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Phono Preamp with RIAA EQ and RCA connectors. By DeeJayPRE you can eg connect a turntable to a conventional line input of a mixer a sound card or a tape deck. Equipped with an RIAA equalization. Phonograph records have three basic problems: 1 It is physically impossible to press them with ridges that end up Allowing low frequencies to come out at the same reproduction level as mid and high frequencies. Bass compensation is therefore needed during playback 2. Records produce a certain amount of hiss which is covered up in post-production by boosting the gain of the high frequencies before pressing. Counter-EQing during playback compensates for this 3. Magnetic cartridges produce a weak signal which must be boosted to match the rest of the amplification and this too is done during playback. In the mid-1950s the RIAA Recording Industry Association of America established compensation standards. The resulting RIAA preamp has been built into every hi-fi and stereo amplifier with phono or turntable inputs since then. A separate RIAA preamp is necessary when you are connecting a turntable to a mixer that does not have one built in. The DeeJayPRE features an RIAA-type phono preamp circuit housed in a rugged metal case with full patching facilities for connecting it to a phono turntable and mixer.