Finally i have had the time for do and test the op-amps mod.
I have replaced 3 of 4 ( for me a 5.1 configuration is sufficient ) of the cheap and sonically modest TL072C of the multichannels input ( normally used for listen SACD and DVD-Audio ) and one of two ( always for the 5.1 conf. that i do use ) of the JRC5532s of the output stage, using the well sounding BB/Texas OPA2604 that Rotel use only on the output stage for the frontal L/R, central and LFE channels.
The result are very impressive: now sound very well, more transparent and detailed, the voice and high frequency are more natural, the bass more rich and punched.
Next step: replace the 3 ( or four for 7.1 conf. ) TL072c after the Crystal DAC ....................
Regards
Marco
I have replaced 3 of 4 ( for me a 5.1 configuration is sufficient ) of the cheap and sonically modest TL072C of the multichannels input ( normally used for listen SACD and DVD-Audio ) and one of two ( always for the 5.1 conf. that i do use ) of the JRC5532s of the output stage, using the well sounding BB/Texas OPA2604 that Rotel use only on the output stage for the frontal L/R, central and LFE channels.
The result are very impressive: now sound very well, more transparent and detailed, the voice and high frequency are more natural, the bass more rich and punched.
Next step: replace the 3 ( or four for 7.1 conf. ) TL072c after the Crystal DAC ....................
Regards
Marco
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