[ Active and passive sub woofers; ] active and passive audio speaker enclosures; sound amplifiers; electronic sound mixing, processing and synthesizing apparatus; electronic products for the manipulation of the frequency, time and amplitude characteristics of audio signals, namely, audio processors; pre-amplifiers; audio receivers; electronic effect pedals for use with sound amplifiers; electric wires and cables for the above cited goods; software to control and improve audio equipment sound quality; [ headphones; microphones ]

'activ':1,6 'amplifi':13,41,51 'amplitud':31 'apparatus':20 'audio':9,34,37,42,66 'cabl':55 'characterist':32 'cite':59 'control':63 'effect':45 'electr':52 'electron':14,21,44 'enclosur':11 'equip':67 'frequenc':28 'good':60 'headphon':70 'improv':65 'manipul':25 'microphon':71 'mix':16 'name':36 'passiv':3,8 'pedal':46 'pre':40 'pre-amplifi':39 'process':17 'processor':38 'product':22 'qualiti':69 'receiv':43 'signal':35 'softwar':61 'sound':12,15,50,68 'speaker':10 'sub':4 'synthes':19 'time':29 'use':48 'wire':53 'woofer':5

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