TDA 1540 NOS – Non Over Sampling
Some qoutes from internet
“Absolutely no doubt that this mod has a fantastic effect on the sound, there’s no going back to OS for me!”
“The sound is unique, sweet, clear and full of detail that the newest cutting edge delta sigma DAC can never produce. If you haven’t taste this kind of sound before it’s definitely a regret for an audiophile. It’s like compare Vinyl and CD, Rollling shutter and global shutter in the DSLR.” ?
A Modification board ” NOS plus reclocking.?! ”
Timing to TDA1540 After modification , dumping 2 LSB bits
Now the measurements
Philips CD 204 Orginal
With NOS modification
Mutltitone -20 dBfs 20-96000 Over Sampling
Mutltitone -20 dBfs 20-96000 Non Over Sampling
Multitone -20 dBFs 20-96000 Hz compare Over Sampling vs Non Over Sampling Log
Multitone -20 dBFs 20-96000 Hz compare Over Sampling vs Non Over Sampling Lin
Freq. Sweep Non Over Sampling 0dB fs
Freq. Sweep Non Over Sampling -1dB fs close-up
1 kHz -20 dBfs compare Over Sampling vs Non Over Sampling
1 kHz -60 dBfs compare Over Sampling vs Non Over Sampling
THD gemeten is\n CD 104 met N.O.S. Modificatie + reclocker. oordeel zelf.
SAA7030 NOS board..