Great Just Got Greater!The MKIV is different in four areas:New World Power Supply - It will operate on any power source, 100 - 240 VAC, 50/60 Hz. The new supply is not a wall wart as before, but an in-line supply. This makes it much more convenient for the user. We tweaked the audio response, to be tad flatter, but the +/- 0.25 dB RIAA accuracy remains the same.MKIII Details REK-O-KUT® PROFESSIONAL MOVING MAGNET PREAMP MKIII - INCREDIBLY ACCURATE FREQUENCY RESPONSE, LOW-DISTORTION-LOW NOISE-NEW HIGH OUTPUT Add a turntable to an amplifier that has no phono input or a second turntable to an amplifier with only one phono input. The REK-O-KUT Professional Moving Magnet Preamp can be used to convert any AUX input to phono use. The Professional Moving Magnet Preamp is designed for both home as well as broadcast and studio applications. The REK-O-KUT Professional Moving Magnet Preamp will make it possible to use a line level input on any amplifier or mixing console for playback with a turntable that is equipped with a conventional, moving magnet phono cartridge. Typical input sensitivities of such inputs are roughly 250 mVolts, and the outputs of typical moving magnet cartridges is about 3.5 mVolts. The preamp boosts the level of the magnetic cartridge and also applies "record compensation" in the form of the RIAA curve. This adjusts the relative levels of bass and treble to match that of modern records. Used with the Esoteric Sound Re-Equalizer, it makes a fully adjustable playback system for vintage and mono records.
Features:Highly accurate RIAA record compensation. Includes 39 inch 43 pF/ft interconnect cable. Input matched to most high-quality pickups. 6 Hz subsonic filter to cut ultra low rumble. Includes cable for computer soundcard. High-quality, gold-plated RCA jacks. Includes soundcard adapter cable. Discrete component design. Power: 120 VAC/60 Hz. Low hum steel case.
Technical:Sensitivity: 3.5 mV Rated Output: 300 mV RIAA Deviation: +/- 0.25 dB Sub-Sonic Filter: 6 Hz THD: 0.025% Signal/Noise: Better than 80 dBA Input Impedance: 47 kOhms, and 220 pF Output Impedance: 600 Ohms Overload: 50 mV Maximum Output: 4.0 Volts Crosstalk: 45 dB at any frequency between 20 - 20 kHz Dimensions: 5- 5/8" X 1-1/2" X 3-1/4" Shipping weight: 2 Lbs