Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What is the difference between the Polk Audio TL 1600 System and the Polk Audio TL 1900 System?
Document: The Polk TL 1600 Set works very well, filling our living room with the sound that I expected. They are attached to a 7.2 Yamaha system, adding two of my old EV 14 Speakers from over 30 years ago. Amazing sound.
I did a lot of research for some replacement speakers for my Aiwa receiver and the Polk TL 1600 kept rising to the top in the price range I was looking at. Wow! I didn't realize how bad my old speakers were until I upgrade to the Polk system. My old speakers were 3 different brands and my subwoofer was 20 years old. The sound from the TL 1600 is fantastic. When I watch a DVD I can hear a plane fly by or birds chirping in the back ground.
The system comes with four TL1 satellite speakersPolk Audio TL 1 Sat Speaker (Each, Black), a matched central speaker and a powered subwoofer. Setup is easy enough (some reviews of the TL1 systems complain about the cable posts but frankly I saw nothing that caused me any concerns - I was easily able to connect each speaker with Monster Xp-CI cable.
They are compatible with most universal mounts so expect to buy four mounts (one for each satellite). I don't know what the folks at Polk Audio were thinking by leaving the mount out but this seams to me to be penny wise and pound foolish (to quote an old English expression). That aside, the sound quality from this setup is nothing short of excellent. I'm powering the system from my old Yamaha RX-V2095 receiver which has excellent sound reproduction.
I paid around 550$ (a five-digit figure in my currency) for this 5.1 configuration in India and waited a month for the shipment to arrive, only to find that they are not worth the wait and money. Sorry Polk Audio, I don't see (i.e. hear) anything great with the dynamic balance / time lens / or whatever technologies you claim to put into these speakers. Are your claimed technologies mere marketing gimmickry with more hype than substance?
This is a great speaker system. Made a huge difference in our game/media room. Easy to set up as well.
This is a great sound system if you are looking for a full 5.1 setup (speakers only). I bought this for our game room so it's not our main a/v setup. I'm very fussy about the quality of my audio so I was a little wary about spending so little on speakers (the most important and most under-rated part of any a/v system.
I got it on a sale from another store and bought it without second thought. I was more inclined towards Klispch or Energy, but the price offered was very cheap compared to both. Currently I am using as surround sound speakers and it is not being the heart of the system( front speakers are Polk tsi400). Subwooofer is OK and for a second option I will go with PSW111 or higher.
Only the top line model in the seriesPolk Audio TL350 Black 5-Channel Home Theater System(relatively expensive) sports this specific tweeter.Subwoofer:+ Delivers okay bass, but volume should be set bit high.- Perceptible & boomy at high volumes.- Size seems to be bigger than the bass it delivers.Overall, don't expect house-shaking bass from this 50-watt Sub.
Very light( less than 2LB) for ceiling mount as it is one my requirement. Polk has done a good job in creating such light speakers with good sound.
Answer: looks like the sub-woofer is different in 1900 system while the satellites are the same