Today i received my Creative BT-W4 Bluetooth Dongle. I tried to use this to look if i could further better the (already very good) Sound with PX8 on my iPhone 14Pro Max (via Bluetooth aac-codec).
The BT-W4 uses native aptX adaptive codec with PX8. For iPhone, you have to use a Dongle with Lightning Power-Delivery and USB to connect the BT-W4. This works, but Sound isn’t any better, it is even a bit worse. From my subjective test i got the impression that i got a bit less dynamic with the BT-W4 in adaptive Mode. Even the max. Volume on the PX8 gets lowered this way. Worst of all: Seldom, but here and there i get little sparkles in the sound. So my whole impression of several tests with using native aptX adaptive with Mac/iOs, either, via the creative BT-W4 (around 50€) or another noname USB-BT soundcard from amazon for 30€ is just this: Forget about it! It’s like swimming against the tide with hurdles and sparkles and other unconveniences. Just not worth it IMHO. I send both back.
If you want better the already very good sound with iOS/Mac just use a direct USB-cable connection, don’t play the codec-game, it’s not worth it on APPLE Devices.
Just my 2c.