With extreme audio processing options combined with the most powerful and advanced digital amplifier technology, the TDAI-3400 is the most powerful product from Lyngdorf Audio yet marketed.

True digital amplification

The TDAI-3400 amplification is 100% digital, without sound-deteriorating digital-to-analog conversion. The digital signal drives the speakers directly. This unique and technically demanding solution eliminates several analog components and signal paths, which are a major source of noise, hiss, crosstalk, and distortion in conventional amplifiers. TDAI amplifiers offer the best sound quality at all volume levels and will deliver the most enjoyable and uncolored sound you have ever experienced.

Connect audio and video sources

A variety of inputs and outputs provide plenty of options to connect your audio and video sources: Seven digital inputs including optical, coax, AES/EBU, USB-B, USB-A, two RCA analog inputs for analog music sources, one optional analog module for more analog inputs including XLR and phono MM, and one optional HDMI 2.1 module with two inputs and one ARC / eARC output.

Built-in media player

The TDAI-3400 accepts all media interfaces and features a built-in media player with the highest playback quality. Through your local network or via the USB connectors, you can access your entire library of music through the DLNA/UPnP enabled player. This media player also allows music streaming using Roon Ready, Spotify Connect, and AirPlay 2 as well as internet radio. The TDAI-3400 also supports TIDAL Connect which allows lossless audio quality with the TIDAL app as the controller, and it includes the MQA Core Decoder, which unfolds the MQA file once to deliver better than CD-quality. MQA (Master Quality Authenticated) is an award-winning British technology that delivers the sound of the original master recording.

Tailor your setup and sound

Through the web interface you can perform all setup and operations from the menu system, which allows you to tailor your setup and sound, and the digital crossover allows 3 individual output settings. With our proprietary RoomPerfect™ room-correction software to eliminate the negative influence of the listening room, the TDAI-3400 delivers a perfect sound without the need for extensive room treatment.

TDAI-3400 features

Control the TDAI-3400 with an app

The “Lyngdorf Remote” app automatically discovers the TDAI-3400 connected to your local network, and you will be able to adjust all the basic functions like input selection and volume level from your handheld device. The built-in media player can be controlled directly, and you can access music files stored on pen drives connected to the Lyngdorf TDAI-3400 as well as search all files stored on your local hard drives. Swiping left and right gives you access to cover art as well as informing you of the signal resolution.

“Lyngdorf Remote” app is available for free download from both IOS and Android.

TDAI-3400 on white furniture
TDAI-3400 and SDA-2400
TDAI-3400 in white furniture
Technical drawing of Lyngdorf TDAI-3400


Description: 2-channel integrated amplifier and audio processor
Power handling: 2×400 W RMS @ 4Ohm / 2x200W RMS @ 8Ohm
Max output current: 40A
Audio specifications: Frequency Response: ±0,5dB from 20 to 20,000 Hz, Total Harmonic Distortion: 0.05% max from 20 to 20,000 Hz, THD-N 1w/8ohm 0,04% / THD-N 1w/4ohm 0,04%
Digital inputs (asynchronous): 2 x coaxial digital (≤192kHz / 24 bit), 1 x AES-EBU digital (≤192kHz / 24 bit) 3 x optical digital (≤ 96kHz / 24 bit), 2 x USB A, 1 x USB B (≤384kHz/32 bit + DXD / DSD64 / DSD128)
Analog inputs: 2 x Analog Single Ended RCA (Max level: 4.0V = 0dBFS), 1 x Microphone input for RoomPerfect™ calibration
High-end analog input module (optional): 1 x RIAA Phono MM, 2 x single ended RCA, 1 x balanced XLR
HDMI 2.1 module (optional):
1 x HDMI Output / 2 x HDMI Inputs (PCM ≤192kHz/24bit), eARC/ARC (PCM ≤192 kHz/24bit), CEC integration, HDMI 2.1b support, HDCP 2.3
Digital outputs: 1 x coaxial digital (96kHz / 24 bit)
Analog outputs: 1 x analog single ended RCA, 1 x analog balanced XLR, 1 x headphone output 3.5mm Jack
EQ: RoomPerfect™, Pre-Equalizer, ICC, 32 x adjustable voicings holding ≤8 filters with adjustable gain and Q
Mediaplayer: Internet Radio (vTuner), Spotify Connect, Roon Ready, TIDAL Connect incl. MQA decoding, DLNA Support (uPnP/see DLNA formats), AirPlay2, Local file playback (USB)
Wireless connections: Bluetooth (for Remote Control and BLE), Wi-Fi (802.11 n/ac)
Interfaces: Web-interface, IP Control, 1 x DB9 connector for RS232 control, 1 x RJ45 Ethernet LAN connector, 2 x USB connectors (Type A) , SD card slot (Backup of filters and settings)
Accessories included: RoomPerfect™ Microphone, Microphone stand, cable & mini-jack connector, Remote control (IR / BLE)
Placement options: Optional rack mount or freestanding
Heat dissipation value: 270 BTU
Dimensions (Wx H x D):
45 x 10.5 x 36 cm (including connectors) / 17.7 x 4.1 x 14.1 inches
Weight: 8.2 kg / 18.1 lb
Finish: Matte black

Windows drivers for USB module
External control manual
Technical drawings
TDAI voicings
Latest software
Owner’s manual
Quick guide
Control4 driver
Fact sheet


Modular upgrades for TDAI

Lyngdorf TDAI-3400 HDMI 2.1 module
Analog module

HDMI 2.1 input/output module

The HDMI 2.1 module allows pass through of the higher contrast and greater detail resolution that HDMI 2.1 supports, up to 8K 50/60Hz and 4K 100/120Hz. It also supports TVs with the latest Enhanced Audio Return Channel (eARC) and CEC. The HDMI 2.1 module can be ordered with a new TDAI-3400 or fitted to an existing TDAI-3400. It provides two HDMI inputs supporting audio up to 192kHz/24 bit and one HDMI in/out with eARC/ARC.

High-end analog input module

The high-end analog input module is designed to support all high quality analog sources, and includes a dedicated input with RIAA compensation. The module holds four analog inputs – 1 phono (RIAA, MM), 2 RCA unbalanced inputs and 1 XLR balanced inputs. You can increase the sensitivity of each input by up to 24 dB, of which the first 6 dB gain is handled through gold plated relays in order to fully utilize the head room of the analog-to-digital converter.

High-end analog input module (1 Phono (MM), 3 analog Line inputs)

Close up of the RoomPerfect logo

Perfect sound through RoomPerfect™

One of the world’s most sophisticated solutions for adapting the loudspeakers to the room

Read more about RoomPerfect™ here.

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