Measurement's report Pro-Ject Pre Box S2 Digital - Reference Audio Analyzer

News and Reviews Reports of measured products Comparison and selection About RAA

Login Password
You are logged in as guest
Setting Register Forgot your password?

Navigating through reports of Pro-Ject Pre Box S2 Digital (Click to open)
Pro-Ject Pre Box S2 Digital is available in reports and services. You are in a professional report.

Information for entry level users

Information for all

Versus of characteristics

Information for professionals
    reports for a pro (Headphone amplifier)
    reports for a pro (DAC Line Out)
    Comparison of on-line graphs


    Quick jump to the schedules in this pro report: Pre Box S2 Digital
      Spectra vs Amplitude

      Pro-Ject Pre Box S2 Digital

      About this report
      This is a report for professionals with a suite of test of headphone amplifier.
      You can see a simple report for "dummies" with explanations of the main characteristics for Pro-Ject Pre Box S2 Digital

      A suite of tests for a headphone amplifier can be applied to just a universal output without a formal presence of an amplifier, if in this mode you can connect headphones to this output. Based on the results of the tests, you can understand the real picture, is the output powerful enough or not, with the initial data on the circuitry as a "black box".

      Line-out, differences from the output for headphones and speakers

      Advantages and disadvantages of balanced amplifiers

      Test report - general data Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Frequency response, Impedance and Frequency response with standard headphones

      Your browser does not support Canvas

      Voltage levels from the load at the output of the amplifier

      Your browser does not support Canvas

      Average value of impedance band in 40 Hz - 15 kHz0.1ohm
      Voltage:
      Linear Mode / Maximum or before clipping level       		5.9/5.9dBV
      2.0/2.0VRMS
      Current:
      Linear Mode / Maximum or before clipping level      		14.8/34.9dB(mA)
      5.5/55.6mA





      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.





      Frequency response Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Range

      Channel:LeftRight
      Variation in frequency response in band from 40 Hz - 15 kHz -0.1, +0.0-0.1, +0.0dB



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

      On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



      Impedance Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Channel:LeftRight
      Impedance average in band from 40 Hz - 15 kHz0.1 0.1ohm
      The minimum value in band from 40 Hz - 15 kHz0.1 0.1ohm
      The maximum value in band from 40 Hz - 15 kHz0.2 0.2ohm


      Comparison of basic characteristics AMPs


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



      Crosstalk Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Range

      Load

      Channel:LeftRight
      Crosstalk @ 1 kHz @ 15.8 ohm -64.8 -63.3dB
      Crosstalk @ 1 kHz @ 24.5 ohm -68.3 -66.8dB
      Crosstalk @ 1 kHz @ 30.5 ohm -70.5 -68.7dB
      Crosstalk @ 1 kHz @ 62.4 ohm -76.7 -75.4dB
      Crosstalk @ 1 kHz @ 100.0 ohm -80.3 -78.1dB
      Crosstalk @ 1 kHz @ 198.9 ohm -86.4 -84.9dB
      Crosstalk @ 1 kHz @ 300.0 ohm -90.1 -88.2dB
      Crosstalk @ 1 kHz @ 763.0 ohm -94.2 -93.6dB
      Crosstalk @ 1 kHz @ Not loaded-101.8 -97.8dB



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



      Crosstalk Phase Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Load




      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



      Frequency response Pro-Ject Pre Box S2 Digital with resistive load

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Range

      Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
      Channel:LeftRight
      TEST 16 ? + Pro-Ject Pre Box S2 Digital 0.10.1dB
      TEST 32 ? + Pro-Ject Pre Box S2 Digital 0.00.1dB
      TEST 64 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB
      TEST 126 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB
      TEST 256 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB
      TEST 512 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

      On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



      Frequency response Pro-Ject Pre Box S2 Digital loaded dynamic headphone type

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Range

      Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
      Channel:LeftRight
      TEST 10000 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB
      Grado GH4 Limited Edition + Pro-Ject Pre Box S2 Digital 0.00.1dB



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

      On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



      Frequency response Pro-Ject Pre Box S2 Digital loaded type balance armature headphone type

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Range

      Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
      Channel:LeftRight
      TEST 10000 ? + Pro-Ject Pre Box S2 Digital 0.00.0dB
      Campfire Audio Andromeda + Pro-Ject Pre Box S2 Digital 0.20.2dB
      Fearless Audio S8F Freedom + Pro-Ject Pre Box S2 Digital 0.20.2dB



