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solved my issue .. thxs guys for your help .. NOT LMAO talking to myself on this crappy :duh:forum Back to a good forum " Computer Audiophile "
With stock 6H6 tube, RCA output of MP-D2 is about 2.3V RMS(L mode) and 4.6V RMS(H mode) at regular 47K-100k load. Unless Emotive Sira preamp has <10K non standard input impedance, the volume of MP-D2 should not be lower than TEAC (opamp ouput). Regarding DSD, MP-D2 AK4490 runs at native DSD mode (bypassing PCM conversion and volume control), so it is usually about 6db lower than PCM. This is DSD recording standard to allow more headroom for high dynamic range recording. If Emotive Sira preamp uses a non standard <10K volume control pot, then it is not quite compatible unless you change it to a standard 50K or 100K volume control. Most of the preamp and integrated amps should have a 47K to 250K input impedance. Second thing is, according to TEAC UD-301 specs, its output is +14dbu which is 3.88VRMS which is way over CD line level 2VRMS standard.BTW, new MP-D2 MK2 with ES9038pro and AK4497 have same PCM and DSD output line level, so they could work better for systems do not have enough gain, or don't want to adjust volume a bit higher when playing DSD.Thanks,Garry