DamienRThere are still chips for sale. I have a feeling the Non MQA version is obsolete as they just released the D70s MQA with double DACs. So now they will be releasing a double DAC D90s
dixterAKM4499 is a Quad Lane chip. Not Dual like AKM4497. Point being Cost Wise no point as it'll be to high, as Seen already with the 2 already out (A22/A22MQA). It's literally a meme to use more than one & the only improvement really heard over Topping D90 was pretty much soundstage increase.