I was hoping to do some measurements on my phono preamplifier to check some parameters (response, thd+n) and looking for a practical way to set this up.
My plan so far:
1. Use REW with an RME interface. Output 1 goes to input 1 on the preamp, output 2 used as loopback reference
2. Set tone generator at 50Hz, calibrate output voltage using multimeter
3. Dial down output to 3mV (1 kHz) to match mm cartridge level
4. Run sweep
5. Apply inverse RIAA on measurement (found a file to apply to 'measurement microphone')
However, i'm running into the problem that when i get to step 4, i check the levels: all good, but when i start the measurement it stops because of clipping.
Anybody have any idea what i'm missing here? Thanks in advance!
My plan so far:
1. Use REW with an RME interface. Output 1 goes to input 1 on the preamp, output 2 used as loopback reference
2. Set tone generator at 50Hz, calibrate output voltage using multimeter
3. Dial down output to 3mV (1 kHz) to match mm cartridge level
4. Run sweep
5. Apply inverse RIAA on measurement (found a file to apply to 'measurement microphone')
However, i'm running into the problem that when i get to step 4, i check the levels: all good, but when i start the measurement it stops because of clipping.
Anybody have any idea what i'm missing here? Thanks in advance!