AV-LEADER BA11 is a balanced armature in-ear headphone featuring dual micro balanced armature drivers for high-fidelity audio reproduction across a 20 Hz~20 kHz frequency range. The design incorporates an acoustic seal that provides exceptional sound isolation from external noise. With a sensitivity of 95dB SPL at 1 kHz and nominal impedance of 39Ω at 1 kHz, the BA11 delivers precise audio reproduction. A specialized air booster system enhances low frequencies for deeper bass response while maintaining overall sound quality. The ergonomic design features soft silicone sleeves for comfortable extended wear, making these in-ear monitors suitable for professional audio monitoring and critical listening applications.