The five things most often missing
A power supply, on keyboards and on every effects pedal. A sustain pedal, on almost every digital piano and keyboard. A cable, on every XLR microphone and most amplifiers. An adapter, between 3.5 mm (0.14 in) and 6.35 mm (0.25 in) headphone sockets. A stand, on everything.
How to read for it
Look for the phrase “in the box” or “included” in the listing, and treat its absence as an answer. Manufacturers who include a pedal say so, because it is a selling point; those who do not, do not mention pedals at all.
The two that cost money to get wrong
A pedal of the wrong polarity makes an instrument behave as though it is broken. A power supply of the wrong polarity can destroy a pedal in seconds. Both are cheap to get right and expensive to guess.
Budget for it
As a rule, add a real sum to any instrument purchase for the parts that are not in the box. On a starter pack, add nothing — that is what a pack is for.
The questions players ask
Why do keyboards ship without a power supply?
Because many of them also run on batteries, which lets the maker list a lower price. The required voltage and polarity are in the manual — take them from there, not from a lookalike adapter listing.
Does an XLR microphone come with a cable?
Usually not, and it also needs an interface with phantom power. That is three purchases: microphone, cable, interface.
Last reviewed 2026-08-18
