Resource
Audio Precision
Audio analyzer and testing company offering APx measurement hardware and software for analog, digital, headphone, microphone, and loudspeaker testing.
Verification sources
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publication
Online magazine covering hi-fi, home theater, headphones and music, with equipment reviews and product news.
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Dayton Audio OmniMic V2
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Calibrated omnidirectional USB microphone and software system for room, loudspeaker, array, and in-place audio measurements.
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Klippel
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German measurement and control company providing systems for loudspeaker, transducer, and audio-system diagnostics, including near-field scanning.
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miniDSP
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Analogue Seduction
dealer
Whittlesey, UK dealer focused on two-channel and home-cinema equipment, including amplifiers, cartridges, DACs, streamers, speakers, turntables, and vinyl.
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Bowers & Wilkins
manufacturer
UK audio brand with loudspeaker, headphone, and home-audio product lines described on its official site.