Ciao Stefano
Caro Stefano,
such a long time that i have to give you some 12 euros!
In any case the lackness of bass I feel is perceived in comparison with my revox no-oversampling and with the best sounding cd player i've had in my system, that's a naim cdx (it's a machine costing big big money!) I had the occasion to test and that is one the best i've heard to date.
Furthermore i've tested the d1 output both on the old elektor pcm63 dac that is suffering for the low quality of the yamaha digital front end and on another old marantz cd 50 always with no oversampling mod.
Still have to try the thing on the Revox, that is my personal benchmark.
Stefano fatti vivo . Ho provato a chiamarti una decina di giorni fa, ma evidentemente eri al lavoro.
Ciao
Paolo
Caro Stefano,
such a long time that i have to give you some 12 euros!
In any case the lackness of bass I feel is perceived in comparison with my revox no-oversampling and with the best sounding cd player i've had in my system, that's a naim cdx (it's a machine costing big big money!) I had the occasion to test and that is one the best i've heard to date.
Furthermore i've tested the d1 output both on the old elektor pcm63 dac that is suffering for the low quality of the yamaha digital front end and on another old marantz cd 50 always with no oversampling mod.
Still have to try the thing on the Revox, that is my personal benchmark.
Stefano fatti vivo . Ho provato a chiamarti una decina di giorni fa, ma evidentemente eri al lavoro.
Ciao
Paolo
Ciao Stefano,
do the 2sk170 significatively improve things, since you have to use 2 of them paralleled?
Cheers
Andrea
do the 2sk170 significatively improve things, since you have to use 2 of them paralleled?
Cheers
Andrea
I also use a 500ohm resistor between the dac points ( balanced version ) , but I am not
quite sure about its effects to the sound .
😎
quite sure about its effects to the sound .
😎
Jfets as I/V converters...
Isn't the input impedance too high? My tests using Jfets in this applications showed a much higher input impedance that with BJTs or Mosfets
Isn't the input impedance too high? My tests using Jfets in this applications showed a much higher input impedance that with BJTs or Mosfets
stefanobilliani said:
I was meaning "does the use of Jfets bring particular advantages over the original Mosfets?"
Cheers
Andrea
stefanobilliani said:
Very nice Stefano,
has you tried this circuit already?
I would omit R1-R4 and going to 2SK389 for better symmetry.
Regards
Adam
acaudio said:
Of course both .
I have forgotten to mention that IMHO the circuit plays better
with a load between the outputs, say 10k ohm .
holy cow
just installed the D1 in my Philips dvd963sa.
I am listening now to thundering bass
and a beautiful soundstage
Well 5 minutes is too early too judge
but I am very glad that promitheus 
sold me those pcb's.
just installed the D1 in my Philips dvd963sa.
I am listening now to thundering bass
and a beautiful soundstage Well 5 minutes is too early too judge
but I am very glad that promitheus sold me those pcb's.
big caps
I used four big silver mundorf caps (2,2 uF) parallel with four 2,7 uF Hovland musicaps in the output.
These big caps are spread all over the cdp because there is of course no room. I didnot expect much from it with the 16 long leads all over the player. The layout is a mesh but the sound is good and I hope will become better if everything has "burned in".
I used four big silver mundorf caps (2,2 uF) parallel with four 2,7 uF Hovland musicaps in the output.
These big caps are spread all over the cdp because there is of course no room. I didnot expect much from it with the 16 long leads all over the player. The layout is a mesh but the sound is good and I hope will become better if everything has "burned in".
My DAC consists of 2 x TDA1541 in parallel. With the Idac of two TDA1541, is the D1 a suitable candidate for IV stage? Any adjustments to make?
commstech said:
IMHO the D1 doesn't care that much about the DAC's current.
Provided you trim it for the correct voltage on the iout pin of the DAC (0V for the TDA1541A) and use a adequate value for the drain resistor of the "sensing" Mosfet (where the I/V conversion is actually made) you should have no problems at all.
Cheers
Andrea
Andypairo said:
Dear Andrea, would u be kind enough to point out to me this drain resistor that i have to take note of? R6 (1.5k) in the schematic?
commstech said:
I can confirm to you that the D1 works perfectly with the 1541A .
Just trim the mosfet source point to O volt before connecting the dac and than do the final adjustments .
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