The creation of smallest possible character projector is the basic concept of the Tiny Projector, where the character can be either linked dynamically with wireless RF connections or be integrated into mobile device.
The circuit has been designed to produce a transceiver that switches the 4-element 1500 Ohm external BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation.
The guitar amplifier project is designed to operate a 4 Ohms load while being rated with 100W as a typical combo type of amplifier that can handle two 8 Ohm speakers in parallel.