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Monoprice Cavalli Liquid Platinum technical measurements

Discussion in 'Headphone Amplifier Measurements' started by atomicbob, Nov 14, 2018.

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  1. atomicbob

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    Monoprice Cavalli Liquid Platinum technical measurements

    If you are unfamiliar with audio measurements please use a search engine with the query:
    "audio measurements" or "audio measurement handbook"
    Look for publications by Richard C. Cabot and also by Bob Metzler, both from Audio Precision. There are other useful publications as well. These will provide basic knowledge.
    Interpretation of the following measurements is beyond the scope of this post.

    The data presented were collected as follows:

    1. PrismSound dScope III, picoscope 5243B, Micsig DP10013 balanced probe, Keysight 34465A DMM
    2. 300 and 30 ohm loads used for measurements
    3. Balanced cables Canare L-4E6S starquad with Neutrik XLR connectors
    4. Unbalanced cables Worlds Best Cable Gotham GAC-2 RCA
    5. Vaunix Lab Brick USB hub for measurement equipment
    6. Audioquest Forest and Schiit Pyst USB cables used for measurement equipment
    7. Amplifier gain adjusted to 0 dB gain @ 0.775 Vrms 0 dBu
    8. Platinum gain knob at approximately 11:00 to achieve 0 dB gain Bal, 1:00 for 0 dB gain SE
    9. Stock EH6922 tubes used
    10. 36V SMPS for power except where noted
    11. 14 and 16 AWG sheilded power cables used

    Reference data on two headphones:
    HD 650 impedance 300R, sensitivity 98 dB/mW
    HE-500 impedance 38R, sensitivity 89 dB/mW

    SPL levels for above headphones for reference:
    +9 dBu 300R 16.00 mW - 110 dBSPL @ 98dB/mW
    0 dBu 300R 2.00 mW - 101 dBSPL @ 98dB/mW
    -10 dBu 300R 0.20 mW - 91 dBSPL @ 98dB/mW
    -20 dBu 300R 0.02 mW - 81 dBSPL @ 98dB/mW

    +9 dBu 30R 160.00 mW - 110 dBSPL @ 89dB/mW
    0 dBu 30R 20.00 mW - 102 dBSPL @ 89dB/mW
    -10 dBu 30R 2.00 mW - 92 dBSPL @ 89dB/mW
    -20 dBu 30R 0.20 mW - 82 dBSPL @ 89dB/mW

    All testing performed at 0 dBu unless otherwise noted.
    This level is consistent with listening to headphones referenced above at 90 dBSPL average with peaks to 100 dBSPL, if the music has 10 dB Peak to Avg ratio.

    Highlights
    First, well done Dr. Cavalli! This is an excellent addition to the family.
    Square wave response is very near that of the Liquid Crimson, with only a very slight ring on rising and falling edges. Bandwidth is quite wide: DC to > 670 KHz

    The Liquid Platinum provides excellent performance Single Ended in and TRS out, but is much improved SE in and 4-pin 4XF out. If contemplating this amplifier, balanced headphone cables will prove a wise choice. However, this amp is optimized for balanced use. Bal in and 4XF out yields the highest performence LP has to offer.

    Liquid Crimson still has the edge in a few areas such as transient response, but is rare, pretty much unobtainium and Single Ended operation only. Liquid Platinum is mostly at parity with Liquid Crimson running SE, and has the advantage of availablity. Running balanced input and output is measures nearly a dual mono system. Crosstalk is exceptionally low. Residual noise is lowest with fully balanced operation.

    The supplied SMPS works well having low noise in the audio band. Liquid Platinum audio measurements did not demonstrate significant difference between SMPS, SMPS+NoiseNuke and BK1623A LPS. Power supply spectrum measurements did show lower noise for SMPS+NoiseNuke and LPS over the SMPS provided.

    The following LPS is arriving sometime in the next 30 days and will be tested as time permits:
    Zero Zone 36V 1.2A LPS
    https://www.ebay.co.uk/itm/223064418072

    Bottom line
    As with the Liquid Crimson, Liquid Platinum is another amp that won't be departing my acoustic lab inventory.

