These subwoofer enclosures are available in varied designs, such as bass reflex design that includes a vent or a port, a subwoofer with a variable number of passive radiator
speakers in the cabinet, acoustic suspension with a sealed cabinet, horn loaded, infinite baffle, and band-pass designs that represent innovative trade-offs with regards to low frequency ranges, efficiency, subwoofer enclosure prices and sizes.
Features: Full Range Active Drivers, 2 x Passive Radiator
, 8h Playtime, Waterproof / Dust Resistant (IP67), Integrated Mic for Use as Speaker Phone, Designed to Float, Fits In Most Cup Holders and Bottle Cages
A solid 15W version with two drivers and sub, and a streamlined 10W version with passive radiator
The skateboard, designed in collaboration with audio startup Boombotix, features an integrated Bluetooth speaker with 50mm driver and passive radiator
, so riders can actually feel the bass thump underfoot.
Gear4 Soundwave This modern, clean-cut, soft-touch Bluetooth speaker packs a powerful sonic punch thanks to twin speakers with passive radiator
for increased bass, perfect for listening to music indoors or outdoors.
A USB connector even turns the Life Jacket into a charger for any smartphone or device with or without AC power--and, because it's from Altec Lansing, the Life Jacket packs an audio punch with aptX CD-quality audio and dual 2.5-inch Neodymium drivers with passive radiator
. Here's a bonus: pair the Life Jacket with any Apple Android or BlackBerry phone and it doubles as a speaker phone, with an onboard microphone for clear hands-free calls and spoken-caller ID that makes it easy to accept, reject, and terminate calls with voice commands.
Big Blue and Big Blue Live feature dual stereo speakers, open-air down-firing sub-woofer and rear-firing passive radiator
:Three passive radiators
make surprisingly deep and warm bass for the compact-sized speaker.
To complement its superior picture, the FZ1000 OLED Series boasts an upgraded Dynamic Blade Speaker, which now has 40 percent volume increase, with no less than eight multiple speaker units - four larger woofers, four squawkers and two tweeters, plus a quad passive radiator
to boost bass.
The PJ9 also features Dual Passive Radiator
technology to reproduce flush mid-range tones and crisp highs.
2" peak-to-peak), and a 15" passive radiator
at the rear of the cabinet.