Sennheiser IE 40 PRO In-Ear Monitoring Headphones (Black) Brand_Newertech 15 built-in lighting effects

15 built-in lighting effects

DUAL-OPTIC DESIGN

Smooth and Rapid Autofocus

and four groups of lights across each channel

but many FX6 specs tick the same boxes and several improve upon the FX9:

Sennheiser IE 40 PRO In-Ear Monitoring Headphones (Black) Brand_Newertech 15 built-in lighting effectsKey Features 10mm Dynamic Drivers 20 Hz to 18 kHz Frequency Response 115 dB Maximum SPL Up to 26 dB of Passive Noise Attenuation The black Sennheiser IE 40 PRO are in ear monitoring headphones offering high output and broadband frequency reproduction for musicians, vocalists, and audio engineers in clubs, concert venues, and houses of worship. They feature 10mm dynamic drivers, which produce a 20 Hz to 18 kHz frequency response and a maximum SPL of