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Leptoni DT-Alpha Measurements

Discussion in 'Power Amps' started by purr1n, Jun 2, 2018.

  1. purr1n

    purr1n Desire for betterer is endless.

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    All into 330ohm load. Output was set to 2V out and used volume knob to get 0.550V
    leptoni 60Hz -2.97dBU-1.jpg
    leptoni 1kHz -2.97dBU-1.jpg

    Output (dBU) vs THD+N
    Wanted to find out where it started to clip. I'll let you guys do the math, e.g dBU to V to power at 330ohms.
    leptoni 1kHz 330ohm load-1.jpg
     
    purr1n, Jun 2, 2018
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  2. skem

    skem Friend

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    1% THD+N @ 4 Volts into 330ohms = 48 mW?

    Should one expect the FFT harmonic pattern (relative heights) to change if the load resistance is significantly decreased, say to 50 ohms?
     
    skem, Jun 2, 2018
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  3. purr1n

    purr1n Desire for betterer is endless.

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    Yes and no. For same voltage yes, but we wouldn't need such high voltage at 50 ohms for same SPL output, unless using something inefficiently like HE-6.
     
    purr1n, Jun 2, 2018
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  4. Vtory

    Vtory Audiophile™

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    Marv, can you please measure AF with the same setting? Just curious how two will differ in measurements.
     
    Vtory, Jun 2, 2018
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  5. Bill-P

    Bill-P Level 42 Mad Wizard

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    Looks fairly clean to me even down to 50Hz. Still mostly just 2nd and 3rd order distortion.

    I'd second AF measurements with the same settings just for fun and giggles. Also if you have time, maybe do ZD, too?
     
    Bill-P, Jun 5, 2018
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