    Test Data
    Measurements posted are representative of Liquid Platinum's performance but are only a subset of the possible combinations. Consider the following:
    30 measurements per combination
    2 impedances 30R and 300R per combination
    2 input combinations, Bal and SE
    2 output combinations, 4XF and TRS
    3 power supply combinations

    That would be at least 720 measurements total!! Some repeats are often necessary for measurement quality verification. Easily 1200 measurements possible. As it was, 450 were performed and 275 documented over a period of 3 days of intense effort even when aided by scripts and automation. These are the most representative of the combinations possible.

    Test Data Organization
    Post / Topic
    1 introduction
    1 - Bal input to 4XF output 300R load part 1 of 3
    2 - Bal input to 4XF output 300R load part 2 of 3
    3 - Bal input to 4XF output 300R load part 3 of 3
    4 - Bal input to 4XF output 30R load part 1 of 3
    5 - Bal input to 4XF output 30R load part 2 of 3
    6 - Bal input to 4XF output 30R load part 3 of 3
    7 - SE input to TRS output 300R load part 1 of 3
    8 - SE input to TRS output 300R load part 2 of 3
    9 - SE input to TRS output 300R load part 3 of 3
    10 - SE input to TRS output 30R load part 1 of 3
    11 - SE input to TRS output 30R load part 2 of 3
    12 - SE input to TRS output 30R load part 3 of 3
    13 - SE input to 4XF output 300R load part 1 of 3
    14 - SE input to 4XF output 300R load part 2 of 3
    15 - SE input to 4XF output 300R load part 3 of 3
    16 - SE input to 4XF output 30R load part 1 of 3
    17 - SE input to 4XF output 30R load part 2 of 3
    18 - SE input to 4XF output 30R load part 3 of 3
    19 - Power supply comparisons SMPS, SMPS+NoiseNuke, LPS part 1 of 3
    20 - Power supply comparisons SMPS, SMPS+NoiseNuke, LPS part 2 of 3
    21 - Power supply comparisons SMPS, SMPS+NoiseNuke, LPS part 3 of 3
    22 - reserved for possible additional measurements
    23 - reserved for corrections

    FLIR temperature measurements found here

    My personal preferences include listening typically at an average of 75 dB SPL. Assuming a typical Peak to Average ratio of 10 dB puts peaks at 85 dB SPL. This suggests the measurements at -20 dBu represent my experience with HD6x0 and HD800 headphones. Auditory experiences for someone listening 10 dB SPL average higher may diverge from my own experiences.

    editorial - I believe there is a tendency to focus excessively on numbers such as THD attempting to reduce a complex topic to a single number representing a sort of goodness rating. Graphs can present far more data conveying a better understanding of the measurement over a range of frequency, levels, etc. Please don't read too much into the numbers presented. Read the tutorial presented here for a good example of why.

    Picture of the Audio Lab setup for Liquid Platinum measurements
    Liquid_Platinum_measurement_setup_1_small.jpg

    Bal input 4XF output 300 ohm load part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 300R 4XF.png

    Liquid Platinum THD THD+N vs Freq 0dBu 300R
    20181110 LiqPlat THD THD+N vs Freq 300R 4XF.png
    Very even, low distortion across frequencies!!

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 300R 4XF.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 50+7000Hz 0dBu 300R 4XF.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 600+1700Hz 0dBu 300R 4XF.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 300R load
    20181110 LiqPlat 19+20KHz -16dBu 300R 4XF.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 300R load
    20181110 LiqPlat residual noise A=0dB 300R 4XF.png

    Look carefully at that last graph.
    Residual noise is non-existent, with provided SMPS.
    All of the above measurements (and those following) represent engineering excellence.
    Well done Dr. Cavalli!
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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  2. atomicbob

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    Bal input 4XF output 300 ohm load part 2 of 3

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 300R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 100KHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 300R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 5MHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 300R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 100KHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 300R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 5MHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 2 uS / div 300R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 2uS div 5MHz filter 300R - BW calc v2.png
    Bandwidth estimation: BW (MHz) = 0.35 / RT (mS)
    Where RT = 10 to 90% Rise Time
    0.35 / 0.424 mS = 0.826 MHz

