Electronics > Projects, Designs, and Technical Stuff
Yet another Audiophile Question.
TimFox:
Those graphs show power at 1% THD+N, not 0.1%. Do you have the graph for THD vs power at a fixed supply voltage?
tooki:
--- Quote from: TimFox on August 09, 2020, 07:08:22 pm ---Those graphs show power at 1% THD+N, not 0.1%. Do you have the graph for THD vs power at a fixed supply voltage?
--- End quote ---
Figures 6-10, 21, and 25 of the datasheet, for various combinations of VDD, bridging mode, and speaker impedance.
DW1961:
--- Quote from: TimFox on August 09, 2020, 07:08:22 pm ---Those graphs show power at 1% THD+N, not 0.1%. Do you have the graph for THD vs power at a fixed supply voltage?
--- End quote ---
Page 7 in spec sheet:
https://www.ti.com/lit/ds/symlink/tpa3116d2.pdf?ts=1596921462063&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPA3116D2
Image:
TimFox:
By the way, should you measure the THD of these devices, you have two practical problems:
1. In bridged mode, you cannot connect one side of the output to ground, but the THD meter is probably grounded.
2. Even with the low-pass filters in the THD meter, you will probably find that the high-frequency ripple exaggerates the THD, although it is inaudible through the speakers.
Conrad Hoffman:
Maybe OT, but if you want to save tweeters, don't use simple low order crossovers. Again, area under the curve.
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