These T15's are reasonably priced, passive bookshelf speakers from the American company Polk.
These speakers produce a smooth and natural sound that makes them great for general listening to a wide variety of music genres. Highs are clear and detailed, and while the bass is nothing to write home about, the bass output is adequate and can make music and movies sound really enjoyable. These speakers also sport a classic and elegant design which makes them very easy to match with existing audio setups or home theater gear.
Pro Produces a warm and smooth sound with clear highs and ample bass
These speakers are capable of producing clear sound in both high and low frequencies, even at high volumes. The highs do not sound too harsh and the bass, while not very powerful, comes with just the right level of punch. These speakers are great for small to medium sized rooms. Each speaker comes with 1 dynamic balance polymer woofer and a tweeter, both of which gives airy highs and a good amount of bass.
Pro Can be set up easily
You do not need to do a lot of searching for speaker pairs as each T15 purchase already comes with both speakers. There are the standard positive and negative terminals at the back of each speaker to connect speaker wires to; no special connections are required.
Con You will need to buy your own speaker wires as these are not included in the box
You may experience some hassle during setup as these speakers do not come with their own connecting wires. You will have to purchase them separately, or use compatible speaker wires that you may already have.
Con These are passive speakers so they require a separate amp
These speakers will not work properly when connected directly to your computer, mobile phones, or similar line-level devices. These require a separate speaker amp or need to be hooked up to an audio receiver in order for them to be powered properly.