The Harmonix range of harmonicas is a revolutionary concept and combines the traditional method of playing harmonica with futuristic styling and construction. Each instrument is made up of a cartridge (CX1), housing and a dummy module (BX1). The cartridge system allows for easy key changes whilst the module can be swapped to give amplified playing. This can take the form of either cabled (EX1) or wireless (WX1) operation with the microphone capsule and wireless transmitter being integral in the upgrade module