The AR-133 is packed with features that make it suitable for all kinds of applications. For example, a switch allowing you to obtain a 20dB or 40dB signal. This is done without signal loss, and makes mixing much easier if you’re using a high-ohmic instrument, for example. You can also use the DI box as an intermediate step, as there is an output link to the mixer. This allows you to send a guitar signal first through the AR-133, then to the guitar amp via the output link.