NAD PP-3 Specifications

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NAD PP-3 Specifications Manual pdf 1 page image

LP to HDNAD’s PP-3 combines the award winning PP-2 MM/MC Phono Preamp with a high quality Analogue-to-Digital converter with USB interface. Utilizing VinylStudio™ Lite PC Software (CD included) copy your LPsdirectly to a PC as either .wav or .mp3 files. Once your analogue LPs are digitized, the music can be burnedonto CD-Rs or transferred to portable music players. The PP-3 also includes the same analog outputs as thePP-2 for connection to an analogue stereo system.TECHNICALLY SPEAKINGThe PP-3 phono preamp consists of a low noise discrete MC preamp followed by a low noise opamp-basedRIAA MM stage incorporating a 12dB /octave infrasonic filter to attenuate turntable “rumble” noise. Theoutput feeds the Line Output as well as the soft clipped input of an A/D converter with USB Output. This canbe connected to any PC for recording from vinyl disc to PC hard drive.MC/MM PHONO STAGEThe moving coil preamp is a 4 transistor low distortion amplifier noise-optimised for the very low sourceimpedance of moving coil cartridges. It uses ultra-low intrinsic base resistance transistors and operatestwo of them in parallel push-pull for a further 3dB lowering of input noise. Its input noise is typically 60nV, or78dB below 0.5mV (RIAA and A weighted). It has a gain of 15 times or 24dB bringing the lowest output MCcartridges up to MM level. The input impedance is 100 ohms in parallel with 180pF.The Moving magnet preamp section uses a low noise low distortion opamp with RIAA equalisation andinfrasonic filter in the feedback network. The gain at 1k is 35.2dB, or 287mV out for 5mV in with 23dBoverload margin and the frequency response is accurate within +/- 0.3dB 50Hz-20kHz, +/- 1dB 20-50Hz.The infrasonic filter has -3dB point at 10Hz and is 14dB down at 5Hz. The input noise with IHF cartridgesource is 0.75uV or 76dB S/N re 5mV (RIAA and A weighted as per IHF202.)DIGITAL STAGEThe output of the phono preamp is attenuated, further low pass filtered and fed to the input of the A/Dconverter. A Soft Clipping circuit is employed to prevent overdriving the A/D converter. The MM preamphas a 100dB dynamic range and the A/D converter 89dB allowing NAD to optimise the gain for best signalto noise and lowest distortion. The A/D converter has a sampling frequency of 48kHz for USB compatibilityand a THD of only 0.01% at 100% FS.POWER SUPPLYBy increasing the power supply voltage from 15 volts to 24 volts, we have improved overload margins andenhanced musical dynamics. This supply delivers raw DC to the PP-3. Internal circuitry has a precision lowPP-3 Digital Phono PreamplifierDetails

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