Pro sound pro isolation. The Direct Sound EX25 Plus Isolation Headphones are sleek lightweight headphones featuring custom HPA (High Precision Audio) drivers delivering studio-grade audio fidelity. The EX25 Plus Headphones are perfect for musicians and audiophiles thanks to the 33.4dB of passive attenuation and wide frequency response. The High Precision Audio drivers provide a frequency range spanning 20Hz-20Khz capturing every nuance of your audio with optimal accuracy. It comes complete with an aircraft-grade aluminium cable providing optimal signal integrity and superior stability.