When sourcing high-fidelity audio equipment, you must prioritize Sound Pressure Level (SPL) and Frequency Response to ensure audio clarity. For portable models, verify Battery Life (typically 12-25 hours) and IPX67 ratings for water and dust resistance. For home theater or professional setups, ensure support for Dolby Atmos, DTS:X, and Hi-Res Audio certification. Additionally, check for LDAC technology support, which allows for high-quality wireless audio streaming at three times the data rate of standard Bluetooth.