The headphone volume output of my Alesis Nitro e-drum set was too low, even at max levels, so I purchased this inexpensive headphone amplifier from Amazon https://www.amazon.com/dp/B07QDN6JXG/ref=cm_sw_em_r_mt_dp_EEWTXZVCCY2ZY3JW3BR4?_encoding=UTF8&psc=1

It's has been working fine, but I wanted to find a way to mount it to the drum rack, so I designed a little mount / holder that could work with the Drum Rack Equipment Mount that Orell made here https://www.thingiverse.com/thing:4835740

Current plan is just to affix it with some double-sided tape, but in a future revision I might add the countersunk screw holes and recessed nut holders to match the equipment mount so it's a little more secure