TEAC UD-507 USB DAC/Headphone Amplifier/Preamp

Completely redesigned 500 Series DAC/Preamp/Headphone amplifier with high-end 700 Series design concept in a compact A4-size package. The UD-507 is equipped with our proprietary “TRDD 5” discrete DAC, designed with musicality as the top priority. Following in the footsteps of TEAC's acclaimed 701 series, the new “TRDD 5” discrete DAC offers a clear soundstage and accurate imaging, providing listeners with a truly immersive musical experience. Fully Balanced Dual Monaural Headphone Amplifier The UD-507 is a headphone amplifier featuring the TEAC-HCLD2 high current line driver, which is characterized by its high current supply capability. Compared to the previous model, the maximum output power has been greatly improved by strengthening the power supply, resulting in a generous driving power of 1,200mW + 1,200mW (balanced output at 100 ohm load), which is comparable to a dedicated headphone amplifier without DAC. The power amplifier gain can be switched between 3 positions (Low/Mid/High) to fine-tune the output to best match the sensitivity and impedance of the headphones. High-Quality Preamplifier with Multiple Analog/Digital Inputs The UD-507 incorporates the TEAC-QVCS high precision analog volume attenuator and the powerful TEAC-HCLD2 high current line buffer circuit. With five digital inputs and two analog inputs (unbalanced and balanced), a wide variety of devices can be connected.   Specs Supported formats   USB input   PCM 16/24/32 bit 44.1k/48k/88.2k/96k/176.4k/192k/352.8k/384k Hz DSD 2.8M/5.6M/11.2M/22.5M Hz Coaxial digital input   PCM 16/24 bit 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz DSD 2.8MHz (supported with 176.4kHz/24-bit DoP format) Optical digital input   PCM 16/24 bit 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz DSD 2.8MHz (supported with 176.4kHz/24-bit DoP format) DAC section   USB DAC In-house designed Discrete DAC TRDD5 Up-conversion up to 384kHz/32-bit PCM, 22.5MHz DSD Audio inputs   USB USB Type-C port × 1 USB Type-B port × 1 USB version 2.0 Transfer Mode Asynchronous mode transfer, Bulk Pet Compatible Software TEAC HR Audio Player (Windows, Macintosh) COAXIAL digital (rear) RCA pin ×1 (gold-plated) Input level 0.5Vp-p Input impedance 75Ω Optical digital (rear) TOS-link ×1 Input level -24.0 to -14.5dBm peak Analog (Balanced) XLR ×1 pair (gold-plated) Input impedance 50kΩ Input sensitivity 5Vrms Analog (Unbalanced) RCA pin ×1 pair (gold-plated) Input impedance 24kΩ Input sensitivity 2.5Vrms Bluetooth®   Bluetooth® version 4.2 Output class Class2 (Range: approx. 33ft/10m) Supported profiles A2DP, AVRCP Content protection SCMS-T Supported codec LDAC™, LHDC, Qualcomm® aptX™ HD, aptX™, AAC, SBC No. of paired device maximum 8 devices No. of multipoint connection device maximum 2 devices Audio outputs   XLR balanced XLR ×1 pair (gold-plated) Maximum output level 1kHz, full scale, into 10kΩ  0dB setting 2.0Vrms +6dB setting 4.0Vrms Output impedance 40Ω RCA unbalanced RCA pin ×1 pair (gold-plated) Maximum output leve 1kHz, full scale, into 10kΩ  0dB setting 2.0Vrms Output impedance 20Ω Headphone outputs   Connector 1 1/4” (6.3mm) TRS stereo jacks × 1 (gold-plated) Connector 2 XLR 4pin jack ×1 (gold-plated) Connector 3 4.4mm 5-pole Pentaconn jack ×1 (gold-plated) Maximum output   Balanced 1200mW + 1200mW (into 100Ω) Active Ground 900mW + 900mW (into 32Ω) Unbalanced 900mW + 900mW (into 32Ω) Supported impedances 16 to 600Ω Clock section   External clock input   Connector BNC (gold-plated) Input frequency 10MHz Input impedance 50Ω Input level Rectangle wave: equivalent to TTL levels Sine wave: 0.5 to 1.0 