Sennheiser HDB 630 Wireless Audiophile Headphones (Open Box) 6.35mm female 4mm） Output power2 L+R≥2000mW+2000mW（32Ω /THD+N＜1%)

4mm） Output power2 L+R≥2000mW+2000mW（32Ω /THD+N＜1%) Output impedance ＜1Ω（32Ω） Crosstalk ≥124dB(1 kHz/32Ω) Output power3 L+R≥560mW+560mW（300Ω / THD+N＜1%) Noise floor ＜5

Mid Driver: Softears D-MID-A

DVS control

8mm [W] x 68

such as headphones from FiiO

Sennheiser HDB 630 Wireless Audiophile Headphones (Open Box) 6.35mm female 4mm） Output power2 L+R≥2000mW+2000mW（32Ω /THD+N＜1%)HDB 630 Audiophile sound, cut loose HDB 630 with BTD 700 Bluetooth USB C Dongle included You want it all. High resolution, neutral tone, extra long battery life, flawless active noise cancellation, and of course, no more cables. Meet the closed back HDB 630. With the included BTD 700 Bluetooth USB C Dongle, you're free to enjoy glorious audiophile sound anywhere you go. Enjoy perfectly balanced audiophile sound everywhere you go Get high resolution