Pioneer A-50DV

Commentary

Stereo pre-main amplifier with DAC mounted on A-515V to support digital input.

The digital signal is raised 8 times to 352.8 kHz, and 8 times oversampling is used to reduce unwanted aliasing noise. This makes it possible to use a low-order analog filter with loose characteristics as the final stage analog filter, thereby achieving low-distortion sound quality with less high-frequency phase rotation.

The D/A converter is equipped with a twin linear envelope D/A converter to reduce distortion factor.
In addition, L/R-independent twin configuration realizes separation characteristics with little phase difference.
Furthermore, since it is a glitch less type that does not require a deglitch circuit, it has excellent reproducibility of minute signals.

In addition to the normal analog output, it is equipped with a digital output so that it can be connected to other digital audio equipment without passing through the internal analog circuit.
It is also equipped with an optical transmission distortion correction circuit to reduce pulse width distortion.

Source Direct is installed so as not to lose sound purity.

Non-switching circuit TypeII is used to achieve sound with less distortion.

Model Rating

Type	Stereo pre-main amplifier with built-in D/A converter
<Audio section>
Rated Output (Both channel drive)	1kHz: 110W + 110W (4 Ω, 0.003%) 20 Hz to 20 kHz : 95W + 95W (4 Ω, 0.02%) 80W + 80W (6 Ω, 0.015%) 70W + 70W (8 Ω, 0.008%)
Damping factor	100 (1 kHz, 8 Ω)
Input Sensitivity / Impedance	Phono MC : 0.2mV/100 Ω Phono MM : 2.5mV/50k Ω CD, Tuenr, DAT/Tape1, 2, BS, VDP, TV/AUX, VCR : 150mV/40k Ω
Phono maximum allowable input (1 kHz, 0.008%)	Phono MM:150mV Phono MC:12mV
Output Level / Impedance	DAT/Tape1, 2, Rec, Adaptor Out : 150mV/2.2k Ω
Frequency characteristic	Phono MC : 20 Hz to 20 kHz ± 0.5 dB Phono MM : 20 Hz to 20 kHz ± 0.3 dB CD, Tuner, DAT/Tape1, 2, BS, VDP, TV/Aux, VCR : 5 Hz to 100 kHz + 0 -3dB
Signal-to-noise ratio (A network Short circuit)	Phono MC:70dB(0.25mV) Phono MM:88dB(2.5mV) CD, Tuner, DAT/Tape1, 2, BS, VDP, TV/AUX, VCR : 107 dB
Tone Control at -40dB	Bass : 100 Hz, ± 8 dB Treble : 10 kHz, ± 8 dB
Loudness contour	100 Hz : 5 dB, 10 kHz : 3 dB
Speaker load impedance	A, B : 4 Ω ~ 16 Ω A + B : 8 Ω ~ 32 Ω
Digital Part
Distortion Factor (1 kHz, 0 dB)	0.005%
Signal-to-noise ratio	103 dB or more
Frequency characteristic	4 Hz to 20 kHz ± 0.5 dB
<Video Part>
Input Sensitivity / Impedance	BS, VDP, TV/AUX, VCR : 1Vp-p/75 Ω, unbalanced
Output Level / Impedance	VCR → Monitor TV : 1Vp-p/75 Ω, unbalanced
DG/DP	2% / 2 °
Frequency characteristic	10 Hz to 10 MHz + 0 -1dB
Signal-to-noise ratio	60 dB or more
<General>
Power supply voltage	100 VAC, 50Hz/60Hz
AC outlet	Power switch interlock : 2 systems (200W) Power switch not linked : 1 system (100W)
Power consumption (Electrical Appliance and Material Control Law)	190W
External dimensions	Width 420x Height 126x Depth 348 mm
Weight	9.7kg