The new HELVIA ONDA-B series delivers powerful, full-bodied bass from an extremely compact footprint, thanks to a remarkably clever engineering solution. Here's why.
Traditional open-back ceiling speakers, lacking a sealed rear enclosure, rely on the air volume inside the ceiling cavity to act as an acoustic chamber. This approach makes sound performance, especially low-frequency extension and control, highly dependent on unpredictable variables such as ceiling cavity volume, construction materials and insulation.
To overcome this limitation, the new HELVIA ONDA-B series features a specially engineered cabinet with a high-density molded plastic rear enclosure working in perfect synergy with one or more front-mounted bass-reflex ports.
From an electroacoustic standpoint, this configuration transforms the loudspeaker into a true tuned enclosure system. The first advantage is structural independence: by eliminating rear sound dispersion, unwanted resonances and the influence of the ceiling cavity are effectively removed. At the same time, the front bass-reflex loading maximizes efficiency in the low-mid frequency range, delivering a sound that is noticeably richer, warmer and deeper than traditional open-back models such as the GALA series.
