An invention is afforded for a dampening apparatus for a musical instrument. A first connector component and a second connector component are attached to the carrier plate. The bracket is capable of moving relative to the cartridge body in a direction along which the second bracket wall contacts and separates from the cartridge body. The apparatus and process of the present invention has several advantages for enhanced chamber performance. A radio frequency short circuit bypass is electrically coupled between the second inner conductor and the second outer conductor. The ink-jet ink compositions reduce adhesive swell, scale formation and corrosion, and as such lead to improved interactions with the structural materials of ink-jet printer pens.