AYA 2 list mods

#41 · 4 February 2024, 11:36 PM

Quote from Eldam on 4 February 2024, 11:36 PM
Hi,

In my system, I did,'t like neither the BG NX and BG N there. Oscon SEP C version has too much low esr, and often gives (to me) odds results, SEP F even worse... (SEP are smoother but there are better polymers, although I do not like too much polymers here.)

Also a sligthy better result than the PPS are with tinniest form factor Cornel Dublier acrylic there in 16V version. I suggest to try to lift the PPS of the -/+ 5V and just try the one at the -15V when you get the FC 1200/50 small length factor, to have an idea as well. You should get something snappier if I remember than when the 3 pins are decoupled.

But largely depends to your whole system, up to you to adapt to your sauce. Well for I the two Silmic II were a limiting factor in my system as any other caps there. whatever film caps or BG N caps. In my system it breaked the openess, clarity, feeling of dynamic. It is also related to the pre I have after which is a smooth sound Yamaha preamp CX2. But after is a very clear Chord amp, so...

you should also try those FM 2200/16 as analog smoothing caps: they are cleaner and punchier, sligthy meatier on the analog rail than the ones of the BOM (but remember I have not the silmic 2 at blocking DC)

If you remove the serie Silmics, do not forget to remove the ended resistor to gnd as well, only do if you are sure your pre or amp can stand DC at input. My pre has input serie cap, so I could without a risk.

I haven't tried the JLSounds yet with the TDA1541A; I use the I2S to PCM boards from Ian canadian guy, but which is said to have some errors and works in 15 bits. but it stays far superior sound wize than the I2S to me. Something is woyrring me a little with the JLSOunds. A cpld is dividing the spped clock by two after the reclocking of the 45/49 crystals.

For now I use a fifo solution with the same Crystek xtail than the AYA5 are using, the simultaneous modeis slaved by the same clock that reclocks the signal after the isolation and a Fifo makes the alignment to start a new clean I2S. I play at the same sample rate that my library, i.e. 44.1 K hz most of time, while the Bck is higher I assume due to the 45/49 Crystek on the masterclock.

That is also maybe the reason I didn't liked the Bclk reclock of pin 16/17 and the Grunding mode via the WOrld clock is not really advised either (should be 176.4 k hz, not 44.1)

Hi,

In my system, I did,'t like neither the BG NX and BG N there. Oscon SEP C version has too much low esr, and often gives (to me) odds results, SEP F even worse... (SEP are smoother but there are better polymers, although I do not like too much polymers here.)

Also a sligthy better result than the PPS are with tinniest form factor Cornel Dublier acrylic there in 16V version. I suggest to try to lift the PPS of the -/+ 5V and just try the one at the -15V when you get the FC 1200/50 small length factor, to have an idea as well. You should get something snappier if I remember than when the 3 pins are decoupled.

But largely depends to your whole system, up to you to adapt to your sauce. Well for I the two Silmic II were a limiting factor in my system as any other caps there. whatever film caps or BG N caps. In my system it breaked the openess, clarity, feeling of dynamic. It is also related to the pre I have after which is a smooth sound Yamaha preamp CX2. But after is a very clear Chord amp, so...

you should also try those FM 2200/16 as analog smoothing caps: they are cleaner and punchier, sligthy meatier on the analog rail than the ones of the BOM (but remember I have not the silmic 2 at blocking DC)

If you remove the serie Silmics, do not forget to remove the ended resistor to gnd as well, only do if you are sure your pre or amp can stand DC at input. My pre has input serie cap, so I could without a risk.

I haven't tried the JLSounds yet with the TDA1541A; I use the I2S to PCM boards from Ian canadian guy, but which is said to have some errors and works in 15 bits. but it stays far superior sound wize than the I2S to me. Something is woyrring me a little with the JLSOunds. A cpld is dividing the spped clock by two after the reclocking of the 45/49 crystals.

For now I use a fifo solution with the same Crystek xtail than the AYA5 are using, the simultaneous modeis slaved by the same clock that reclocks the signal after the isolation and a Fifo makes the alignment to start a new clean I2S. I play at the same sample rate that my library, i.e. 44.1 K hz most of time, while the Bck is higher I assume due to the 45/49 Crystek on the masterclock.

That is also maybe the reason I didn't liked the Bclk reclock of pin 16/17 and the Grunding mode via the WOrld clock is not really advised either (should be 176.4 k hz, not 44.1)

#42 · 6 February 2024, 9:30 AM

Hi,

Thanks for detailed reply

I can remove the PPS for the +/-5v , they'll probably melt but I have a couple of spares . Do you still use the 1500uf FM for the +/-5v supply ?

I remember those acrylic caps , think they are FCA series but ive never tried them so will order to try next time I need parts .

I don't use output coupling caps , wire leads run from the 150R output resistor .

I use 1k5 TX2575 I/V and Allan Bradley for 910R and 150R. I have some 1k5 Allan Bradley incase I change back , ive tried Riken here too but prefer the TX2575 for now .

I need to sort out the USB section, there's still the standard PCM2706 so I'd like to use something better . I've been using a Mini XMOS XU208 spdif output , it also has i2s output but I don't think that will work with TDA1541A . Maybe need modification

#43 · 6 February 2024, 11:35 PM

Hi,

try frst with, then w/o. Yes CD FCA or equivalent Panasonic ECPU. The HCPU have better precision, better for the precision of the DEM capacitors. But I like acrylic in power decoupling, I must be biased though because one should not hear a difference with 0.1 uF decoupling ? Migth be the lower casing size 0805 or the only 20% precision that introduce sligthy difference, or simply autobias of the solderer ? Just guessing !

TX2575, I haven't tried.

Eldam