Is it possible to supply power a guitar speaker cabinet and use without having an amp head?

While it is possible to supply power to a guitar speaker cabinet without an amplifier head, it is not advisable, as it can potentially damage the speaker. Guitar speaker cabinets are passive components that require an amplifier to provide the electrical signal and amplification necessary to produce sound. Without an amplifier, the speaker will not receive the power it needs to function correctly and may overheat or even blow out.

Instead, it is recommended to use a guitar amplifier head or a powered speaker cabinet, which has a built-in amplifier, to power the speaker cabinet and produce sound. This will ensure that the speaker receives the correct signal and power and operates safely and efficiently.