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Optimize your stereo system with

Anti-Mode X4


Automatic calibration process improves the clarity and detail of your stereo speakers. Connect one or two subwoofers for extended bass with seamless integration and zero acoustic problems.

  • Versatile connectivity, connect up to 10 digital and analog audio sources

  • Supports up to 4 subwoofers (in "0.4" configuration)

  • Built-in headphone amplifier, including optional DSP auralization

  • Patented automatic THD optimizing digital crossover

  • Plug and play: no expertise required to calibrate and use

Speaker-room interaction is typically the most important performance-limiting factor of any high-end audio system. Every listening space introduces errors that can be in the magnitude of dozen decibels or even more. These errors are most pronounced at the bass and lower midrange regions, where the classic acoustic treatment loses its effectiveness.


DSPeaker Anti-Mode™ X4 combines an uncompromising selection of audio electronics with more than a decade of expertise in acoustics and signal processing. It was designed with one purpose in mind: to allow your loudspeakers to truly shine — in your home, in your unique acoustic environment.

The idea of the industry-leading automated Anti-Mode room calibration is simple: to make the loudspeakers and subwoofers work together with the room, instead of clashing against it. The benefits of the Anti-Mode correction include vastly improved clarity, tighter and deeper bass reproduction, the absence of unwanted "boominess", and a seamless integration of the main speakers and subwoofers.

The installation procedure is automated. Anyone can achieve superb results without any prior expertise or knowledge. After a brief calibration process Anti-Mode™ knows your listening space in great detail and designs custom filters tuned for your unique space. You may be very surprised to hear what your loudspeakers are truly capable of!

The Anti-Mode X4 covers a wide variety of use scenarios, ranging from the traditional "2.0" two-speaker configuration to more exotic installations featuring a number of subwoofers with multiple listening seat optimizations. The best cross-over frequency is automatically determined for speakers and subs.

In addition to the automatic correction, the user has full reign over extensive tone controls and custom filters. The preferred sound signature can be altered even in real-time, from the convenience of your listening seat. Different settings can be stored in memory for a quick recall at any time. Most functions can be accessed with the supplied full-aluminum remote or using the control wheel located at the front panel.

A modern, easy-to-use graphical user interface is provided. Room response graphs can be inspected in full detail without the need to resort to personal computers or other additional equipment. A built-in graphic design tool is included for all types of sound enhancements.

Three high-end stereo digital-to-analog converters (DACs) are driving the primary, auxiliary, and headphone outputs. Combined with output range control and picking the best converters using an IC tester, the XLR outputs reach 126 dB dynamic range and less than 0.0008% total harmonic distortion. Both primary and auxiliary outputs are active simultaneously for speakers and subs, available in both XLR and RCA. The signal of the primary output is also provided as optical and coaxial SPDIF.

The headphone output is available for night-time listening and when you don’t want to disturb your household or neighbors. Headphone mode features a proprietary auralization technique which can make many recordings sound more natural and reduce listening fatigue.


connections are plentiful

The two stereo RCA and one stereo XLR analog inputs provide SNR+THD of -104 dB. Whatever audio source you connect, the input range control selection allows you to gain full performance. Total of six SPDIF inputs and the USB Audio 2.0 input support up to 192kHz and DSD64 / DSD128 (on USB).

Power consumption in stand-by mode is mere 0.5W which helps saving both money and the environment.

You can choose between black/grey and silver/black enclosures to seamlessly integrate the Anti-Mode X4 into your home system.

Technical SpecificationS

DSP Cores

  • 1 x VS1205 (GUI & Firmware update USB)

  • 6 x VS1205 (Audio Inputs, processing)

  • 3 x High-Quality DAC (pre-selected), 3 x High-Quality ADC

Firmware Highlights

  • Anti-Mode 3.0 room calibration algorithm

  • Automatic cross-over frequency optimization (US Pat. 9,955,261)

  • Extensive tone controls and user-defined parametric equalizers

    • Anti-Mode 3.0 Multi-Rate (FIR & IIR)

    • House Curve, Linear-Phase Tilt, Parametric EQs

    • Adjustable Infrasonic

    • Adjustable cross-over


  • 2x stereo RCA, 1x stereo XLR input

  • 3x optical and 3x coaxial inputs (up to stereo 192kHz with coaxial)

  • USB Audio 2.0 input (192kHz PCM, DSD64 and DSD128 by DSD over PCM)

  • Primary Output: stereo RCA, stereo XLR, Optical Toslink, and Coaxial S/PDIF

  • Auxiliary Output: stereo RCA and stereo XLR

  • Microphone input, Headphone output

  • Control wheel with a button, IR Remote

Analog specifications (typical)

  • Primary XLR: Dynamic Range: 126 dB, Total Harmonic Distortion: < 0.0008%

  • Analog Input, XLR, SNR+THD: -104dB

  • Frequency Response: 5...45000Hz (20...20000Hz ±0.1dB)

  • Input Voltage max RCA: 2.5 / 4.4 / 6.2 Vrms, XLR: 2.6 / 5.2 / 12.4 Vrms

  • Output Voltage max RCA: 3.2 / 6.4 Vrms, XLR: 6.4 / 14.0 Vrms

  • Power consumption: 25W, stand-by: < 0.5W


  • Unit dimensions: 436mm x 70mm x 295mm

  • Unit weight: 4.5kg

  • Color options: Black or Silver front plate

  • Remote controller, calibration microphone, and microphone stand included


Image by Goh Rhy Yan


I'm happy to tell you that DSPeaker's Anti-Mode X4 is great just as it is, and will appeal to user needs that until now have not been addressed. This is a first-rate two-channel preamplifier with flexible bass management and potent DSP for setup and room EQ. It requires no additional parts or a computer— everything is already built-in or is supplied by DSPeaker. Even better, it requires no additional technical background


A single box, many fine talents


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