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

      On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



      THD vs load vs output voltage Pro-Ject Pre Box S2 Digital

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Load

      Harmonic, number

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Load

      Harmonic, number

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Load


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



      Maximum voltage output level vs load Pro-Ject Pre Box S2 Digital

      Your browser does not support Canvas
      Graphics setting view
      Type of chart

      RAW coordinates

      Power characteristics of the Voltage Current
      dBVVRMSdB(mA)mA
      Equivalent class A 5.92.014.85.5
      Equivalent class AB 5.92.034.955.6
      Equivalent class B 5.92.034.955.6
      Maximum mode 5.92.034.955.6


      Volume Control TypeDigital
      Optimal range of volume control49.0dB
      Signal/Noise / Maximum119.0/5.9dB/dBV
      Signal/Noise @ -14.9 dBV 32 ohm (1 mW)98.17dB
      Signal/Noise @ -5.2 dBV 300 ohm (1 mW)107.86dB


      Comparison Pro-Ject Pre Box S2 Digital and another amplifiers by loudness (Volume Level)

      Main characteristics of the Pro-Ject Pre Box S2 Digital


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



      Maximum voltage output level vs load Pro-Ject Pre Box S2 Digital

      Your browser does not support Canvas
      Graphics setting view
      Type of chart

      RAW coordinates

      Maximum Amplifier Voltage Level
      Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
      dBVVRMSdBVVRMSdBVVRMSdBVVRMS
      15.8 ohm -21.10.1-1.10.1-1.10.1-1.10.1
      24.5 ohm -16.10.20.90.20.90.20.90.2
      30.5 ohm -15.10.21.90.21.90.21.90.2
      62.4 ohm -10.10.33.90.33.90.33.90.3
      100 ohm -6.10.54.90.54.90.54.90.5
      198.9 ohm 0.91.15.91.15.91.15.91.1
      300 ohm 3.91.65.91.65.91.65.91.6
      763 ohm 5.92.05.92.05.92.05.92.0
      Not loaded5.92.05.92.05.92.05.92.0



      Maximum level of amplifier current
      Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
      dB(mA)mAdB(mA)mAdB(mA)mAdB(mA)mA
      15.8 ohm 14.95.534.955.534.955.534.955.5
      24.5 ohm 16.16.433.145.233.145.233.145.2
      30.5 ohm 15.25.832.240.732.240.732.240.7
      62.4 ohm 14.05.028.025.128.025.128.025.1
      100 ohm 13.95.024.917.624.917.624.917.6
      198.9 ohm 14.95.619.99.919.99.919.99.9
      300 ohm 14.45.216.46.616.46.616.46.6
      763 ohm 8.32.68.32.68.32.68.32.6


      Power
      Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
      dBmmWdBmmWdBmmWdBmmW
      15.8 ohm -3.10.516.948.716.948.716.948.7
      24.5 ohm -0.01.017.050.017.050.017.050.0
      30.5 ohm 0.01.017.050.617.050.617.050.6
      62.4 ohm 1.91.615.939.415.939.415.939.4
      100 ohm 3.92.514.931.014.931.014.931.0
      198.9 ohm 7.96.212.919.612.919.612.919.6
      300 ohm 9.18.211.113.011.113.011.113.0
      763 ohm 7.15.17.15.17.15.17.15.1



      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



         

      Spectrum of Total Harmonic Distortion vs Level Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBm

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBV

      Range




      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



         

      Spectrum of Multitone Distortion vs Level vs Load Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBm

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBV

      Range


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



         

      Spectrum of IMD SMPTE vs Level Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      Range

      dBm

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      Range

      dBV

      Range


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.



         

      Spectrum of IMD CCIF vs Level Pro-Ject Pre Box S2 Digital (as headphone amplifier)

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Level

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBm

      Range

      Your browser does not support Canvas
      Graphics setting view
      Channel

      Shift

      dBV

      Range


      Brief information

      Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.





      More detailed

      Measurements of Pro-Ject Pre Box S2 Digital were carried out by Roman Kuznetsov on the hardware-software complex RAA.

      The Pro-Ject Pre Box S2 Digital test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

      I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.




      Kuznetsov Roman
      Founder of RAA



      Known by the nickname romanrex
      Аuthor of articles iXBT.com



      Information for Authors. You can freely use the graphics in your articles with a link to us.







      Original text in Russian page. Translation page is not yet ready

      You can help with translation via the: facebook and feedback.