Description
Supports DSD 11.2MHz and PCM 384kHz/32bit playback
Like the UD-501, the UD-503 employs the same high-end audio-derived design concept of "dual monaural configuration" and is equipped with two of the latest Asahi Kasei Electronics VERITA AK4490 DAC chips for native playback of advanced DSD 11.2MHz and PCM 384kHz/32bit formats. The UD-503 supports native playback of advanced DSD 11.2MHz and PCM 384kHz/32bit formats.
UD-503
UD-503
TEAC-HCLD Circuit" Realizes D/A Converter Section with Superior Expression
The analog output circuit, which can be considered the cornerstone of audio, is newly equipped with four circuits of the TEAC-HCLD circuit, a buffer amplifier with enhanced current transmission, and is fully balanced for XLR balanced output and driven in parallel unbalanced for RCA unbalanced output.
The D/A converter section with expressive power beyond its class has been realized.
Ratings
Digital Audio Input
COAXIAL
RCA pin terminals (gold-plated) 1 system
1 x 3.5mm mini-jack (used in combination with optical mini-terminal OPTICAL digital input, auto-detection)
Input level 0.5Vp-p
Input impedance 75Ω
PCM data
Sampling frequency 32/44.1/48/88.2/96/176.4/192kHz
Quantization bit rate 16/24bit
DSD data
Sampling frequency 2.8MHz
(Compatible with 176.4kHz/24bit DoP transmission)
OPTICAL
Rectangular optical digital terminal (1 channel)
Optical mini jack: 1 channel (shared with 3.5mm mini jack COAXIAL digital input terminal, auto detection)
Input level -24.0 to -14.5 dBm peak
PCM data
Sampling frequency 32/44.1/48/88.2/96/176.4/192kHz
Quantization bit rate 16/24bit
DSD data
Sampling frequency 2.8MHz
(Compatible with 176.4kHz/24bit DoP transmission)
USB terminal
Terminal USB B terminal 1 channel (USB 2.0 compliant)
PCM data
Sampling frequency 32/44.1/48/88.2/96/176.4/192/352.8/384kHz
Quantization bit rate 16/24/32bit
DSD data
Sampling frequency 2.8/5.6/11.2MHz
Analog audio input
Terminal RCA pin terminals (gold-plated) 1 system
Input impedance 51kΩ
Input sensitivity 130mV
Analog audio output
Pin jacks
Balanced output XLR 3-32 terminals (gold plated) 1 system
Unbalanced output RCA pin terminals (gold-plated) 1 system
Output impedance
Balanced output 188 ohms
Unbalanced output 150 ohms
Maximum output level
Fixed 0dB 2.0Vrms (XLR/RCA)
Fixed +6dB 4.0Vrms (XLR/RCA)
Variable 12.0Vrms (XLR), 6Vrms (RCA)
Frequency response 5Hz to 80kHz (+1dB/-3dB)
S/N Ratio
112dB (A-weighted, 1kHz) on balanced output
110dB (A-weighted, 1kHz) at unbalanced output
Total harmonic distortion ratio 0.0015% (1kHz, LPF: 20Hz to 20kHz)
Headphone output
2 x 6.3mm stereo standard jacks (gold-plated)
Supported drive systems Balanced drive, active ground drive, unbalanced drive
Jack polarity
Balanced drive Tip: HOT, Ring: COLD, Shield: GND (used in pairs)
Active ground drive Tip: HOT, Ring: COLD, Shield: GND (use in pairs)
Unbalanced drive Tip: L, Ring: R, Shield: GND (can be used as 2 sets of headphone terminals)
Maximum output
700mW + 700mW (at 32Ω load, distortion rate 1%) when connected balanced
500mW + 500mW (at 32Ω x1 load, distortion rate 1%) with unbalanced connection
350mW + 350mW (at 32Ω x2 load, distortion rate 1%)
Supported headphone impedance 16 to 600 ohms
Clock input
BNC terminals (gold-plated)
Input frequency 10MHz
Input impedance 50Ω
Input level
Square wave TTL level equivalent
Sine wave 0.5 to 1.0Vrms
Main audio settings
Up conversion 8x, 4x, 2x, off (switchable)
Digital Filter
DSD cutoff frequency 50kHz, 150kHz (switchable)
PCM digital filter FIR sharp, FIR slow, short delay sharp, short delay slow (switchable)
Line output RCA, XLR2 (No.2 HOT), XLR3 (No.3 HOT) (switchable)
Line output level Fixed 0dB, Fixed +6dB, Variable, Off (switchable)
Power supply AC 100V, 50/60Hz
Power consumption 16W (0.4W in standby mode)
Dimensions 290(W) x 84.5(H) x 248.7(D) mm (including projections)
Weight 4.2 kg
