TEAC Announces UD-507 DAC – First Look
All Image Credit: TEAC
TEAC have recently introduced the UD-507, DAC/Preamp/Headphone Amplifier, a completely redesigned version of the earlier 500 series. This latest design comes with their proprietary TEAC Reference Discrete DAC (TRDD5) and several other features to include; a High Current Line Driver (HCLD2) for the headphone output stage and pre-amplifier buffer, a Quad Volume Control System (QVCS) driving its high precision volume control and a digital upsampling engine referred to as Refined Digital Output Technology NEO (RDOT-NEO).
The UD-507 is a headphone amplifier featuring the HCLD2 that is characterized by its high current supply capability. Supporting up to 1.2 Watts (into 100 Ohms) of headphone drive from the front panel’s three headphone sockets – single-ended quarter inch, 4.4mm balanced, XLR balanced – whose output can be adjusted via three gain settings: Low, Mid and High.
The circuit design is dual-mono and balanced from input to output, supporting both balanced XLR and unbalanced RCA on the rear panel via its QVCS high precision analog volume attenuator and the HCLD2 high current line buffer circuits. Digital connectivity is provided via three additional rear panel and one front panel inputs.
An unusual feature of this design is the DAC which is not built around an off-the-shelf audiophile DAC chip. This all in-house discrete design is designated TRDD5 and supports; MQA, 32bit/384kHz PCM and DSD512 with access over the air via the LDAC and aptX HD Bluetooth input.
Front panel headphone connectivity supports; a 1/4” (6.3mm) TRS stereo jack, an XLR 4pin jack and a 4.4mm 5-pole Pentaconn jack all of which are gold plated. A USB-C is also to be found here for direct playback from USB storage devices. Rear panel connectivity includes; asynchronous Bulk-PET USB-B for PCs and Macs, coaxial and TOSLINK, plus a 10MHz BNC input.
Control and setup is available using the front panel buttons, rotary controls and display plus the supplied RC-1341 IR remote, with hard-wired control available via its 12VDC trigger out.
Finally, the UD-507 is available in either black or silver finishes.
Key Features At A Glance:
- 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” (Refined Digital Output Technology NEO) up-conversion function (2xFs/4xFs/8xFs)
- Bluetooth receiver supporting high quality audio codecs including LDAC and aptXTM HD
- Proprietary “TEAC-HCLD2” output buffer circuit for powerful current transmission
- “TEAC-QVCS” high-resolution analog preamplifier circuit
Partial Specifications:
- Supported formats USB input: PCM16/24/32 bit – 44.1k/48k/88.2k/96k/176.4k/192k/352.8k/384k Hz, DSD2.8M/5.6M/11.2M/22.5M Hz
- Coaxial digital input: PCM16/24 bit – 32k/44.1k/48k/88.2k/96k/176.4k/192k HzDSD2.8MHz (supported with 176.4kHz/24-bit DoP format)
- Optical digital input PCM16/24 bit – 32k/44.1k/48k/88.2k/96k/176.4k/192k HzDSD2.8MHz (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 Type-C port × 1, USB Type-B port × 1, USB version2.0
- 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 impedance50kΩ, Input sensitivity5Vrms
- Analog (Unbalanced) RCA pin: ×1 pair (gold-plated), Input impedance24kΩ, Input sensitivity2.5Vrms
- Bluetooth: Version 4.2, Output class: Class 2 (Range: approx. 33ft/10m), Supported profiles: A2DP, AVRCP
- Content protection: SCMS-T
- Supported codecs: 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 ×1 pair (gold-plated), Maximum output level 1kHz, full scale, into 10kΩ: 0dB setting2.0Vrms, +6dB setting4.0Vrms, Output impedance: 40Ω
- RCA unbalanced ×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
- 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)
- External clock input Connector BNC (gold-plated), Input frequency10MHz, Input impedance50Ω, Input level Rectangle wave equivalent to TTL levels, Sine wave: 0.5 to 1.0 Vrms
Availability:
June 2024
MSRP:
- US: $2,099.99
For more information visit the TEACUSA web site.
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