Teac UD-507 USB DAC/Preamplifier/Headphone Amplifier

Teac UD-507 USB DAC/Preamplifier/Headphone Amplifier

The Teac UD-507 combines a USB DAC, an analog preamplifier and a headphone amplifier in a single unit. It handles DSD up to 22.5 MHz and PCM up to 384 kHz/32 bit and includes an MQA Full Decoder.

D/A Conversion

The proprietary TEAC Reference Discrete DAC (TRDD 5) processes incoming digital signals at 64 bit/512 Fs via a delta-sigma modulator in the FPGA and converts them to analog through 16 elements per channel. DSD signals are processed directly, while PCM signals are first converted to a 1-bit signal. Two operating modes can be selected: multi-bit delta-sigma method or 1-bit delta-sigma method.

Clock and USB Transfer

• Internal clocks for the 44.1 kHz and 48 kHz series with low-phase-noise crystal oscillators
• External 10 MHz clock input (BNC)
• USB Asynchronous Transfer Method to synchronize with the internal crystal oscillator
• Bulk Pet USB transfer technology with four preset transfer modes

Construction

• Dual-mono design with separate L/R channels throughout the analog output section
• Fully balanced signal transmission from the D/A converter to the output stage
• Two toroidal core transformers, one each for the analog and digital boards
• Feedback-free circuit in the analog power supply section
• Floating-mounted transformer, Stressless Feet v2 and a 2.8 mm thick top plate for vibration control

Preamplifier and Inputs

• Analog volume control via TEAC-QVCS (Quad Volume Control System) in 0.5 dB steps
• TEAC-HCLD2 enhanced-current output buffer circuits
• 2 digital inputs coaxial and optical, 2 line inputs (RCA and XLR)

Headphone Amplifier

The dedicated headphone amplifier uses four diamond buffer circuits and allows connection of balanced headphones. It supports headphones up to 600 ohms. Switchable between balanced and active-ground operation. Outputs: 4.4 mm Pentaconn jack, 6.3 mm jack and 4-pin XLR.

Further Functions

• MQA Full Decoder, also for digital inputs (e.g. MQA CD via CD player)
• Up-sampling via RDOT-NEO by 2x, 4x or 8x, up to a maximum of 384 kHz
• Bluetooth receiver (version 4.2) with LDAC, LHDC, aptX HD, aptX, AAC and SBC, plus multipoint connection
• Teac HR Audio Player for Windows and Mac (free of charge)

Connections and Outputs

• Digital inputs: coaxial, optical/Toslink, BNC (10 MHz), USB-B, USB-C
• Analog inputs: RCA, XLR
• Analog outputs: RCA (max. 2 Vrms), XLR (max. 2 Vrms at 0 dB, 4 Vrms at +6 dB)
• Headphone outputs: 4.4 mm (Active Ground 900 mW + 900 mW into 32 Ω, balanced 1200 mW + 1200 mW into 100 Ω, unbalanced 900 mW + 900 mW into 32 Ω), 6.3 mm, XLR (1200 mW + 1200 mW into 100 Ω)
• 12 V trigger (out)

Technical Data

• THD: 0.01 % or less (1 kHz, LPF 20 Hz to 20 kHz)
• Signal-to-noise ratio: 105 dB
• Frequency response: 5–70,000 Hz
• Channels: 2
• Power supply: 220–240 V, 50 Hz, 0.4–18 W
• Dimensions (H × W × D): 8.5 × 29 × 24.9 cm
• Weight: 4.9 kg

Included Accessories

• Power cable
• Remote control RC-1334
• 2 × AAA batteries for the remote control
• 3 × foot pads
• Owner's manual (with warranty)

Delivery Time:
The delivery time is shown on the product page / in the listing.

2-Year Manufacturer Warranty:
This product comes with a 2-year manufacturer warranty. Depending on the manufacturer, a longer warranty period may apply — please refer to the manufacturer's terms for details.

14-Day Return Policy:
If the product arrives damaged due to the shipping company, Audio Everywhere will cover the return shipping costs.

Teac UD-507 USB DAC/Preamplifier/Headphone Amplifier

The Teac UD-507 combines a USB DAC, an analog preamplifier and a headphone amplifier in a single unit. It handles DSD up to 22.5 MHz and PCM up to 384 kHz/32 bit and includes an MQA Full Decoder.

D/A Conversion

The proprietary TEAC Reference Discrete DAC (TRDD 5) processes incoming digital signals at 64 bit/512 Fs via a delta-sigma modulator in the FPGA and converts them to analog through 16 elements per channel. DSD signals are processed directly, while PCM signals are first converted to a 1-bit signal. Two operating modes can be selected: multi-bit delta-sigma method or 1-bit delta-sigma method.

Clock and USB Transfer

• Internal clocks for the 44.1 kHz and 48 kHz series with low-phase-noise crystal oscillators
• External 10 MHz clock input (BNC)
• USB Asynchronous Transfer Method to synchronize with the internal crystal oscillator
• Bulk Pet USB transfer technology with four preset transfer modes

Construction

• Dual-mono design with separate L/R channels throughout the analog output section
• Fully balanced signal transmission from the D/A converter to the output stage
• Two toroidal core transformers, one each for the analog and digital boards
• Feedback-free circuit in the analog power supply section
• Floating-mounted transformer, Stressless Feet v2 and a 2.8 mm thick top plate for vibration control

Preamplifier and Inputs

• Analog volume control via TEAC-QVCS (Quad Volume Control System) in 0.5 dB steps
• TEAC-HCLD2 enhanced-current output buffer circuits
• 2 digital inputs coaxial and optical, 2 line inputs (RCA and XLR)

Headphone Amplifier

The dedicated headphone amplifier uses four diamond buffer circuits and allows connection of balanced headphones. It supports headphones up to 600 ohms. Switchable between balanced and active-ground operation. Outputs: 4.4 mm Pentaconn jack, 6.3 mm jack and 4-pin XLR.

