ALM Busy Circuits

Headphone Out


The ‘HPO’ is an affordable super slim and skiff friendly no frills stereo headphone driver output for your modular synthesiser. Includes a volume control and ability to double up a mono signal into stereo. A great use for that left over 2hp in a skiff or larger system.

Give loved ones, friends and acquaintances a break from your musical ‘genius’, the HPO offers a solitary cell for focused creativity impregnable from undeserving non believers.


    • Optional dual channel inputs
    • 3.5mm stereo jack output
    • Volume control
    • Low noise, good sounding
    • Skiff friendly depth


    • Width: 2HP
    • Max Depth: 38mm
    • Power: 5mA @+12V , 5mA @-12V , 0mA @+5V