Amina Technologies Unveils Slot-Vented ALF120 Passive Subwoofer


Amina continue to expand their subwoofer range with the announcement of their highest performance model yet, the ALF120, which maintains ...

Amina continue to expand their subwoofer range with the announcement of their highest performance model yet, the ALF120, which maintains the company’s ethos of providing custom installers with “almost” invisible subwoofer solutions to complement their range of completely invisible in-wall and in-ceiling speakers. [caption id="attachment_7797" align="alignright" width="195"]Amina ALF120 Subwoofer Amina ALF120 Subwoofer[/caption] Amina have designed the ALF120 particularly with home cinemas in mind and also for large room, high sound pressure stereo systems where previously multiple ALF80 subwoofers would be required. The company realised that the ability for the product to be placed within standard wall cavities and vent discretely into the room at floor level would appeal greatly to custom installers. In order to achieve this, the Amina R&D team investigated various bass-optimised design topologies that would enable conventional subwoofer cone drive units to be incorporated within a very shallow cabinet design. This research led to the implementation of a unique distributed transmission line design which endows the product with high efficiency, deep and fast bass response and a narrow slot opening for the pressure waves to enter the room. Such designs are rarely seen in the market because they require a large, typically visually un-wieldy cabinet. However, the acoustic benefits are great and because the Amina ALF120 cabinet is not seen after installation it is the ideal solution. The ALF120 is 1.6m tall and will comfortably fit within standard 400mm stud-wall bays. Its slot vent is only 315x14mm and can be positioned behind a suitable matching slot created in the room’s skirting board. The slot vent itself is a unique metal plate design that allows the orientation of the port to be changed by 90 degrees allowing the subwoofer to be placed flat under sofas or built into joinery that cannot accommodate the product in an upright position. Performance-wise the fully passive ALF120 will, when powered by a suitable amplifier, generate low frequencies from 26Hz – 120Hz with typical in-room sound pressure levels of 111dB and even greater if corner loaded. These high sound pressure levels are achieved with very little power from the amplifier because the acoustic loading provided by the distributed transmission line is so efficient. Amina recommend that high quality power amplifiers with as little as 75Wrms (into 4 Ohm) are sufficient, giving installers and specifiers the added benefit of helping them design systems with smaller rack space requirements and lower energy consumption. The company will be officially launching the ALF120 at Integrated Systems Europe in Amsterdam from the 10 -12 February (Hall 1, P19). It will be displayed alongside their audio demonstration of the new AIW550i. To experience the performance of the ALF120, Amina are currently demonstrating it in their own 7.1 cinema system in Huntingdon. www.amina.co.uk