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TEAC UD-505 USB DAC and Headphone Amplifier


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Enquiry/price check? Click here SKU: TCUD505
Ex VAT: £995.83

RRP: £1,249.00


Brand new from TEAC, the UD-505 includes a dual monaural USB DAC, headphone amplifier, network player and Master Clock Generator.

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RRP: £1,249.00


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Warranty length 2 Years
Brand TEAC Audio

Tech Specs

- PCM: (16/24/32) 44.1 - 768kHz
- DSD: 2.8/ 5.6/ 11.2/ 22.5MHz
- Opt/Coax: (16/24) 32-192kHz, 2.8MHz
- DAC: USB Asahi Kasei AK4497 x 2
- Upconvert: PCM 384kHz DSD 24.5MHz
- DSD cut-off frequency: Narrow: 39


Audio input
- USB: B/2.0, asynchronous/bulk transfer
- Software: HR Audio Player (Windows, Mac)
- Coax: RCA (gold plating) 0.5V p-p, 75Ω
- Optical: TOS, -24 to -14.5 dBm peak
- Digital: 3.5mm mini terminal (Opt/Coax)
- Input level: -24.0 to -14.5 dBm peak
- Analogue: RCA pin gold plating


- Bluetooth version: 4.0
- Class: 2 (distance about 10m)
- Supported codecs: A2DP, AVRCP
- A2DP content protection: SCMS-T
- Profile: LDAC, aptX/HD, AAC, SBC
- Pairing storage: Up to 8 units


Audio output
- XLR: Balanced x1 series (gold plating)
- Output: Fixed (0, +6dB), Adjustable
- Max output level: 2/4/12Vrms (0/6/10dB)
- Output impedance: 188 Ω
- RCA: unbalanced x1 (gold plating)
- Output level: Fixed (0, +6dB), Adjustable
- Max out level: 2/4/6Vrms (0/6/10dB)
- Output impedance: 150Ω


Headphone output
- 6.3mm stereo jack: x2
- Polarity (bal): HOT, Ring: COLD, NC (GND)
- Polarity (unbal): L, Ring: R, Sleeve: GND
- 4.4mm 5-pole "pentaconn": x1
- Max out (B/UB) 2x 700mw/500w (32Ω)
- Applied impedance: 16 to 600Ω


Clock part
- Internal clock: Crystal oscillator
- Quantity: 2 units (44.1kHz or 48kHz)
- External clock: BNC (10MHz, 50Ω)
- Rectangular wave: TTL level equivalent
- Sine wave: 0.5 to 1.0 Vrms


Audio performance
- Frequency: 10Hz to 80kHz (1/-3dB, 192kHz)
- THD: 0.002% or less
- SNR: 110 dB or more


- Power supply: AC 100 V, 50/60 Hz
- Power consumption: 18W (0.3W at standby)
- Dimensions (WHD): 290 x 84.5 x 248.7mm
- Weight: 4.2kg

Product Description

TEAC UD-505 is a dual monaural USB DAC and fully balanced headphone amplifier that condenses TEAC's audio design expertise cultivated over many years in a compact A4-size enclosure and the high-end audio design philosophy.


The DAC chip "VERITA AK4497" by Asahi Kasei is installed on each of the left and right channel. It is the latest flagship DAC compatible with maximum DSD 24.5MHz, PCM 768kHz / 32bit. It achieves the industry lowest distortion ratio. Furthermore, OSRD (Over Sampling Ratio Doubler) technology has greatly reduced out-of-band noises and obtains delicate articulacy ideal for high res source that processes beyond audible range.

Dual Monaural

TEAC adopted a deluxe circuit with a consistent dual monaural configuration ranging from the power transformer to the power supply circuit, the DAC section, and the analogue output stage. The dual-monaural configuration which has two circuits with stable current supply capability is reciprocally based on L/R channels and prevent interference for a rich musical expression. In addition, full balanced transmission of analogue output signals of L / R from DAC to the final output stage contributes greatly to the improvement of S/N and expansion of dynamic range.

