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Powersoft K3, K20, M50Q (Part II)
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<blockquote data-quote="Langston Holland" data-source="post: 48920" data-attributes="member: 171"><p>Re: Powersoft Digam K3, K20, M50Q (Part 2d)</p><p></p><p><strong>Short Term Tests</strong>:</p><p></p><p>I used CLIO's "slow" gate sine burst module measure the amps' short term maximum output capability. "Slow" in this case means the longest stimulus period available (green trace). The period used varies between about 12ms and 14ms down to about 250Hz and then transitions to 4 wavelengths under about 160Hz. Audiomatica calls these periods the "meter on time". When you see small zig-zags in the THD traces, it's generally due to these small transitions in the stimulus burst period, not artifacts within the DUT.</p><p></p><p><u>CLIO Stimulus Burst Period or Meter On Time</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_MeterOnTime.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I have found this a magnificent tool for finding the peak output capability of loudspeakers in all passbands and it coincides perfectly in the subwoofer region with what I consider the reference standard: Don Keele's 6.5 cycle tone bursts. This module also changed the world for me in finding the ideal limiter settings for any given amplifier/loudspeaker combination.</p><p></p><p><u>K20 Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_K20.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u>K3 Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_K3.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u>M50Q Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_M50Q.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u>FP14000 Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_FP14000.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u>IT8000 Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_IT8000.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u>PL380 Max ST Output</u>:</p><p></p><p><img src="http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_PL380.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>(End Part 2d)</p></blockquote><p></p>
[QUOTE="Langston Holland, post: 48920, member: 171"] Re: Powersoft Digam K3, K20, M50Q (Part 2d) [B]Short Term Tests[/B]: I used CLIO's "slow" gate sine burst module measure the amps' short term maximum output capability. "Slow" in this case means the longest stimulus period available (green trace). The period used varies between about 12ms and 14ms down to about 250Hz and then transitions to 4 wavelengths under about 160Hz. Audiomatica calls these periods the "meter on time". When you see small zig-zags in the THD traces, it's generally due to these small transitions in the stimulus burst period, not artifacts within the DUT. [U]CLIO Stimulus Burst Period or Meter On Time[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_MeterOnTime.png[/IMG] I have found this a magnificent tool for finding the peak output capability of loudspeakers in all passbands and it coincides perfectly in the subwoofer region with what I consider the reference standard: Don Keele's 6.5 cycle tone bursts. This module also changed the world for me in finding the ideal limiter settings for any given amplifier/loudspeaker combination. [U]K20 Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_K20.png[/IMG] [U]K3 Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_K3.png[/IMG] [U]M50Q Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_M50Q.png[/IMG] [U]FP14000 Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_FP14000.png[/IMG] [U]IT8000 Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_IT8000.png[/IMG] [U]PL380 Max ST Output[/U]: [IMG]http://soundscapesweb.com/files/PSW/AmpTests4/CLIO_PL380.png[/IMG] (End Part 2d) [/QUOTE]
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