Measurement's report Creative SoundBlaster Zx - Reference Audio Analyzer

Creative SoundBlaster Zx

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 Creative SoundBlaster Zx

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 Creative SoundBlaster Zx (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

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Voltage levels from the load at the output of the amplifier

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Average value of impedance band in 40 Hz - 15 kHz18.1ohm
Voltage:
Linear Mode / Maximum or before clipping level
6.2/6.2dBV
2.0/2.0VRMS
Current:
Linear Mode / Maximum or before clipping level
13.7/33.6dB(mA)
4.9/47.9mA





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Frequency response Creative SoundBlaster Zx (as headphone amplifier)

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Channel

Range

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



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



Impedance Creative SoundBlaster Zx (as headphone amplifier)

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Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz17.9 18.2ohm
The minimum value in band from 40 Hz - 15 kHz17.9 18.2ohm
The maximum value in band from 40 Hz - 15 kHz17.9 18.2ohm


Comparison of basic characteristics AMPs


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Crosstalk Creative SoundBlaster Zx (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -87.6 -89.5dB
Crosstalk @ 1 kHz @ 24.5 ohm -76.2 -77.6dB
Crosstalk @ 1 kHz @ 30.5 ohm -70.5 -71.0dB
Crosstalk @ 1 kHz @ 62.4 ohm -65.0 -65.3dB
Crosstalk @ 1 kHz @ 100.0 ohm -63.8 -64.1dB
Crosstalk @ 1 kHz @ 198.9 ohm -62.8 -63.0dB
Crosstalk @ 1 kHz @ 300.0 ohm -63.3 -63.8dB
Crosstalk @ 1 kHz @ 763.0 ohm -61.7 -62.0dB
Crosstalk @ 1 kHz @ Not loaded-60.7 -60.9dB



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Crosstalk Phase Creative SoundBlaster Zx (as headphone amplifier)

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Load




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Frequency response Creative SoundBlaster Zx with resistive load

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Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + Creative SoundBlaster Zx 0.00.0dB
TEST 32 ? + Creative SoundBlaster Zx 0.00.0dB
TEST 64 ? + Creative SoundBlaster Zx 0.00.0dB
TEST 126 ? + Creative SoundBlaster Zx 0.00.0dB
TEST 256 ? + Creative SoundBlaster Zx 0.00.0dB
TEST 512 ? + Creative SoundBlaster Zx 0.00.0dB



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



Frequency response Creative SoundBlaster Zx loaded dynamic headphone type

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Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + Creative SoundBlaster Zx 0.00.0dB
Grado GH4 Limited Edition + Creative SoundBlaster Zx 2.52.4dB



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



Frequency response Creative SoundBlaster Zx loaded type balance armature headphone type

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Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + Creative SoundBlaster Zx 0.00.0dB
Campfire Audio Andromeda + Creative SoundBlaster Zx 10.810.8dB
Fearless Audio S8F Freedom + Creative SoundBlaster Zx 8.57.9dB



Brief information

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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 Creative SoundBlaster Zx

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Load

Harmonic, number

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Load

Harmonic, number

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Load


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Maximum voltage output level vs load Creative SoundBlaster Zx

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A 6.22.013.74.9
Equivalent class AB 6.22.033.647.9
Equivalent class B 6.22.033.647.9
Maximum mode 6.22.033.647.9


Volume Control TypeDigital
Optimal range of volume control46.0dB
Signal/Noise / Maximum116.0/6.2dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)98.72dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)105.05dB


Comparison Creative SoundBlaster Zx and another amplifiers by loudness (Volume Level)

Main characteristics of the Creative SoundBlaster Zx


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Maximum voltage output level vs load Creative SoundBlaster Zx

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Maximum Amplifier Voltage Level
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBVVRMSdBVVRMSdBVVRMSdBVVRMS
15.8 ohm -20.40.1-2.40.1-2.40.1-2.40.1
24.5 ohm -15.60.20.40.20.40.20.40.2
30.5 ohm -17.90.11.10.11.10.11.10.1
62.4 ohm -10.00.34.00.34.00.34.00.3
100 ohm -9.20.34.80.34.80.34.80.3
198.9 ohm -2.50.75.50.75.50.75.50.7
300 ohm 4.71.75.71.75.71.75.71.7
763 ohm 6.02.06.02.06.02.06.02.0
Not loaded6.22.06.22.06.22.06.22.0



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 15.66.033.647.933.647.933.647.9
24.5 ohm 16.66.732.642.532.642.532.642.5
30.5 ohm 12.44.231.437.031.437.031.437.0
62.4 ohm 14.15.128.125.428.125.428.125.4
100 ohm 10.83.524.817.324.817.324.817.3
198.9 ohm 11.53.819.59.419.59.419.59.4
300 ohm 15.25.716.26.416.26.416.26.4
763 ohm 8.42.68.42.68.42.68.42.6


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm -2.40.615.636.315.636.315.636.3
24.5 ohm 0.51.116.544.316.544.316.544.3
30.5 ohm -2.80.516.241.816.241.816.241.8
62.4 ohm 2.11.616.140.316.140.316.140.3
100 ohm 0.81.214.830.014.830.014.830.0
198.9 ohm 4.52.812.517.712.517.712.517.7
300 ohm 9.99.910.912.410.912.410.912.4
763 ohm 7.25.27.25.27.25.27.25.2



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Spectrum of Total Harmonic Distortion vs Level Creative SoundBlaster Zx (as headphone amplifier)

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dBm

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Spectrum of Multitone Distortion vs Level vs Load Creative SoundBlaster Zx (as headphone amplifier)

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Spectrum of IMD SMPTE vs Level Creative SoundBlaster Zx (as headphone amplifier)

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Spectrum of IMD CCIF vs Level Creative SoundBlaster Zx (as headphone amplifier)

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More detailed

Measurements of Creative SoundBlaster Zx were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Creative SoundBlaster Zx 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.



SoundBlaster Zx was given for tests by Creative






Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com



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