Figured I'd share my dx240 mod here.
So far find amp5mod the best stock amp ibasso have made and it pairs fantastic with dx240.
That being said, in a stock form it has quite a few issues, main being sharp bass and metallic/ distorted/grainy top end. Vocals are pretty good, if not a bit veiled. Stage is very good and layering as well, depth is a bit lacking and general resolution is not quite there.
So with all that in mind start d to mod my amp5mod, first just the electrolytic caps. Changed both nichicons for audio note kasei non polar ones of same capacity. The Siemens got changed for audio note standard 470uf25v. Left the film caps stock as I like what they do to sound.
This was pretty good in general improvement in every aspect ex is perhaps bass, was still to sharp and one dimensional. Voices where not quite there yet either and so was treble. But quite a lot nicer and natural sound.
So after a bit of use like this, couple of months.
Decided am not yet satisfied with it's sound performance so ordered some kemet polymer tantalum capacitors, same ones
@Whitigir suggested for use in previous ibasso mods of his.
So got 22uf10v and 100uf10v ones to replace in the amp5mod and if any then in my dx240 as well
Know solder job isn't nearly best I have done but with my caveman tools was best could master.
Ended up changin all but two taltalum caps in my amp5mod for the kemets and 4 tantalum caps inside the main player to 100uf10v kemet ones.
And finally have the sound was hoping for and expecting. Have had this done since Christmas, so barely over 200hour on it.
Absolutely all grain is gone, so is any kind of noise floor, background seems completely black. Bass has absolutely no sharpness to it, sound natural, real and properly rounded and textured.
Mids and vocals have a veil lifted from them with quite more nuances, incredible clarity.
And treble, f**" yeah, sparkle and crystal clarity without any deficiencies. The graininess is completely gone, everything is well rendered placed in proper place, with impeccable imaging. Layering is a lot better as well so is stage in all dimensions especially the depth and height. Sounds move around a lot more now and separation is on another level.
Basically even better results than when going from dx220 to dx220ex.
Though have a bit more caps to change on the other side of Mainboard. And two caps where I don't know their size on my amp5mod. Perhaps someone knows what value are the two black ones on bottom of amp5mod?
main body before
And after
And the amp5mod
In this one on actually put one tantalum cap the wrong way around, was a bit of a surprise turning it on and having one channel a lot weaker than the other, but quick check solved the issue, just resoldered it correct way around and all is good.
Perhaps someone knows what caps are on the other side of player main board? Didn't want to pull it out when had it disassembled last time,didn't want toess with thermal compound on that side.