So yesterday evening I finaly had time to change the OP-Amps. I replaced them by a pair of OPA 2134 and added the Caps.
Not THAT of a difference but I think that now everything sounds a bit smoother and most important the different instruments now sound more seperate 🙂
Because there are too many parts that are too hard to obtain here, I laid down my plans of the kwak clock and built a PSU for a Tentlab X0 which I still have to purchase - I´m not quiet sure if there would a difference that is worth 30 euros...
Greetings,
Maxx
Not THAT of a difference but I think that now everything sounds a bit smoother and most important the different instruments now sound more seperate 🙂
Because there are too many parts that are too hard to obtain here, I laid down my plans of the kwak clock and built a PSU for a Tentlab X0 which I still have to purchase - I´m not quiet sure if there would a difference that is worth 30 euros...
Greetings,
Maxx
I agree, OPA1612 sounds better to me than OPA2134. But LM4562 is what I decided to have in my DAC's.
I apologize for the resurrection of the this thread.
I have also a DCD-510ae and I eliminated the mute circuit and couple direct from the Elna cap with a resistor of only 47 Ohms (very low out Z), but I dont make a sort yet in the blocking caps. At this moment i dont have problems with that. I try this low Z for years in my old Pionner CD player. Any problem but the voltage of OP are others. Now I´m not sure.
Whith the 47 Ohm resistors, the current will can be near 200 mA ( OP + - 12V).Too much for a any OP. An the oder hand, whith the original out Z of 440 Ohm (220x2) this current is near as the sure 40 mA.
In think to return again to the old Z (220x2 ohms or 300 Ohm) and short then the Elna out caps.
I have in mind also the change of de OP for a OPA1612. Before I try to sort the caps. No problems if them burn.
Cheers
I have also a DCD-510ae and I eliminated the mute circuit and couple direct from the Elna cap with a resistor of only 47 Ohms (very low out Z), but I dont make a sort yet in the blocking caps. At this moment i dont have problems with that. I try this low Z for years in my old Pionner CD player. Any problem but the voltage of OP are others. Now I´m not sure.
Whith the 47 Ohm resistors, the current will can be near 200 mA ( OP + - 12V).Too much for a any OP. An the oder hand, whith the original out Z of 440 Ohm (220x2) this current is near as the sure 40 mA.
In think to return again to the old Z (220x2 ohms or 300 Ohm) and short then the Elna out caps.
I have in mind also the change of de OP for a OPA1612. Before I try to sort the caps. No problems if them burn.
Cheers
I return to the mute circuit.It sounds the same, but te overall sound is in any case "roll-off" at the highs.
I think the problem for this kind of tone is at the end analog secction.There are a usually input low-pass filter for limit the high "digital" frecuencies.The second OP is a Sallen-key filter.This part...hummmm...
Has any this secction modificated for a best final tone?
Thank´s
Xto
I think the problem for this kind of tone is at the end analog secction.There are a usually input low-pass filter for limit the high "digital" frecuencies.The second OP is a Sallen-key filter.This part...hummmm...
Has any this secction modificated for a best final tone?
Thank´s
Xto
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