Pioneer A-50DA 90wpc Stereo Amplifier with Phono and USB Digital Inputs. 

The A-50DA is open to all current end music formats Its high-grade phono input deals with the signals from record players, while four golden cinch inputs are ready for all types of Players. Digital formats are dealt with by a highly modern D/A converter based on the ESS SABRE Ultra. Via asynchronous USB transfer this converter also supports ultra-high-resolution material with 32 bit and up to a sampling rate of 384 kHz, as well as native DSD with up to four times the rate (11.2 MHz). The switch output stages in the A-50DA specially developed for use with music supply 90 watts per channel; a mains transformer of large dimensions with separate windings for the power amplifier, pre-amplifier and controls ensure a stable feed, including with highly-dynamic encoded material. A thick aluminium front panel, metal knobs, massive screw terminals and, last but not least, a high-grade remote control ensure that everyday use of the A-50DA will provide as much enjoyment as its sound.

Play high-resolution audio files
Connect your computer directly via the asynchronous USB port. The integrated  ESS ES9016S D/A converter processes signals itself with top resolution types such as Quad DSD with up to 11.2 megahertz, and PCM files in WAV or FLAC format with up to 384 kilohertz and 32 bit.   

Efficient amplification
The highly-efficient MOSFET Class D amplifier supplies 90 watts per channel and facilitates extremely dynamic, detailed and precise sound reproduction.

Perfect for lovers of vinyl
Connect your record player very easily to the phono input using an MC system and enjoy your vinyl collection in the best quality.

AUDIO FEATURES
90 W + 90 W (20 Hz-20 kHz, THD 0.5 %, 4 ohms)
65 W + 65 W (20 Hz-20 kHz, THD 0.5 %, 8 ohms)
THD: 0.02 % (Rated Output -3 dB, 8 ohms, 1 kHz)
Guaranteed Speaker Impedance: 4-16 ohms (A or B), 8-32 ohms (A+B), 4-16 ohms (Bi-Wiring)
Frequency Response (Measured with DIRECT button switched on): SACD/CD, NETWORK, LINE1, LINE2 5 Hz-50 kHz, ±3 dB
RIAA Deviation: PHONO MM 20 Hz-20 kHz, ±0.5 dB
Signal-to-Noise Ratio (IHF, A Network, Short Circuited)
SACD/CD: 101 dB, Phono: 89 dB (MM: 5 mV input)
Power Amp Direct: 110 dB
Channel Separation
SACD/CD: 90 dB (100 Hz), 84 dB (1 kHz), 75 dB (10 kHz)
Power Amp Direct: 95 dB (100 Hz), 95 dB (1 kHz), 80 dB (10 kHz)
Pure Audio Grade High Efficiency Power ›› MOSFET Amplifier (Class D Amplifier)
Separated Construction for Preamp and Power Amp
Isolated Power Supply
Source Direct Mode
Highly Acclaimed ESS SABRE32 Ultra DAC
384 kHz/32-bit USB-DAC for Asynchronous Transfer
Trans-Stabilizer
Speaker A, B, A+B Selector

CONNECTIONS
Gold-Plated Analogue Audio Input (Phono MM, CD, LINE 1, LINE 2, NETWORK, USB, COAXIAL, POWER AMP DIRECT IN)
USB Input for Asynchronous Transmission
Digital Coaxial Input
Digital Optical Input
Audio Output (LINE 2, PHONES)
SR In/Out
AC Inlet (Large Type)

DIMENSIONS & WEIGHT
Dimensions (W x H x D): 435 x 138.5 x 357 mm
Weight: 11.2 kg