Each Celestion impulse response captures the essence of one of our guitar (or bass) speakers’ tone. However in order to make effective use of an IR, it must undergo a process called convolution. This is a signal processing operation that has the effect of combining the IR with an input signal, thereby digitally applying the speaker’s tone to that signal.
The convolution process is already built in to the operation of standalone amp modelling hardware, so you don’t even need to be aware of it. If you’re using the Celestion impulse responses with a DAW, then the IR convolution process will be performed by a purpose-designed plugin, which you will need to source, if you don’t already have one (they’re widely available and some are free).
For more information about how to use Celestion IRs with your equipment, see the IR Instructions page.