The BLU J4 and Bowers & Wilkins PX have 4 common Bluetooth A2DP audio codecs (aptX HD, AAC, aptX, SBC). The BLU J4 supports 5 codecs (aptX HD, LDAC, AAC, aptX, SBC). The Bowers & Wilkins PX supports 4 codecs (aptX HD, AAC, aptX, SBC).
| Codec | BLU J4 Details | Change |
Bowers & Wilkins PX Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | Yes | Yes |
| LDAC | Yes | No |
| AAC | Yes | Yes |
| UHQ | No | No |
| aptX | Yes | Yes |
| SBC | Yes | Yes |
| Bluetooth Version | 4.1 | 4.1 |
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