[🎶SG] TEAC UD-507 (UD507) Reference Discrete DAC and Amplifier

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TEAC UD-507 Reference Discrete DAC, Pre Amp, Headphone Amp

> Highly Musical Discrete DAC Designed and Developed In-House
> Fully Balanced Dual Monaural Headphone Amplifier
> High-Quality Preamplifier with Multiple Analog/Digital Inputs
> Full-stage dual monaural/balanced circuit configuration for excellent channel separation
> 22.5MHz DSD and 384kHz/32bit PCM playback as USB DAC
> Preamplifier with 5 digital inputs (USB Type-B (rear), USB Type-C (front), Coaxial, Optical, Bluetooth) and 2 analog inputs (RCA, XLR)
> Full MQA decoder, supporting all digital inputs except Bluetooth®
> “RDOT-NEO” up-conversion function (2xFs/4xFs/8xFs)
> Bluetooth® receiver supporting high quality audio codecs including LDAC and aptX™ HD
> Proprietary “TEAC-HCLD2” output buffer circuit for powerful current transmission
> "TEAC-QVCS" high-resolution analog preamplifier circuit

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Descriptions:

> Proprietary DAC: The TEAC Reference Discrete DAC (TRDD 5) processes all digital signals at 64bit/512Fs and features 16 elements per channel for high-quality analog output. It supports 22.5MHz DSD and 384kHz/32bit PCM, offering a choice between multi-bit and 1-bit delta-sigma methods.
> Clock and Synchronization: The device uses 44.1kHz and 48kHz internal clocks with high-precision oscillators and supports an external 10MHz clock input for enhanced audio quality.
> Dual Monaural Design: The D/A converter and analog output stage are built with independent circuits for left and right channels to avoid interference and improve soundstage clarity.

> Balanced Signal Transfer: The UD-507 features fully balanced analog output for better signal-to-noise ratio and dynamic range.
> Toroidal Transformers & Power Supply: Two separate toroidal transformers are used for analog and digital processing to reduce interference, with a no-feedback power supply for better musical reproduction.
> Preamp Functionality: The device acts as a high-quality preamplifier with multiple digital and analog inputs and a variable gain system for precise volume control.

> Enhanced Current Output: TEAC-HCLD2 circuits provide improved current transfer for analog outputs, ensuring detailed transmission of dynamic audio signals.
> Headphone Amplifier: A dedicated headphone amplifier supports balanced and high-impedance headphones, offering an active ground method to reduce hum and noise.
> MQA Support: The UD-507 decodes MQA files, enabling playback of high-quality audio that mimics the original studio master.

> Up-Sampling: It can upsample PCM signals up to 384kHz with RDOT-NEO technology to enhance audio quality.
> Bluetooth Connectivity: The UD-507 supports high-quality wireless audio transmission via LDAC, Aptx™ HD, and multi-point connections for seamless switching between devices.
> Stable USB Transfer: Bulk Pet USB transfer technology ensures steady data transmission, reducing audio dropouts during high-resolution playback.

> Vibration Control: The device is designed with TEAC’s original Stressless Feet v2, which has a gap between the bottom plate and the foot and a transformer that is suspended from the base plate in a floating structureto minimize vibrations affecting sound quality.
> TEAC HR Audio Player: Software for Windows and Mac that supports 22.5MHz DSD and 384kHz/32bit PCM playback with easy USB setup.

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Specifications:

> 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, 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®:
  > 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 devices: maximum 8 devices
  > No. of multipoint connection devices: 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 level 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: 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: 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 consumption: 18W (0.4W in standby)
> Dimensions: 290(W)×85(H)×249 (D) mm / 11.4”(W)×3.3”(H)×9.8”(D)
> Weight: 4.9kg / 10.8lbs

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