Here is what Theta has to say about the Pro Basic II on the Theta Legacy page: And yes, it was one notch below the beloved PCM69, which also was in the Theta DS Pro II. Here is a link to the datasheet if you want more info. It is a 10-bit mutibit and then for the lower part it is 1-bit for the rest of the bits. The PCM67 is also a hybrid chip, meaning it is both multibit and 1-bit. It means doing balanced and unbalanced the hard way, but the right way. Now the PCM67 is a 2-channel output chip, so one chip is used for each L and R channel in a balanced +/- configuration. This particular DAC has two PCM67 chips (K grade I might add) with balanced and unbalanced out. This DAC was the 2nd tier down from the top of the line DS Pro. THETA DS PRO PROGENY: 1 x PCM67P-K + Motorola DSP56001 THETA DS PRO PRIME II: 2 x PCM67P-K + Motorola DSP56001 THETA DS PRO PRIME: SAA7350GP + Motorola DSP56001 THETA DS PRO GENERATION V: 2 or 4 x PCM63P-K + 3 x Motorola 56001 THETA DS PRO GENERATION III: 2 or 4 x PCM63P-K + 3 x Motorola 56001 THETA DS PRO GENERATION II: 2 x AD1860N-K + 2 x Motorola XSP56001 THETA DS PRO BASIC III: 4 x PCM1702-K + 2 x Motorola DSP56001 THETA DS PRO BASIC II: 2 x PCM67P-K + 2 x Motorola XSP56001 THETA DS PRO BASIC: 2 x AD1860 / PCM61P-K – Motorola 56001 THETA DS PRO: 2 x PCM56P-K + 2 x Ti DSP – YM3623B Here is a list of DAC chips in the Theta units: It seems there is not a Theta DAC or products thread and many SBAF members I know have them due to the connection with Mike Moffat at Schiit and given that all of us also have love for vintage DACs, I thought it appropriate for Theta to have it’s own thread.
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