    Liquid Platinum amplitude - phase - gain (A01) 300R load
    20181110 LiqPlat A01 amplitude - phase - gain 300R.png

    Liquid Platinum signal to noise (A07) 300R load
    20181110 LiqPlat A07 SNR 300R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD 300R.png

    Liquid Platinum Crosstalk (A08 A09) 300R load
    20181110 LiqPlat A08 A09 Crosstalk 300R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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  3. atomicbob

    atomicbob dScope Yoda

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    Bal input 4XF output 300 ohm load part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 300R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 300R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 300R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 300R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 300R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 300R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 300R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 300R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 300R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 300R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    Bal input 4XF output 30 ohm load part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 30R 4XF.png

    Liquid Platinum THD THD+N vs Freq 0dBu 30R
    20181110 LiqPlat THD THD+N vs Freq 30R 4XF.png

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R 4XF.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 50+7000Hz 0dBu 30R 4XF.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 600+1700Hz 0dBu 30R 4XF.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 30R load
    20181110 LiqPlat 19+20KHz -16dBu 30R 4XF.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load
    20181110 LiqPlat residual noise A=0dB 30R 4XF.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    atomicbob dScope Yoda

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    Bal input 4XF output 30 ohm load part 2 of 3

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 30R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 100KHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 5MHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 30R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 100KHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 5MHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 2 uS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 2 uS div 5MHz filter 30R - BW calc v2.png
    Bandwidth estimation: BW (MHz) = 0.35 / RT (mS)
    Where RT = 10 to 90% Rise Time
    0.35 / 0.443 mS = 0.790 MHz

    Liquid Platinum amplitude - phase - gain (A01) 30R load
    20181110 LiqPlat A01 amplitude - phase - gain 30R.png

    Liquid Platinum signal to noise (A07) 30R load
    20181110 LiqPlat A07 SNR 30R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD 30R.png

    Liquid Platinum Crosstalk (A08 A09) 30R load
    20181110 LiqPlat A08 A09 Crosstalk 30R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    atomicbob dScope Yoda

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    Bal input 4XF output 30 ohm load part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 30R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 30R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 30R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 30R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 30R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 30R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 30R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 30R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 30R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 30R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    SE input TRS output 300 ohm part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 300R TRS.png

    Liquid Platinum THD THD+N vs Freq 0dBu 300R
    20181110 LiqPlat THD THD+N vs Freq 300R TRS.png

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 300R TRS.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 50+7000Hz 0dBu 300R TRS.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 600+1700Hz 0dBu 300R TRS.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 300R load
    20181110 LiqPlat 19+20KHz -16dBu 300R TRS.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 300R load
    20181110 LiqPlat residual noise A=0dB 300R TRS.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    atomicbob dScope Yoda

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    SE input TRS output 300 ohm part 2 of 3

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 300R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 100KHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 300R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 5MHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 300R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 100KHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 300R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 5MHz filter 300R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 200 nS / div 300R load 10 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 200nS div 10MHz filter 300R - BW calc t2.png
    Bandwidth estimation: BW (MHz) = 0.35 / RT (mS)
    Where RT = 10 to 90% Rise Time
    0.35 / 0.508 mS = 0.689 MHz

    Liquid Platinum amplitude - phase - gain (A01) 300R load
    20181110 LiqPlat A01 amplitude - phase - gain 300R.png

    Liquid Platinum signal to noise (A07) 300R load
    20181110 LiqPlat A07 SNR 300R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD 300R.png

    Liquid Platinum Crosstalk (A08 A09) 300R load
    20181110 LiqPlat A08 A09 Crosstalk 300R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    SE input TRS output 300 ohm part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 300R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 300R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 300R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 300R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 300R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 300R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 300R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 300R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 300R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 300R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    SE input TRS output 30 ohm part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 30R TRS.png

    Liquid Platinum THD THD+N vs Freq 0dBu 30R
    20181110 LiqPlat THD THD+N vs Freq 30R TRS.png

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R TRS.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 50+7000Hz 0dBu 30R TRS.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 600+1700Hz 0dBu 30R TRS.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 30R load
    20181110 LiqPlat 19+20KHz -16dBu 30R TRS.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load
    20181110 LiqPlat residual noise A=0dB 30R TRS.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    SE input TRS output 30 ohm part 2 of 3

