Driver Size: Measures the speaker diameter (typically 10mm to 13mm); larger drivers generally deliver deeper bass. [1, 2, 3]Frequency Response: The range of sound frequencies a speaker can reproduce (measured in Hz or kHz), where lower Hz offers deeper bass and higher kHz provides clearer treble. [1]Impedance: Electrical resistance measured in Ohms (Ω), which affects power flow and volume efficiency with your audio device. [1]Bluetooth Version: Dictates wireless range (usually 10 meters), connection stability, and energy efficiency (versions like v5.1 or v5.3 are common). [1, 2, 3]Audio Codecs: Compression formats like SBC, AAC, or aptX that manage how audio data transfers from your phone to the earbuds. [1]
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