DualTriode
Addicted to Fun and Learning
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- Oct 24, 2019
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Hello All,
About the termination / load resistors for the headphone dashboard test; I see that the APx555 has 300R, 600R and the default 200k internal input resistors. At 4 volt balanced input across 300R that is 0.0533 Watts or 53.3mw. I can picture a string of low ppm 1206 size surface mount resistors adding up to 300R.
In my DIY bin I found a package of 1/8 Watt Vishay PTF series 30R, 5PPM resistors and soldered together 10 in series for a total of 300R at 4 volts. Plus Mogami XLR cables.
Using a Topping A30Pro
THD+N 0.000092
SINAD 121
Thanks DT
About the termination / load resistors for the headphone dashboard test; I see that the APx555 has 300R, 600R and the default 200k internal input resistors. At 4 volt balanced input across 300R that is 0.0533 Watts or 53.3mw. I can picture a string of low ppm 1206 size surface mount resistors adding up to 300R.
In my DIY bin I found a package of 1/8 Watt Vishay PTF series 30R, 5PPM resistors and soldered together 10 in series for a total of 300R at 4 volts. Plus Mogami XLR cables.
Using a Topping A30Pro
THD+N 0.000092
SINAD 121
Thanks DT