Further Functions

• MQA Full Decoder, also for digital inputs (e.g. MQA CD via CD player)
• Up-sampling via RDOT-NEO by 2x, 4x or 8x, up to a maximum of 384 kHz
• Bluetooth receiver (version 4.2) with LDAC, LHDC, aptX HD, aptX, AAC and SBC, plus multipoint connection
• Teac HR Audio Player for Windows and Mac (free of charge)

Connections and Outputs

• Digital inputs: coaxial, optical/Toslink, BNC (10 MHz), USB-B, USB-C
• Analog inputs: RCA, XLR
• Analog outputs: RCA (max. 2 Vrms), XLR (max. 2 Vrms at 0 dB, 4 Vrms at +6 dB)
• Headphone outputs: 4.4 mm (Active Ground 900 mW + 900 mW into 32 Ω, balanced 1200 mW + 1200 mW into 100 Ω, unbalanced 900 mW + 900 mW into 32 Ω), 6.3 mm, XLR (1200 mW + 1200 mW into 100 Ω)
• 12 V trigger (out)

Technical Data

• THD: 0.01 % or less (1 kHz, LPF 20 Hz to 20 kHz)
• Signal-to-noise ratio: 105 dB
• Frequency response: 5–70,000 Hz
• Channels: 2
• Power supply: 220–240 V, 50 Hz, 0.4–18 W
• Dimensions (H × W × D): 8.5 × 29 × 24.9 cm
• Weight: 4.9 kg

Included Accessories

• Power cable
• Remote control RC-1334
• 2 × AAA batteries for the remote control
• 3 × foot pads
• Owner's manual (with warranty)

Delivery Time:
The delivery time is shown on the product page / in the listing.

2-Year Manufacturer Warranty:
This product comes with a 2-year manufacturer warranty. Depending on the manufacturer, a longer warranty period may apply — please refer to the manufacturer's terms for details.

14-Day Return Policy:
If the product arrives damaged due to the shipping company, Audio Everywhere will cover the return shipping costs.

Delivery time

Right above the "Add to cart" button you'll see your personal delivery window — calculated automatically and continuously updated.

Shipping costs

• Germany: free shipping from €250
• EU-wide: free shipping from €350
• Switzerland, Norway, United Kingdom: free shipping from €1,000

Deliveries outside the EU

For deliveries outside the EU, German VAT is deducted from the displayed price — you pay the net price. Please note: additional costs may arise in the destination country, e.g. import duties, import taxes or local charges. These costs are beyond our control and are borne by the buyer.

Returns

Audio Everywhere offers a 14-day return policy. If the package arrives damaged, we cover the return shipping costs. For questions about returns, you can reach us by email, WhatsApp or phone — please include your order number.

For details on warranty and guarantee, please refer to the respective product description.

Taxes and pricing according to German VAT law (UStG)

Consumers in Germany and the EU

All prices include the applicable VAT according to § 1 para. 1 in conjunction with § 12 UStG. Taxation within the EU follows the One-Stop-Shop procedure under § 18j UStG. The VAT rate of the respective destination country applies.

Deliveries to third countries (outside the EU)

Deliveries outside the EU are VAT-exempt according to § 4 no. 1a UStG in conjunction with § 6 UStG. German VAT is deducted from the displayed price — you pay the net price. Please note: additional costs may arise in the destination country, in particular import duties, import taxes or local charges. These are beyond our control and are borne by the buyer.

Used products (margin scheme)

For used products we apply the margin scheme according to § 25a UStG. In this case, no VAT is shown.

B-stock

B-stock items do not fall under the margin scheme. Regular VAT applies to B-stock and is shown accordingly.

Safety information — Audio Everywhere

These notes apply to all HiFi devices and accessories sold by us.

Electronic devices (amplifiers, streamers, CD players, turntables)

Operate only in dry, enclosed indoor spaces. Avoid moisture, direct sunlight and extreme temperatures. Use only the specified mains voltage — do not overload power strips. Do not switch on devices with damaged cables or housings. Keep ventilation slots clear: at least 10 cm distance from walls and other devices. Place stably and securely — no open liquid containers nearby. Keep out of reach of children and pets.

Speakers

Place on a stable surface or suitable stands. No moisture, no direct sunlight. Operate only with matching amplifiers and correctly polarised cables. Do not use as a storage surface. Keep out of reach of children and pets.

Cables (speaker cables, RCA, power cables)

Use only for the intended purpose. Always pull by the plug, never by the cable. Avoid kinks, sharp edges and pressure from heavy objects. Replace visibly damaged cables immediately. Keep out of reach of children and pets.

Accessories (adapters, mounts, cleaning agents, styli, headshells)

Use only according to the manufacturer's instructions. No aggressive cleaning agents, no damp environments. Store small parts safely due to choking hazard. Mount accessories correctly to avoid damage or malfunction.

General notes

Read the operating instructions before use. No unauthorised repairs or opening of devices. Always contact a specialist service for technical problems. We are happy to answer any questions about safe use at any time.