In this work we present phantom and in-vivo pTx excitation results acquired with a 32-channel add-on pTx system based on a 1-channel 7T MRI system. The add-on system uses custom-built I/Q modulators and custom-built amplifiers located inside the magnet room. The single exciter channel is split into 32 sub-channels, whereby the modulators control the phase and amplitude of the individual pTx RF pulses. The modulators and pre-calculated pTx gradients are synchronized via trigger signals generated in the imaging sequence. With the 32-channel pTx system, reduced FOV imaging of the lumbar vertebrae during free breathing was possible.