DSPeaker: automatic room correction


Each room has its own acoustic characteristics that influence the sound of your audio system. A movie theater has duller acoustics than a room with bay windows and tiled flooring. How can you correct the acoustics of your room without covering it with carpets and acoustic panels? With its Anti-Mode range, the Finnish brand DSPeaker may have a solution for you.

Designing a Hi-Fi and Home Theater room

What is a mode?

DSPeaker is a brand that makes anti-mode filters, hence the name of their devices. In acoustics, a mode is a collection of resonances specific to a room. Engineers speak of standing waves and neophytes of frequencies that move through a room. These filters are designed to prevent modes from existing. Powerful filters, called equalizers, strongly attenuate the frequency on which the mode is located. These standing waves can really impact the listening experience in a room, or even completely ruin the audio message.

How to choose your speakers?

Low frequency modes are arguably the most problematic. They can result in “boomy” or imprecise bass reproduction. This is due to the acoustic principle that the lower the frequencies, the more omnidirectional they are. This is the reason why the DSPeaker brand entered the market a few years ago with its DSPeaker 8033 model dedicated to low frequencies. These modes may be the reason why your subwoofer sounds very different from your friend’s who has the same model, for example. If you have space and acoustic constraints, filters are a good solution.

All about subwoofers

Managing modes with DSPeaker

Since bass is the main source of problematic modes in rooms, the DSPeaker 8033 and 8033s-II models are, not surprisingly, the most used. The DSPeaker models dedicated to bass are placed between the amp and the speakers. The DSPeaker Anti-mode 2.0 Dual Core, Anti-Mode X2 and Anti-Mode X4 models are placed between the source and the amp. The measuring microphone (included in each device) is then placed at the listening position and at the same height as the listener’s ears. Then, the calibration procedure is launched, during which the DSPeaker device will send frequencies to test the acoustic environment. After automatically determining the resonant frequencies of the room, the DSP corrects the equalizer curve. Then all you have to do is enjoy the more accurate sound. DSPeaker equalizers offer additional manual corrections accessible via an app for even more precise control of the frequency response curve.

Why use a subwoofer in Hi-Fi and home theater?

Which DSPeaker model should you choose?

DSPeaker 8033 and 8033s-II

Low frequency modes are the most common and bothersome. The Finnish brand allows you to reduce them with the DSPeaker 8033 Cinema for a single subwoofer and DSPeaker 8033s-II for two subwoofers. The first products to come out of the DSPeaker factories, they are active equalizers dedicated to low frequencies. They allow you to rediscover the punch and precision that your room attenuates or transforms. Without turning your small subwoofer into a bass behemoth, it ensures that it offers its best performance in your room.

The DSPeaker 8033-SII and 8033 are designed for subwoofers. Very easy to use, they allow to considerably improve the audio message at the low end of the spectrum.

DSPeaker Anti-Mode X2

The DSPeaker Anti-Mode X2 crossover offers an even more complete solution for calibrating subwoofers and speakers. After acoustic calibration of all frequencies, the DSPeaker Anti-Mode X2 filter offers a number of settings to personalize the listening experience. Placed between the source and the amp, it has a stereo RCA input, a stereo RCA output and a dedicated output for a subwoofer. You can adjust the bass, midrange and treble levels and save up to three different sound profiles. When the DSPeaker Anti-Mode X2 system is used with a subwoofer, it improves the filtering between the speakers and the subwoofer. As a result, it also improves frequency separation and transient reproduction.

Rear panel of the DSPeaker Anti-Mode X2
With its analog and three digital inputs, the DSPeaker Anti-Mode X2 calibration system can be easily combined with all your sources.

Anti-Mode 2.0 Dual Core

The DSPeaker Anti-Mode 2.0 Dual Core is an active filter that will act on all frequencies of a stereo source. It differs from the previous model by more powerful and sophisticated 40-bit processing. Equipped with SPDIF digital connectors as well as XLR and RCA analog connectors, it can be connected to any type of audio equipment. Thanks to the included remote control and its range of connectors, it can also be used as a DAC or preamp. The installation is done in the same way as the other models: the microphone is connected to the device then placed at the same height as the listener’s ears before launching the calibration procedure. It couldn’t be simpler.

In this enhanced version of the DSPeaker X2, the DSPeaker Anti-Mode 2.0 Dual Core can receive audio signals via four types of connections: XLR, RCA, toslink optical digital and mini-USB.

Anti-Mode X4

The DSPeaker Anti-Mode X4 supports one pair of speakers and one pair of subwoofers. It is also designed like a classic stereo hi-fi preamp, with a built-in headphone amp and DAC. It combines analog and digital inputs and outputs that are associated with several DACs and ADCs to achieve 100% digital sound processing. A USB-B input allows you to connect a computer and is compatible with HD and DSD audio streams. Finally, its is available in elegant silver or black finishes to match the rest of your equipment.

Rear panel of the DSPeaker Anti-Mode X4
Flagship of the Finnish brand, the DSPeaker Antimode X4 preamplifier and equalizer optimizes the frequency response of two speakers and two subwoofers.

A Bluetooth app for all DSPeaker models

Control and manage your Anti-Mode device using your tablet or smartphone. The DSPeaker Bluetooth mobile app can be an alternative to the infrared remote control, but it also offers additional features and ease of use. Quick adjustments for volume, sources and sound profiles are among the available settings. Other features include frequency adjustment, response graph display, input naming, profile import/export (e.g. saving a sound profile), etc.

DSPeaker: powerful equalization for everyone

The use of microphones and measuring devices to calculate the modes of the parts has always involved a significant cost. The results of these measurements may require building work or the addition of acoustic panels. DSPeaker offers a simple solution to automatically reconfigure the frequency response curve of rooms without professional help. The app also offers manual adjustment, rounding off a well designed product.

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