Cid
100+ Head-Fier
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- Aug 8, 2004
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Can someone post RMAA results of this?
OKAY. So after reading about audiofil's experience with switching opamps with the MX1, I wanted to try it for myself. I did some research and decided to go with the AD797. I looked at the datasheets on AD's website and noticed that there was an 8-pin PDIP package of it, which was great because that is the form factor of the stock opamp and I wanted to avoid using an adapter if possible. I know audiofil used got two of the AD797BRZs and used an adapter. I sprung for the AD797ANZ (the PDIP AD797).
Today I got it in the mail and installed it easy as pie, and yes, it is definitely installed in the right direction, the notches are in the same place. Unfortunately, there seems to be something very wrong. The volume is now very low and muffled and there is a lot of distortion in the (very quiet) sound. In short, music comes out, but clearly there is a problem.
Please help! Is there really something so different between the AD797BRZ and the AD797ANZ or did I just install it wrong? Thanks so much in advance!
I can't believe 8 pages, and comparing all these dacs, doesn't result in any RMAA posts.
OKAY. So after reading about audiofil's experience with switching opamps with the MX1, I wanted to try it for myself. I did some research and decided to go with the AD797. I looked at the datasheets on AD's website and noticed that there was an 8-pin PDIP package of it, which was great because that is the form factor of the stock opamp and I wanted to avoid using an adapter if possible. I know audiofil used got two of the AD797BRZs and used an adapter. I sprung for the AD797ANZ (the PDIP AD797).
Today I got it in the mail and installed it easy as pie, and yes, it is definitely installed in the right direction, the notches are in the same place. Unfortunately, there seems to be something very wrong. The volume is now very low and muffled and there is a lot of distortion in the (very quiet) sound. In short, music comes out, but clearly there is a problem.
Please help! Is there really something so different between the AD797BRZ and the AD797ANZ or did I just install it wrong? Thanks so much in advance!
Well ... RMAA tests are pretty much pointless if you want to asses the sound quality of a DAC/amp.
THD, DR, FR, Noise floor, Crosstalk cannot really tell you what you actually need to know.
Trying to quantify these into sound signature attributes is an exercise for the imagination, rather than a scientific approach.
I remember measuring once the RMAA "performance" of my cellphone ( Sony Ericsson W series) against my soundcard and my NOS DAC (Monica3). Although it didn't fare that well against the soundcard the phone did actually show better THD, flatter FR and lower noise floor and crosstalk than my NOS DAC.
Having said that, I bet that no audiophile in his right mind would prefer the cellphone to the Monica3 when listening to music.
Vinyl is another strong counter example for this RMAA thing.
I thought a lot of high end DACS that were PCM1704UK based measure terribly
Anyways, if I actually knew how to use RMAA I'd post some measurements for people =P