2 ohms

      Minimum load
      2 ohms
      > 94%
      Signal-to-noise ratio (SNR)
      131 dB
      0.00017 % THD+N at 20-20,000 Hz, 4 ohms, 100 watts
      Frequency response
      0 - 60,000 Hz
      14 dB / 27dB
      Input sensitivity
      Input impedance
      4.4k ohms (14 dB) / 10.2k ohms (27 dB)
      Amplifier Classification
      Class D
      Circuit Topology
      Speaker output channels
      Input connection type
      Speaker output connection type
      DSP function
      EQ Adjustment
      Power Requirements
      25 - 70 VDC (symmetric supply +/-)
      Power inlet connector
      PCB connector
      Current limit
      25 A
      Under/over voltage protection
      Dimensions (L x W x H)
      142 x 146 x 39 mm
      Mounting hole spacing
      Mounting hole diameter

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      5 from 5Based on 3 reviews
      Review this product
      5 of 5
      Een DIY klasse-D versterker die et etiket High-End waardig is. Makkelijk zelf te in elkaar te steken. Alleen jammer dat op de workshop site (https://alpha-audio.net/videocast/workshop-purifi-eigentakt-eval1-power-amplifier) abusievelijk vermeld wordt dat de jumpers j6 &7 moeten verwijderd worden. Ze moeten anders ingeplugd worden. Zie Application Note – Connecting EVAL1 to SMPS1200A400.
      By Norbert on 8 August 2022
      5 of 5
      Was eigenlijk heel tevreden met mijn versterker (2 keer NC400 en 600N400) maar dit is toch echt nog iets beter. Beter gedefinieerd laag maar ook stemmen vind ik mooier en realistischer. Instrumentenlijntjes zijn ook beter te volgen. Ik stuur de Eval1 direct aan met een OPPO BDP-205 speler en heb de voorversterker niet nodig (bypass deze dus). Rendement van de speakers (ScanSpeak) blijkbaar hoog genoeg.
      By Rob Borggreve on 19 July 2021
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      EVAL1 Amplifier Stereo set
      € 661,12
      € 799,95
      EVAL1 Amplifier Stereo set
      10+ In stock
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