TDA1541A NOS versus OS with Philips -110 dB Low Pass Filter

I hear and read that there is some unrest regarding my NOS measurement. 😉 , this time with -110 dB Low Pass Filer

CD player output followed by Philips -110 dB Low Pass Filter 

 

 

CD player with “CD as a DAC input”  16 bit dithered Signal + “NOS Switch” + TDA1541A adapter with PPS decoupling . –>  Philips -110dB Low Pass Filter

Levels TDA1541A NOS is 0dBr , vs SAA7220p_A&B in 100 steps

• Black : TDA1541A NOS
• Red : TDA1541a + SAA7220p/A
• Blue : TDA1541a + SAA7220p/B

THD+N , TDA1541A  NOS vs SAA7220p_A TDA1541A in 200 steps

THD+N , TDA1541A  NOS vs SAA7220p_B TDA1541A

Bonus THD+N , TDA1541A NOS vs SRC4192  TDA1541A

THD+N , TDA1541A  nos vs SAA7220p_A&B vsSRC4192  TDA1541A

• Black : TDA1541A NOS
• Red : TDA1541a + SAA7220p/A
• Blue : TDA1541a + SAA7220p/B
• Green : TDA1541a + SRC4192

A bump in THD+N in Non Over Sampling at high frequency ?!

19 kHz + 20 kHz at 48 kHz Sampling  via SAA7220p_B

19 + 20 kHz at 48 kHz Sampling  NOS

 

19 + 20 kHz at 48 khz Sampling  via SAA7220p_B vs NOS

• Red : Non Over Sampling 
• Black : OS SAA7220p_B

 

FFT : 256k 50x AVG – TDA1541a NOS

FFT : 256k 50x AVG – TDA1541a + SAA7220p_A

FFT : 256k 50x AVG – TDA1541a + SAA7220p_B

Bonus : FFT : 256k 50x AVG – TDA1541a + SRC4192

 

FFT : 256k 50x AVG – NOS vs TDA1541a + SAA7220p/A&B vs TDA1541a + SRC4192

• Black : TDA1541A NOS
• Red : TDA1541a + SAA7220p/A
• Blue : TDA1541a + SAA7220p/B
• Green : TDA1541a + SRC4192

Linear Scale – FFT : 256k 50x AVG – NOS vs TDA1541a + SAA7220p_A

Linear Scale – FFT : 256k 50x AVG – NOS vs TDA1541a + SAA7220p_B

Linear Scale – FFT : 256k 50x AVG – NOS vs TDA1541a + SRC4192

Linear Scale – FFT : 256k 50x AVG – NOS vsTDA1541a + SAA7220p_A&B vs TDA1541a + SRC4192

Phase respond -110 dB low pass filter