PSI Audio LFE Module makes Sub A225-M subwoofer perfect for immersive audio setups

PSI Audio introduces the LFE Module, an optional enhancement for the PSI Audio Sub A225-M subwoofer. This new module allows the Sub A225-M to act as an LFE speaker in immersive and surround setups, meeting Dolby Atmos requirements. The LFE input and the normal subwoofer inputs can be used simultaneously. With the new LFE Module, the Sub A225-M by PSI Audio becomes the perfect LFE speaker for immersive audio in professional studios and discerning home cinema applications.

The contents of this press release

  • PSI Audio introduces immersive enhancement module for Sub A225-M
  • Fit for full immersion: the new LFE Module
  • Power and control: Sub A225-M
  • Low-frequency effects meet low-frequency extension
  • Immersive sound with Swiss precision and manufacture quality
  • Availability and price

Yverdon-les-Bains, 14th December 2022 – Immersive audio is capturing the world, and PSI Audio is a central part of it, with many studios around the globe relying on the Swiss precision studio monitors. With a new optional module, the already popular Sub A225-M subwoofer can be turned into a proper LFE speaker – in concordance with Dolby Atmos standards.

Fit for full immersion: the new LFE Module

Subwoofers are not a new topic for PSI Audio, as A125-M and A225-M have been available for years. However, in immersive setups, the LFE channel has special requirements. With a new add-on module for the Sub A225-M, PSI Audio can now fully support immersive audio environments. For all Sub A225-M built from September 2022, the LFE Module can simply be installed in place of the blank panel on the speaker. For older versions, an upgrade is possible but does require modification by the specialists at PSI Audio. With a frequency range of 24 to 160 Hz and output levels adjustable from -10 dB to +10 dB, the Sub A225M with the LFE Module is the perfect low-frequency companion for Dolby Atmos and other immersive formats.

Power and control: Sub A225-M

One thing that remains unchanged by the LFE Module is the acoustic performance of the Sub A225-M. Low-frequency playback is more than just moving a lot of air; it is about capturing fine details down to the fundamental frequencies. Especially in immersive setups, a crisp and tight low end is paramount, as it is all about spatiality, sound location and imaging to create that effect of immersion. PSI Audio excels at reproducing the low spectrum. The flat frequency response and linear phase response recreate a very natural sound stage – just what you want in an immersive setup. The Sub A225-M with its LFE Module can add range and power to the bass, but its main focus is to bring out the low frequencies more transparently, to convey all the information in the bass spectrum with the precision and fidelity that you would expect of a studio monitor – especially one from PSI Audio. The Sub A225-M delivers a robust low end that still shows all the contour and delicate detail of the signal, and with the new LFE Module it complies with Dolby Atmos LFE requirements.

Low-frequency effects meet low-frequency extension

There are two popular explications of the acronym LFE: “low-frequency effects” and “low-frequency extension”. While these two terms seem very similar at first, they are indeed quite different in their function: the extension enhances a number of other speakers in the bass spectrum, essentially being fed by the same signal. “Low-frequency effects”, on the other hand, suggests an independent channel that receives its own signal and is separate from what is happening on the other speakers. In immersive setups, this effects application is the actual role of the subwoofer, as a full-range spectrum is assumed for the other speakers. Considering the outstanding sound quality of the Sub A225-M, however, it would be understandable if people wanted to use it both for the effects channel and as an extension of the low range of the other speakers which is why both is possible simultaneously. Connecting a source to the LFE input on the LFE Module does not shut off the normal subwoofer input.

Immersive sound with Swiss precision and manufacture quality

Like all other products from PSI Audio, the Sub A225-M and the new LFE Module were developed and are manufactured in the company’s own workshop in Switzerland. With carefully selected and matched components assembled and soldered by hand, and measured throughout the various stages of manufacturing, PSI Audio products are built to the highest quality standards. Every step of the process is in the hands of experienced specialists, guaranteeing the outstanding quality and longevity PSI Audio is famous for.

Availability and compatibility

The LFE Module is available immediately and can be installed in all Sub A225-M models built from September 2022. For older models, please get in touch with the manufacturer or your local representative.

About PSI Audio

For 45 years, Swiss company Relec SA manufactures high- quality systems for professional audio reproduction. The company’s brand PSI Audio is firmly established in the field of studio speakers. The brand’s philosophy: 100 percent analogue circuitry without DSP, top quality through manufacturing in the company’s own facilities – and absolutely accurate reproduction. PSI Audio speakers play exactly what is present in the music, not adding anything to it or leaving anything out. With its active bass trap AVAA C20, PSI Audio also revolutionizes room acoustics.