The JBL warranty on electronic components remains in effect for one year from the date of purchase while the warranty protection for loudspeakers remains in effect five years from the date of purchase. Multimedia products and Headphones are covered for 1 year from date of purchase. Warranty protection is contingent upon your JBL product being purchased within the continental United States, Alaska or Hawaii from a dealer who was authorized by the JBL manufacturer to sell such products at the time of purchase. For more information on JBL’s product warranty, see our warranty policies here. If you created a JBL account and register your product you will be able to monitor the status of your products warranty.
You can purchase an RCA to 3.5mm mini adaptor cable at most local electronics retailers.
This speaker is shielded, and does fall within shielding specs. However, many times, because the speaker is large, as it is being placed on top of a TV, it will cause some distortion. There are a few ways to deal with this. First move it around slightly until you get the least amount of distortion. Now (if you have a newer TV), simply turn the TV off, unplug it for a minute or two, and then turn it back on. Most newer TV's have a demagnetizing process that happens when you first turn it on. This should get rid of the distortion. If it does not, look in the TV display or menu for a demagnetizing feature. If it does not have a demagnetizer, you may have to purchase a demagnetizer (available at most electronic stores) to demag your screen.
The fact is, you can put it anywhere because you won't be able to detect where the low frequencies are coming from. However, if the sub is placed in the wrong spot, it is feasible that you will not be able to hear it. This is due to something called "standing waves". The sound of the bass will bounce off the wall and come back to you. Of course, the direct sound will come to you as well. If these two sounds are out of phase with each other, you will not be able to hear the bass. In general, it is recommended that the subwoofer is placed somewhere along the front wall with your front speakers. Finding the best placement is usually a matter of trial and error. Simply try placing the sub in a few areas, and stick with the one that sounds the best to you when you are sitting in the general listening area. Placing it in a corner is often times the most effective spot.