Apparatus and instruments for recording, amplifying and reproducing sounds; sound processors, amplifiers, pre-amplifiers, power-amplifiers; buffers, distributors, signal generators and convertors, all for use with audio signals, video signals or combinations of audio and video signals; video, audio or video and audio signal testing, monitoring, recording and reproducing or processing apparatus

'amplifi':6,12,15,18 'apparatus':1,54 'audio':29,36,41,45 'buffer':19 'combin':34 'convertor':24 'distributor':20 'generat':22 'instrument':3 'monitor':48 'power':17 'power-amplifi':16 'pre':14 'pre-amplifi':13 'process':53 'processor':11 'record':5,49 'reproduc':8,51 'signal':21,30,32,39,46 'sound':9,10 'test':47 'use':27 'video':31,38,40,43

HOELLSTERN

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