HISTORY:
My previous business for 25+ years was audio post production but as a side-line we had a quantity of equipment designated as “loaners” for up and coming bands/artists who had either struck misfortune (like some “low life” stealing their gear at a gig) or their existing equipment had simply failed on them, usually at the worst possible moment!
These spare parts come from our Behringer MX 2004A multi-track audio mixer, the equipment has been rechecked immediately prior to dismantling and everything is working great BUT it had some cosmetic issues so I have decided to part out the equipment instead of offering as a complete unit.
Love them or hate them (and some do!), here is some Behringer MX 2004A spare parts … KNOBS & BUTTONS – top section of the panel only (Input Gain & Lo-Cut switch)

Behringer Audio Mixer (SPARE PART)
Model: MX 2004A
Complete set of knobs/buttons located above the main area of the mixer and below the Jack/XLR input sockets
These are used for the Gain & Lo-Cut switching

Knobs supplied:
8x Black
The knobs are designed to push-fit a standard 1/4″ shaft with a flat area on one side
Buttons are also supplied:
7xsmall (black) – ONE IS MISSING! (These are actually the same buttons as fitted in other parts of the mixer)
These buttons sit on top of a shaft extender, there are 8 of these – it is just the knob on top that is missing for one channel
The buttons are push-fit onto a square shaft approximately 3mm x 3mm

These knobs/buttons MAY suit other equipment, fittings are pretty standard

CONDITION (of all knobs/buttons)
No cracks
No damage to the bottom slot or shaft
Clean and unmarked

Since removal, these are now packed in sealed plastic as a set