Hi folks,
I recently got Aiyima D03 and found it has bass drop.
I have BEHRINGER UMC22 soundcard and made some voltage reducer scheme for it (according to 3kOhm XLR input of soundcard): 20kOhm resistor in series and 2.7kOhm resistor in parallel (scheme was calculated for 11.34 volt and 16W output).
When I turn on Aiyima at 0 volume all is ok, but when I increase volume by 1 step, Clip lamp in UMC22 starts to flash. I suppose voltage still too high for it and I made a mistake in resistor calculation
Could you please help me:
1) Can I measure freq response of Aiyima, using USB audio as input? I use CoolEdit / Adobe Audition to watch my results.
2) What was my mistake in scheme? Reducer should compress signal to 0.75V, here is formula:
where ZL is 3kOhm impedance of mic XLR input, Z1 is 20kOhm in series resistor, Z2 is calculated (in parallel) resistor, Vout is 0.775V, V1 is rms ampl voltage (2.82V for 1W @ 8 ohm load, 8.02V for 8W, 11.34V for 16W, 16.04 for 32W)
I recently got Aiyima D03 and found it has bass drop.
I have BEHRINGER UMC22 soundcard and made some voltage reducer scheme for it (according to 3kOhm XLR input of soundcard): 20kOhm resistor in series and 2.7kOhm resistor in parallel (scheme was calculated for 11.34 volt and 16W output).
When I turn on Aiyima at 0 volume all is ok, but when I increase volume by 1 step, Clip lamp in UMC22 starts to flash. I suppose voltage still too high for it and I made a mistake in resistor calculation
Could you please help me:
1) Can I measure freq response of Aiyima, using USB audio as input? I use CoolEdit / Adobe Audition to watch my results.
2) What was my mistake in scheme? Reducer should compress signal to 0.75V, here is formula:
where ZL is 3kOhm impedance of mic XLR input, Z1 is 20kOhm in series resistor, Z2 is calculated (in parallel) resistor, Vout is 0.775V, V1 is rms ampl voltage (2.82V for 1W @ 8 ohm load, 8.02V for 8W, 11.34V for 16W, 16.04 for 32W)