>>287914171
Most use IEMs since it's awkward using over ears with the halo band, although one anon has had luck using his ATH M40/50s. I bent the clip on some Koss KSC75s to fit around the band, which holds them in a similar place to the CV1 headphones. There's 3d printable mods, primarily for the Koss Porta Pro, along the same lines too.