Aiwa speaker system model no sx-wna909 2 sets of wires coming out speaker which is which

Refer this manual - https://www.manualowl.com/m/AIWA/CX-NA71/Manual/251664?page=26

Manuals Lib has the manual here: https://www.manualslib.com/products/Aiwa-Sx-Wna555-159268.html . You can download it or read it online. The speaker system has the model number SX-WNA555. The main part of the stereo system has the model number CX-NMA545.

I hope this helps.

Cindy Wells

You should be able to use any decent pair of speakers with an impedance between 8 Ohms and 16 Ohms and maximum power capability of at least 33 Watts. The link provided is for the specifications page of the owner's manual.
http://audio.manualsonline.com/manuals/mfg/aiwa/cxnhmt75.html?p=31

Since they're all passive speakers requiring amplification, you don't connect them directly to that TV.

It only has digital audio out and earphone analog audio. No amps or direct speaker connnections.

You might want to look at the manual for things like diagrams.

Yes, you can use them but be careful. These are not necessarily robust speakers. If they sound strained, back off.

http://www.retrevo.com/support/Aiwa-NSX-D22-manual/id/1076dj393/t/2/

Page 4:

1 Connect the front speakers.

Connect the right front speaker to the SPEAKERS R terminals and place it on the right side of the unit. Connect the left to the SPEAKERS L terminals and place it on the left side.The speaker cords with the white stripes go to the + terminals.

Go online, look up the Aiwa website, pull up the model.

Considering you only have 3 speakers, I would think you would be further ahead by purchasing an entirely new system.

This article explains the differences between Dolby 5.1 and Dolby 7.1 surround sound:
Home Theater Receiver Guide 5 1 vs 7 1 Which is Better

In terms of brands, I'd recommend finding a complete set up that's in the price range that you would like to spend.