from the manufacturer
four 1/2″ (11. 43cm) dynamic stability long-throw mineral-stuffed polypropylene cone driving force with butyl rubber surround pumps out unexpected bass response from a compact design.
three/four” (19mm) dynamic stability anodized aluminum dome tweeter with rubber surround and neodymium magnet for better strength handling and smoother response.
the precise fabric overall performance, casting off driving force and tweeter ‘artifacts’ for extra realistic sound duplicate at high and coffee extent levels.
polk audio all-climate overall performance, atrium collection speakers exceed baseline commercial and navy specs for environmental persistence (astm d5894-uv salt fog,
mil standard 810 immersion, mil-std 883 method 1009. Eight for salt and corrosion.)atrium audio system can resultseasily resist the worst mother nature can dish out, whether its extreme temps or heavy rains.
speed-lock mounting, the perfect, fastest and most secure of all mounting systems.
surely mount the bracket and click the speaker into place. Goal it and tighten it down.
large insurance baffle layout fills a large open out of doors area with massive, complete-variety sound.
the atrium 4 has a greater steeply-angled baffle layout that maximizes vital mid- and excessive-frequency dispersion over a big area, without sacrificing detail.
gold-plated 5-way binding posts for the most comfy, reliable hookups.
aluminum grilles and bracket, with stainless-steel and brass hardware: no rust. Ever.