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Fatman Apollo77 is an in-ear hybrid headphone developed in the UK in collaboration with ACS, featuring professional-grade performance.
The Apollo77 includes a dynamic bass driver, two Knowles balanced armature drivers for mid/high frequencies, and a Knowles super tweeter, controlled by a 3-way crossover.
Specifications include a frequency range of 10Hz to 24kHz, impedance of 28Ω at 1kHz, and sensitivity of 108dB, ensuring compatibility with diverse sources.