A:AnswerNo, THEY ARE NOT WIRELESS - they DO require speaker-wire. If you want great wireless speakers (but they don't make in-ceiling speakers) - look into SONOS. We are an installing A/V dealer and install LOTS of brands of in-wall and in-ceiling speakers. We do not know of ANY ..... FLUSH-MOUNT in-ceiling or in-wall speakers that are WIRELESS. Even "wireless" speakers STILL NEED POWER as in PLUGGING-IN TO ELECTRICITY. (because of internal amplifiers) .... so you need ELECTRICITY to a "wireless speaker" but NO SPEAKER WIRE from the A/V receiver to each speaker. This is how WIRELESS SUBWOOFERS work with a soundbar - they PLUG INTO THE WALL for ELECTRICITY .... but DO NOT need speaker-wire.
A:AnswerYes at lease a foot away you never want to have lo voltage and high voltage close to each other . High voltage will distort sound and possible damage speakers
A:AnswerThe specs say 3.8", but I believe that includes the front part that stays outside the wall. They must be less than 3.5" because I have them in an interior wall framed with 2x4's.
A:AnswerThe speaker mounting will be very straight forward... If you're installing in standard drywall or other ridged ceiling type then no, brackets will not be necessary.
Once you cut the hole using the provided template, its as simple as placing the speaker in the opening and then tightening the (4) anchor screws. Each screw has an anchor 'foot' that swings out to catch the inside of the drywall. Prior to install, the included instructions recommend loosening each screw just slightly (reverse turn) to allow the anchor foot to easily swing outward once the speaker is in position. Be sure to support the speaker in your hand, flush with the ceiling until you feel all (4) feet holding it there for you... once all feet have made that initial contact with the inside of the drywall, be sure to torque the screws down evenly in the recommended cross-pattern. Do not over tighten. The instructions go over this pretty well and if you follow them (and have some base mechanical aptitude) it'll result in a clean installation.
For the real work (running the wire) 16 gauge would be the minimum as it's sufficient for this size/watt/ category of speaker.
If you're running wire under the house, in the walls and ceiling as I did, 16 gauge will also be easier to pull. I used "Mediabridge 16AWG 2-Conductor Speaker Wire (100 Feet, White) - 99.9% Oxygen Free Copper - ETL Listed & CL2 Rated for In-Wall Use" and a 16" long 3/8" installers drill bit. Best Buy has wire available, but didn't immediately have what I required on hand. Side note... The speaker binding terminals for these units are excellent (strong springs) and can easily accommodate larger wires so if it was me, and if I didn't have to run my wires though as many wall/ceilings/floors I'd use 14 gauge if it's available.
You've got this.
A:AnswerI believe it would would, but would advise against since they are not rated for outdoors. Wind may drive rain up under the eaves and cause damage. Even in a covered porch...humidity may take its toll.