Vrms External control   12V Trigger out   Conenctor 3.5mm Monaural Mini jack × 1 Output level 12V Max. current supply 100mA Audio performance 192kHz/24bit PCM input, RCA output, DAC mode MULTIBIT Frequency Response 5Hz to 70kHz (+1/–6 dB) Total harmonic distortion 0.01% or less (1kHz, LPF: 20Hz to 20kHz) S/N ratio 105dB or higher (A-weight, 1kHz) Power supply   US/Canada AC 120V 60Hz UK/Europe AC 220 to 240V 50Hz Power consumption 18W (0.4W in standby) dimensions (including protrusions) 290(W)×85(H)×249 (D) mm / 11.4”(W)×3.3”(H)×9.8”(D) Weight 4.9kg / 10.8lbs Included accessories Power cord, Remote control (RC-1334), AAA Batteries for remote control × 2, feet cushions × 3, Owner's Manual (with warranty)   Up-conversion table Input Frequency Up-converted Frequency Coax/Opt USB off 2Fs 4Fs 8Fs 32kHz – 32kHz 64kHz 128kHz 256kHz 44.1kHz 44.1kHz 44.1kHz 88.2kHz 176.4kHz 352.8kHz 88.2kHz 88.2kHz 88.2kHz 88.2kHz 176.4kHz 352.8kHz 176.4kHz 176.4kHz 176.4kHz 176.4kHz 176.4kHz 352.8kHz – 352.8kHz 352.8kHz 352.8kHz 352.8kHz 352.8kHz 48Hz 48Hz 48kHz 96kHz 192kHz 384kHz 96kHz 96kHz 96kHz 96kHz 192kHz 384kHz 192kHz 192kHz 192kHz 192kHz 192kHz 384kHz – 384kHz 384kHz 384kHz 384kHz 384kHz No conversion * Maximum up-conversion rate is 8Fs.   Comparison with previous models   UD-507 UD-505-X UD-505 UD-503 UD-501 USB DAC TRDD 5 ×1 (L/R) ES9038 Q2M ×2 (L/R) AK4497 ×2 (L/R) AK4490 ×2 (L/R) PCM 1795 ×2 (L/R) Supported DSD formats 22.5MHz maximum 22.5MHz maximum 22.5MHz maximum 11.2MHz maximum 5.6MHz maximum Supported PCM formats 384kHz/32-bit maximum 768kHz/32-bit maximum 768kHz/32-bit maximum 384kHz/32-bit maximum 384kHz/32-bit maximum Up-conversion (Max) PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs) DSD: 24.5MHz (DSD 256, 512) PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs) DSD: 24.5MHz (DSD 256, 512) PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs) DSD: 12.2MHz (DSD 256) PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs) PCM: 192kHz/24-bit (fixed) Dual monaural Yes Yes Yes Yes Yes Current buffer circuit TEAC-HCLD2 TEAC-HCLD2 TEAC-HCLD TEAC-HCLD - TEAC QVCS circuit (High-precision volume) Yes Yes Yes Yes - Line/balanced outputs Yes Yes Yes Yes Yes Line parallel/ unbalanced outputs Yes Yes Yes Yes Yes High-precision dual clock Yes Yes Yes Yes Yes External clock input Yes Yes Yes Yes – Preamplifier function Yes Yes Yes Yes – Bulk Pet transmission Yes Yes Yes – – Line output level switching Fixed (0 dB) Fixed (+6 dB) Variable Path Thru Off Fixed (0 dB) Fixed (+6 dB) Variable Off Fixed (0 dB) Fixed (+6 dB) Variable Off Fixed (0 dB) Fixed (+6 dB) Variable Off – (Line output on/off selection only when headphones connected) Front digital input Yes (USB Type-C) Yes (Combined coaxial/optical mini jack) Yes (Combined coaxial/optical mini jack) Yes (Combined coaxial/optical mini jack) – Analog line inputs 2 pairs (XLR, RCA) 1 pair (RCA) 1 pair (RCA) 1 pair (RCA) - Bluetooth® receiver Yes Yes Yes – – Headphone amplifier circuit Current-strengthening circuit Current-strengthening circuit Current-strengthening circuit Current-strengthening circuit Op-amp Headphone output connectors/ drive modes XLR 4pin ×1 Balanced Active ground 4.4mm 5-pole ×1 Balanced Active ground Standard 6.3mm × 1 Unbalanced 4.4mm 5-pole ×1 Balanced Active ground Standard 6.3mm ×2 Balanced Active ground Unbalanced 4.4mm 5-pole ×1 Balanced Active ground Standard 6.3mm ×2 Balanced Active ground Unbalanced Standard 6.3mm ×2 Balanced Active ground Unbalanced 3.5mm stereo mini ×1 Unbalanced Feet Stressless Foot v2 Stressless Foot Pin-point foot Pin-point foot Conventional insulated foot Remote control Yes Yes Yes Yes –