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LP records may be an older technology, but they are far from dead. The NAD PP-3 phono preamplifier can turn any line-level input (AUX, TAPE, etc.) into a very high performance phonograph input. The audiophile-grade designed PP-3 is compatible with both conventional MM phono cartridges and with high-end moving-coil designs. The PP-3 also incorporates a similarly high quality analogue/digital converter, output via a USB port. Connect this to a computer or other digital-recording device, and you can easily archive your precious LP collection to compact disc, MP3 files, or whatever digital format you choose.
NAD’s PP-3 combines the award winning PP-2 MM/MC Phono Preamp with a high quality Analog-to-Digital converter with USB interface. Utilizing VinylStudio Lite PC Software (CD included) copy your LPs directly to a PC as either .wav or .mp3 files. Once your analog LPs are digitised, the music can be burned onto CD-R's or transferred to portable music players. The PP-3 also includes the same analog outputs as the PP-2 for connection to an analog stereo system.
The PP-3 phono preamp consists of a low noise discrete MC preamp followed by a low noise opamp-based RIAA MM stage incorporating a 12 dB /octave infrasonic filter to attenuate turntable “rumble” noise. The output feeds the Line Output as well as the soft clipped input of an A/D converter with USB Output. This can be connected to any PC for recording from vinyl disc to PC hard drive.
MC/MM Phono Stage
The moving coil preamp is a 4 transistor low distortion amplifier noise-optimised for the very low source impedance of moving coil cartridges. It uses ultra low intrinsic base resistance transistors and operates two of them in parallel push pull for a further 3 dB lowering if input noise. Its input noise is typically 60nV, or 78 dB below 0.5mV (RIAA and A weighted). It has a gain of15 times or 24 dB bringing the lowest output MC cartridges up to MM level. The input impedance is 100 ohms in parallel with 180 pF.
The Moving magnet preamp section uses a low noise low distortion opamp with RIAA equalisation and infrasonic filter in the feedback network. The gain at 1k is 35.2 dB, or 287 mV out for 5mV in with 23 dB overload margin and the frequency response is accurate within +/- 0.3 dB 50Hz-20k, +/- 1 dB 20-50Hz. The infrasonic filter has -3 dB point at 10Hz and is 14 dB down at 5 Hz. The input noise with IHF cartridge source is 0.75uV or 76 dB s/n re 5mV (RIAA and A weighted as per IHF202.)
Digital Stage
The output of the phono preamp is attenuated, further low pass filtered and fed to the input of the A/D converter. A Soft Clipping circuit is employed to prevent overdriving the A/D converter. The MM preamp has a 100 dB dynamic range and the A/D converter 89dB allowing NAD to optimise the gain for best signal to noise and lowest distortion. The A/D converter has a sampling frequency of 48kHz for USB compatibility and a THD of only 0.01% at 100% FS.
Power Supply
The power supply is an external 24V Switch Mode design that automatically adjusts to your AC supply from 100V to 240V (plug adapters included). This supply delivers raw DC to the PP-3. Internal circuitry has precision low noise series current source /shunt regulator arrangement for low impedance and noise. The digital stage is fed by the 5V USB supply of the PC thus offering total isolation of the analog and digital stages for clean low noise performance.
Specifications:
* Input impedance (R and C) - MM: 47kohms + 200pF
* Input impedance (R and C) - MC: 47kohms + 180pF
* Input sensitivity - MM: 0.35mV
* Input sensitivity - MC: 5mV
* Input overload at 20Hz/1kHz/20kHz - MM: 0.65/6.5/60 mV
* Input overload at 20Hz/1kHz/20kHz - MC 10/100/900mV
* Signal/Noise ratio (A-weighted w/ cartridge) - MM: 78dB A wtd.
* Signal/Noise ratio (A-weighted w/ cartridge) - MC 76 dB A wtd.
* RIAA response accuracy MM,MC: +/- 0.3 dB 50Hz-20k
* Dimensions (W×H×D): 135 x 35 x 70 mm