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 30R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 100KHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 mS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10mS div 5MHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 30R load 100 KHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 100KHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 10 uS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 10uS div 5MHz filter 30R.png

    Liquid Platinum square wave 20 Hz 2 Vpp 2 uS / div 30R load 5 MHz BW
    20181110 SigGen LiqPlat 20 Hz square 2000mVpp 200nS div 20MHz filter 30R - BW calc.png
    Bandwidth estimation: BW (MHz) = 0.35 / RT (mS)
    Where RT = 10 to 90% Rise Time
    0.35 / 0.522 mS = 0.670 MHz

    Liquid Platinum amplitude - phase - gain (A01) 30R load
    20181110 LiqPlat A01 amplitude - phase - gain 30R.png

    Liquid Platinum signal to noise (A07) 30R load
    20181110 LiqPlat A07 SNR 30R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD 30R.png

    Liquid Platinum Crosstalk (A08 A09) 30R load
    20181110 LiqPlat A08 A09 Crosstalk 30R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
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    SE input TRS output 30 ohm part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 30R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 30R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 30R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 30R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 30R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 30R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 30R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 30R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 30R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 30R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #12
  13. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 300 ohm part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 300R 4XF.png

    Liquid Platinum THD THD+N vs Freq 0dBu 300R
    20181110 LiqPlat THD THD+N vs Freq 300R 4XF.png

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 300R 4XF.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 50+7000Hz 0dBu 300R 4XF.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 300R load
    20181110 LiqPlat 600+1700Hz 0dBu 300R 4XF.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 300R load
    20181110 LiqPlat 19+20KHz -16dBu 300R 4XF.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 300R load
    20181110 LiqPlat residual noise A=0dB 300R 4XF - SMPS.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #13
  14. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 300 ohm part 2 of 3

    Liquid Platinum amplitude - phase - gain (A01) 300R load
    20181110 LiqPlat A01 amplitude - phase - gain 300R.png

    Liquid Platinum signal to noise (A07) 300R load
    20181110 LiqPlat A07 SNR 300R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 300R load
    20181110 LiqPlat A04 THD+N THD nth-HD 300R.png

    Liquid Platinum Crosstalk (A08 A09) 300R load
    20181110 LiqPlat A08 A09 Crosstalk 300R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #14
  15. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 300 ohm part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 300R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 300R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 300R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 300R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 300R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 300R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 300R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 300R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 300R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 300R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #15
  16. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 30 ohm part 1 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD FFT 30R 4XF.png

    Liquid Platinum THD THD+N vs Freq 0dBu 30R
    20181110 LiqPlat THD THD+N vs Freq 30R 4XF.png

    Liquid Platinum 1 KHz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R 4XF.png

    Liquid Platinum 50 Hz + 7000 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 50+7000Hz 0dBu 30R 4XF.png

    Liquid Platinum 600 Hz + 1700 Hz spectrum Left and Right 0dBu 30R load
    20181110 LiqPlat 600+1700Hz 0dBu 30R 4XF.png

    Liquid Platinum IMD spectrum Left and Right -16dBu 30R load
    20181110 LiqPlat 19+20KHz -16dBu 30R 4XF.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load
    20181110 LiqPlat residual noise A=0dB 30R 4XF.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #16
  17. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 30 ohm part 2 of 3

    Liquid Platinum amplitude - phase - gain (A01) 30R load
    20181110 LiqPlat A01 amplitude - phase - gain 30R.png

    Liquid Platinum signal to noise (A07) 30R load
    20181110 LiqPlat A07 SNR 30R.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) 30R load
    20181110 LiqPlat A04 THD+N THD nth-HD 30R.png

    Liquid Platinum Crosstalk (A08 A09) 30R load
    20181110 LiqPlat A08 A09 Crosstalk 30R.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #17
  18. atomicbob

    atomicbob dScope Yoda

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    SE input 4XF output 30 ohm part 3 of 3

    Liquid Platinum Frequency Response and Interchannel Phase pg 1/2 30R load
    G2_L1T2_1_A.png

