Tonewinner AT-300 AV Processor

Brand: Tonewinner


Tonewinner AT-300 custom preamp 9.3.4/7.3.6 Dolby Atmos processor

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AT-300 is a professional theater & music center integrated audio-video decoder for 9.3.4 setup. It’s developed and designed by engineers recognized by American THX company. It supports 4K decoding and is Dolby Atmos, DTS:X & HDMI2.0 certified. As a multi-functional processor, it can be used for houses, cinemas and theaters for immersive 3D Hi-Fi sound effect. As a top 10 audio brand in China, Tonewinner has 30+ years experience in designing and manufacturing acoustic products. As an original supplier, Tonewinner always warmly welcomes distributors, partners and customers around the world.

9.3.4/ 7.3.6 Decoder for Immersive Sound Effect

Tonewinner AT-300 AV Processor Spec


It will transport you with breakthrough, spatial & realistic audio experience and bring you a deeper connection to music & images.

Tonewinner AT-300 AV Processor Spec 1


Professional Chips for Professional Decoding

It adopts professional chips with high quality, great performance and functioning for stable decoding.

Tonewinner AT-300 AV Processor Chip


Video Processing

  • Panasonic MN864788 chip for HDMI inputs & outputs
  • Up to 32-bits input
  • RGB 4:4:4/YUV 4:4:4 color decoding
  • 3840×2160 4K/60Hz HD video format
  • OSD layer menu for consistent display during setting

Tonewinner AT-300 AV Processor Video Processing

DSP Digital Signal Processing

ADSP 21573, the 4th SHARC floating-point processor from Analog Devices, handles the decoding process of Dolby Atmos & DTS: X and the creation of virtual surround and wides.

Tonewinner AT-300 AV Processor DSP


Audio Processing

Two Cirrus Logic CS42528 audio processors and an ADSP 21573 floating-point processor work together to adjust the frequency response curve, timbre and sound effect, which ensure the separation of sound field and coherence of surround.

Tonewinner AT-300 AV Processor Audio Processing


4K for Life-like Vision

18 Gbps data transfer speeds and 3840×2160 4K video decoding bring better contrast and brightness. It also handles HDMI2.1, HDCP2.2 and is compatible with HDR series formats.

Tonewinner AT-300 AV Processor 4K


HDMI 6 in & 2 out & eARC

The eARC simplifies connectivity and provides greater ease of use for multiple components discovery and brings enhanced audio detail and depth.

Tonewinner AT-300 AV Processor HDMI 6


Original Easy Test EQ Room Calibration

Get into the EQ testing with the professional microphone ETM-2. The Mic will capture the sound information and transfer it to the amplifying part to automatically equalize parameters of each channel. Close balance of all channels will bring better sound effect.

  • Auto-measure of the distance between speakers and seating position.
  • Auto-adjustment of delay & sound pressure level.
  • Auto-calibration of speaker frequency response.
  • Compensation between full-range channel & bass.


Tonewinner AT-300 AV Processor Room Calibration


9.3.4/ 7.3.6
≥98dB(A weight, direct mode)
≤0.02% (1KHz,normal working)
Rated input impedance
20kΩ(analog input)
Rated output impedance
10Hz-50kHz (+1/-3dB, analog direct)
≥14dB (analog direct)
Channel separation
>80dB (analog direct)
Input level
≥2Vrms (analog direct)
Power vlotage
~100V-~240V (50Hz-60Hz)
Default volume range
The default volume range is 0-80. Actual gain mode: “-65-15” (-65 to + 15)
431x100x326mm (W×H×D)


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