The Polish manufacturer has introduced a new solution to the market to complement active studio monitors with a coaxial electro-acoustic transducer from the Norwegian SEAS, but it is also suitable for home use. The subwoofer in a closed-box (sealed) enclosures creates a 3-way system with the monitor, which works well with a traditional stereo. This solution provides excellent operating conditions for the coaxial transducer in a housing completely isolated from low tones. MORE: https://audiophilepc.blogspot.com/2023/ ... music.html
APS has already considered the use of active subwoofers and has to offer 10" (105 dB) and 12" (110 dB)
Published March 2015 by Hugh Robjohns https://www.soundonsound.com/reviews/aps-coax
Poland seems to be a hotbed of audio equipment production at the moment — I’ve lost count of how much new gear I’ve reviewed from Poland this year! Audio Pro Solutions (APS) were established in 2006 to build loudspeakers for both the hi-fi and pro-audio markets.
The Art Of Sound Perfection is the motto of Scandinavian Electro Acoustic Systems, which dates back to the late 1920s at the Norwegian Institute of Technology and has remained in the forefront of European driver manufacturers for more than 60 years.
Acoustic suspension (air suspension, closed box, sealed box) is a method of loudspeaker cabinet design and utilisation that uses one or more loudspeaker drivers mounted in a sealed box or cabinet. Acoustic suspension systems reduce bass distortion that can be caused by stiff motor suspensions in conventional loudspeakers. Speaker cabinets with acoustic suspension can provide well-controlled bass response, especially in comparison with an equivalently-sized speaker enclosure that has a bass reflex port or vent. The bass vent boosts low-frequency output, but with the tradeoff of introducing phase delay and accuracy problems in reproducing transient signals. Sealed boxes are generally less efficient than a bass-reflex cabinet for the same low-frequency cut-off and cabinet volume, so a sealed-box speaker cabinet will need more electrical power to deliver the same amount of acoustic low-frequency bass output.