    Liquid Platinum Frequency Response and Interchannel Phase pg 2/2 30R load
    G2_L1T2_1_B.png

    Liquid Platinum Gain vs Amplitude Left 30R load
    G2_L1T3_1_A.png

    Liquid Platinum Gain vs Amplitude Right 30R load
    G2_L1T3_1_B.png

    Liquid Platinum THD+N vs Frequency Left 30R load
    G2_L1T6_1_A.png

    Liquid Platinum THD+N vs Frequency Right 30R load
    G2_L1T6_1_B.png

    Liquid Platinum THD+N vs Amplitude Left 30R load
    G2_L1T7_1_A.png

    Liquid Platinum THD+N vs Amplitude Right 30R load
    G2_L1T7_1_B.png

    Liquid Platinum Crosstalk Left to Right vs Frequency 30R load
    G1_L1T11_1.png

    Liquid Platinum Crosstalk Right to Left vs Frequency 30R load
    G0_L1T12_1.png
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #18
  19. atomicbob

    atomicbob dScope Yoda

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    SMPS - NoiseNuke - LPS comparison part 1 of 3

    Please see warning concerning LPS     here

    Picture of the Audio Lab setup for Liquid Platinum LPS measurements
    Liquid_Platinum_measurement_setup_3_LPS_small.jpg

    SE input 4XF output 30 ohm load power supply comparison

    Liquid Platinum 1 KHz THD+N THD FFT 0dBu 30R load SE-4XF - SMPS supplied
    20181110-01 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R SE-4XF - SMPS.png

    Liquid Platinum 1 KHz THD+N THD FFT 0dBu 30R load SE-4XF - SMPS + Noise Nuke
    20181110-02 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R SE-4XF - NoiseNuke.png

    Liquid Platinum 1 KHz THD+N THD FFT 0dBu 30R load SE-4XF - BK1623A LPS
    20181110-03 LiqPlat 1 KHz THD+N THD FFT 0dBu 30R SE-4XF - LPS.png


    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load - SMPS supplied
    20181110-07 LiqPlat residual noise A=0dB 30R SE-4XF - SMPS.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load - SMPS + Noise Nuke
    20181110-08 LiqPlat residual noise A=0dB 30R SE-4XF - NoiseNuke.png

    Liquid Platinum residual noise spectrum Left and Right A=0dB 30R load - BK1623A LPS
    20181110-09 LiqPlat residual noise A=0dB 30R SE-4XF - LPS.png
     
    Last edited: Nov 30, 2018
    atomicbob, Nov 14, 2018
    #19
  20. atomicbob

    atomicbob dScope Yoda

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    SMPS - NoiseNuke - LPS comparison part 2 of 3

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load - SMPS supplied
    20181110-07 LiqPlat A04 THD+N THD nth-HD FFT 30R SE-4XF - SMPS.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load - SMPS + Noise Nuke
    20181110-08 LiqPlat A04 THD+N THD nth-HD FFT 30R SE-4XF - NoiseNuke.png

    Liquid Platinum THD+N THD nth harmonic distortion (A04) FFT 0dBu 30R load - BK1623A LPS
    20181110-09 LiqPlat A04 THD+N THD nth-HD FFT 30R SE-4XF - LPS.png

    Liquid Platinum THD THD+N vs Freq 30R load SE-4XF - SMPS supplied
    20181110-10 LiqPlat THD THD+N vs Freq 30R SE-4XF - SMPS.png

    Liquid Platinum THD THD+N vs Freq 30R load SE-4XF - SMPS + Noise Nuke
    20181110-11 LiqPlat THD THD+N vs Freq 30R SE-4XF - NoiseNuke.png

    Liquid Platinum THD THD+N vs Freq 30R load SE-4XF - BK1623A LPS
    20181110-12 LiqPlat THD THD+N vs Freq 30R SE-4XF - LPS.png

    Difference between SMPS, SMPS+NoiseNuke and LPS has negligible effect on Liquid Platinum output in the audio band.
     
    Last edited: Nov 14, 2018
    atomicbob, Nov 14, 2018
    #20
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