KEF Ventura 4 Outdoor Speakers $330.00 KEF Ventura 4 Outdoor Speakers. The KEF Ventura 4 outdoor speaker is Weatherproof, IP65 certified and salt spray tested, marine quality. Ventura 4 is the smallest of 3 models, all of which can flood your pool, garden or yacht with high quality sound, even in the most extreme atmospheric conditions. It utilizes a 4.5” woofer and 1” tweeter and can handle up to 80W. Brackets included. Available in White only. Weight: 5.3 lbs each. Dimensions HxWxD: 9 x 6.75 x 6.8”. Dimensions with Bracket HxWxD: 9.25 x 6.75 x 8”. Price: $330/pair.