Hello, I am selling a practically new Zishan DSDS Dual AK4497 modded by Sanmigel , I ordered it from linsoul audio store, and sent it immediately to modding, to the Russian well known engineer Sanmigel. I followed the tread about Zishan a and chose the dual4497 for many reasons specified there.
The mod is unique, it was never made on this model, he agreed to perform it as an experiment, and it was successful. Look at the specs. Sanmigel claims that with this mod he practically has reduced distortion by 250 times compared to original SQ. Hard to believe , but people DID like the sound right out of the box. Now , it’s a lot better . Look at the measurements made by the engineer.

He made composite output using opamp ad45048.
He left rollable lm4562 unchanged because it’s clean and neutral and very low distortion.

Sound is very even and surgically clean, very close. But on the darker side, I believe due to a powerful bass.

Base compared to ibasso dx90 is more powerful and articulated
As I said , It rather has a darker sound in my opinion without impact on any frequency though
the most Recent Firmware 5.0b is installed , the firmware doesn’t change the SQ, some fixes applied.
Battery life is definitely better compared to ibasso dx90, but still far away from long lasting modded iPod 5.5)
I live in Kazakhstan. The shipment and payment method Are negotiable. Shipment will be paid by the buyer. The price is fare: it contains the original price plus shipment to Moscow and back plus the mod itself.