Dayton Audio DAX88KP In-Wall Control Keypad for DAX88 Headphones Bass: 7" (180mm) coated fiberglass

Bass: 7" (180mm) coated fiberglass matrix cone

the TT-15S1 is as impeccable as they come

MDF (medium density fiberboard)

often used aerospace and the automotive industries

Dayton Audio DAX88KP In-Wall Control Keypad for DAX88 Headphones Bass: 7" (180mm) coated fiberglassThe DAX88KP Keypad gives you control over a zone's function, including volume, power, source selection, mute, treble, and bass for a Dayton Audio DAX88 multizone amplifier. Dayton Audio's DAX88 8 Source, 8 Zone Distributed Audio Matrix Amplifier delivers the new standard of the multi zone Wi Fi audio experience. Providing six stereo amplified zones and two stereo line level preamp zones, the DAX88 offers the ultimate flexibility in distributed audio