Symphonium Audio Helios In-Ear Headphones Cable Termination:4.4mm AMTS works by absorbing the

AMTS works by absorbing the high-frequency standing waves that form between the transducer and the listener’s ear in the space created by an ear pad

m15 (-15dB) and m20 (-20dB)

and allows you to adjust your speaking volume to a proper level (not too loud

Gain: L/M/H

Whether it is the deepest bass sound of the organ in European cathedrals or the strongest bass and guitar melodies in hard rock

Symphonium Audio Helios In-Ear Headphones Cable Termination:4.4mm AMTS works by absorbing theSymphonium Helios Review: Uncompromised Engineering Written review by FC Construct Check out Precogvision's video review of the Symphonium Audio Helios In Ear Monitor Headphones below. Introducing the Symphonium Audio Helios, a Headphones. com North American exclusive in ear monitor headphone priced at $1099. The Helios is a true competitor in sound quality alone in the $1k price bracket and delivers bass unlike any other balanced armature IEM before