inconsistent impulse response 2 different computers
1.....behringer uphoria um2 new laptop USB as input headphone 3.5mm as output
2.....phonic mu-802 mixer older laptop headphone output /mic input 3.5mm rca
bought brand new behringer u-phoria um2 external usb interface, but when measuring it was showing a rising high frequency response 15khz and above using jbl control 1 speakers, questioning the rising response, I switched to infinity modulus 1 and the top end dropped.
So using the um2 on new laptop
phonic mu-802 on old laptop
both connected to the same amplifier
both laptops have different versions of REW
here is a photograph of impulse response of both
phase response of both
new laptop to the left of pics.
if anyone asks for files to look at please tell me how and I will upload cheers
1.....behringer uphoria um2 new laptop USB as input headphone 3.5mm as output
2.....phonic mu-802 mixer older laptop headphone output /mic input 3.5mm rca
bought brand new behringer u-phoria um2 external usb interface, but when measuring it was showing a rising high frequency response 15khz and above using jbl control 1 speakers, questioning the rising response, I switched to infinity modulus 1 and the top end dropped.
So using the um2 on new laptop
phonic mu-802 on old laptop
both connected to the same amplifier
both laptops have different versions of REW
here is a photograph of impulse response of both
phase response of both
new laptop to the left of pics.
if anyone asks for files to look at please tell me how and I will upload cheers
Last edited:
I would recommend NEVER using a headphone output for any measurements. This could easily be the source of the discrepancy/difference that you are observing.
To send the output from the computer to amp(s), use a proper DAC instead of a headphone jack. A $50 USB DAC will be way better than any headphone output.
To send the output from the computer to amp(s), use a proper DAC instead of a headphone jack. A $50 USB DAC will be way better than any headphone output.
yes, use line out connected to a power amp
before any testing of speakers, ensure your setup is good and consistant using hardwired loopback
frequency response should be very flat < +/- 0.1dB as should be the phase. (non smoothed)
with repeated tests, impulse should be at the same time and not move about.
before any testing of speakers, ensure your setup is good and consistant using hardwired loopback
frequency response should be very flat < +/- 0.1dB as should be the phase. (non smoothed)
with repeated tests, impulse should be at the same time and not move about.
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