<style> .wpb_animate_when_almost_visible { opacity: 1; }</style> PA550 | Pre Amplifier with RIAA Phono Preamp and Headphone Amp | Rolls Corporation | ATR/Treehouse

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Pre Amplifier with RIAA Phono Preamp and Headphone Amp

Model: PA550

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RIAA equalization is a form of pre-emphasis on recording and de-emphasis on playback. A recording is made with the low frequencies reduced and the high frequencies boosted, and on playback the opposite occurs. The net result is a flat frequency response, but with attenuation of high frequency noise such as hiss and clicks that arise from the recording medium. Reducing the low frequencies also limits the excursions the cutter needs to make when cutting a groove. Groove width is thus reduced, allowing more grooves to fit into a given surface area, permitting longer recording times. This also reduces physical stresses on the stylus which might otherwise cause distortion or groove damage during playback.

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