The device uses stock impulses (or third-party impulses in WAV format) and automatically generates all the needed folders on the microSD card upon first use. To replace an impulse, simply delete the old one and place the new one in the same folder. For example, to replace impulse #4, open SD:\AFX\ and replace AFX4.WAV with an impulse of your choice (24bit 48kHZ WAVE PCM1, uncompressed). Now, if you insert the microSD card into the CabZone LE and turn the CABINET knob to position 4, the uploaded impulse will be selected. If the card is ejected, the device reverts to using stock impulses. This way, you can expand the set of impulses to 20 or create a mix of stock and third-party impulses of your choice.
In this mode, the CabZone LE will apply the built-in neutral power amp simulation to any impulses you upload.