Bluetooth Unit

In addition to the LDAC codec that delivers audio data with a sound quality equivalent to high resolution; it also supports Qualcomm aptX HD and general-purpose codecs such as AAC, Qualcomm aptX, SBC etc. You can enjoy high-quality wireless playback easily from Smartphone or DAP (Digital Audio Player).

10MHz External Clock

USB audio is not synchronised with the unstable and noisy computer's clock, but via USB asynchronous transfer method that conveys PCM and DSD data in synchronisation with the high-precision crystal oscillator. There are two types of dedicated clocks, 44.1kHz and 48kHz, and by applying an audio grade crystal oscillator featuring low phase noise to each input signal, the influence of jitter on sound quality is greatly suppressed and the original sound is faithfully reproduced.

Up-Conversion Function

With the "RDOT-NEO" (Refined Digital Output Technology NEO) using the fluency algorithm to smoothly complement the digital audio signal, it has the function to up-convert the PCM digital signal up to 384kHz and the maximum DSD 24.5MHz.

USB Transmission

When sending a huge amount of digital data of a high-resolution sound source with the USB cable, USB transmission technology "Bulk Pet" enables stable data transfer. This is attained by averaging the load on both processes. Sound quality changes with the load condition of the PC, so you are able to choose from the four pre-set transfer modes.

Toroidal core transformer

A large-capacity toroidal core power transformer that supplies stable current is mounted one each for the left and right channels. In this case, the dual monaural design is passed and stable current supply is enabled for each channel without being influenced by the change of current consumption related to the other signal processing.

High Visibility OLED Display

The full-dot OLED (organic EL) display, which has a high contrast ratio and is easy to see, is adopted for the display section equipped with a 4-step dimmer. In addition, TEAC adopted a large font with excellent visibility so you can check data such as volume and input source from a remote listening position.

Discrete Headphone Amplifier

By using the HCLD (High Current Line Driver) circuit composed of output transistors of each of the left and right channels, even at headphone output, balanced driving headphones can be connected. In addition, even when used in single-ended mode, these transistors are driven in parallel to drive more powerfully than normal single-ended headphone amplifiers. With its own circuit design, it operates in class A at normal use of headphones / listening by expanding Class A operation area despite class AB amplifier. It will be possible to derive the potential of various types of headphones including 600 Ω high impedance type headphones.

5 pole Pentaconn terminal

On the front side, in addition to the headphone output terminal by two 3-pole TRS jacks that can be balanced, a new standard that realises stereo balance connection with one plug 4.4 mm 5pole terminal is included. This adopts "Pentaconn" for balanced headphone jacks. It is a circuit configuration that can enjoy the difference of sound by three kinds of driving methods such as active / ground and driving.

Full Metal Casing

By configuring all of the cabinets with a metal panel resistant to external noise, it is possible to suppress invasion of electromagnetic noise emitted from PC. In addition, the 8mm thick aluminium panel wrapping the metal chassis further from both sides prevents twisting and distortion for a strong and stable casing. The A4 size enclosure can be installed on a desk or a small space such as a sideboard.

3 Pin-Point Foot

A three-point support type leg enables stable installation of the main body unaffected by the slight distortion of the floor surface. By supporting the main body only at a very small point, it reduces vibration and resonance, thoroughly eliminates mid and LF distortion for a resolution and sound image localisation that emphasises the soundstage. When lifting the main body, the flange meshes to prevent the foot base from falling, and when it is grounded, it makes pin point grounding where only one point of the spike tip and the deepest part of the mortar comes into contact.

HR Audio Player

You can use free dedicated software that can easily reproduce the next generation high-resolution sound source such as DSD 22.5 MHz or PCM 768 kHz / 32 bit from Windows or Mac. The dedicated software ensures no troubles with the audio setting.

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Contact Details

UK Local Rate Number
0844 50 403 50

Sales Landline
0121 224 7300/7401

Customer Services Landline
0121 224 7350/7351

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