Reddit mentions of Sony SACS9 10-Inch Active Subwoofer,Black

That's a 5.1 setup, the receiver outputs a coaxial digital RCA plug directly to the subwoofer, so you just put the sub right next to the receiver. thats the ".1" part. you also buy a bunch of "bannana plugs" to make 5 cables that go from the positive and negative of each of the 5 outputs of the receiver to each pair of outputs on the wall. without more info, I'd just say buy this, it comes with the wire, plugs, and receiver. if you can tell us more about what size room, and what kind of speakers you have (you'll need to use a bent paperclip stuck through the holes in the grill to pull the metal grills off the speakers, don't worry, you won't hurt them) I might tell you to get a better quality system so you aren't wasting time with a low powered receiver, but honestly, if you don't know, you will never notice a difference and that's beautiful! you will only use 10 of the 12 included bannana plugs, and only for the wall, the rest of the connections will be direct stripped wire into the receiver. this willt ake some wire stripers and practice if you've never done it, watch a youtube video about it.

https://www.amazon.com/Sony-STRDH590-multi-channel-Receiver-Bluetooth/dp/B07JGFM616/ref=pd_cp_23_2/132-0038274-5893769?_encoding=UTF8&pd_rd_i=B078WG7HZY&pd_rd_r=b86f913a-17f2-4ede-94aa-d70bda909e11&pd_rd_w=XoV6b&pd_rd_wg=scFt2&pf_rd_p=0e5324e1-c848-4872-bbd5-5be6baedf80e&pf_rd_r=HCY5TKVSNZXK4D54KN61&refRID=HCY5TKVSNZXK4D54KN61&th=1

Then, you'll need a subwoofer to go with this, and same story, without knowing more I'm gonna tell you to buy this, because it's the best price, and you won't notice a difference until you have a second sub to check the quality against. If all of your speakers are mounted on the ceiling, I'd say just buy one sub, but if they are mounted like, 8 feet apart on the wall, with the TV centered between them, and you have space on the floor, you could buy two and place each one under the right and left front speakers. Not necessary and people will jump in and say "But subwoofers are non directionsallll" bullshit. 2 subs sounds better than 1 in most rooms for reasons I don't want to explain right now, but it's only an extra $80, and you just bought a house. Treat yo self. But then again, maybe just buy one, and later, upgrade the receiver to a $400-600 version with higher wattage output and a better sub for like $400. no need to clutter your space when something is better than nothing. https://www.amazon.com/Sony-SACS9-10-Inch-Active-Subwoofer/dp/B00O8YLIY6/ref=sr_1_5?keywords=subwoofer&qid=1575001825&s=electronics&smid=ATVPDKIKX0DER&sr=1-5

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you will also need a cable to hook the sub to the receiver. buy the shortest length you need just for cost and saving the uglyness of extra wires laying all around the place. https://www.amazon.com/dp/B01D5H8UTW/ref=twister_B01LYNSL5S?_encoding=UTF8&psc=1

Thanks! So most new AVR's have a builtin DAC, correct?
With the X7 I have two Sony SSHA1 (https://www.amazon.com/Sony-SSHA1-B-Speaker-System/dp/B00IWQPTDC) and a Sony Sony SA-CS9 sub (https://www.amazon.com/Sony-SACS9-10-Inch-Active-Subwoofer/dp/B00O8YLIY6).

The other 2 passive speakers I wanted to hook up are Sony SSHA3 (https://www.amazon.com/Sony-SSHA3-S-Speaker-System/dp/B00IWQPTAU/ref=sr_1_1?s=electronics&ie=UTF8&qid=1504538719&sr=1-1&keywords=sony+SSHA3).

Thoughts?

I hope you don't take this the wrong way but like a lot of NFL teams, you need help everywhere. Okay, so you have a basic 2.0 setup for a TT and bluetooth. There are several ways to go with this lets outline them and talk though them then you can decide. These are not in any kind of order just a list. I'm not an active guy so my recommendations will passive.

AMP

1. AVR - Sony STDH590 $180 - Ok it's over budget I get it but you're getting a new AVR for under two bills. This gets you more power, remote, auto setup, tone controls, digital inputs (expansion), xover for mains, sub out and multi-channel expandability. Whew...major upgrade over the little amp you currently have. Adjust the crap out of the tone controls to get the most out of the mains you have. This sets you up well for the future.
   
2. AMP - SMSL AD18 $120 - Anther amp upgrade that gets you many but not all of the features above. If you need a smaller form factor and don't want to expand into a surround/HT setup this could be your guy.
   
   Speakers
   
   
3. BIC DV62 $120 - These are about the same size as the speakers you have but will go much lower to get the bass that you're currently missing. If you're going to stay with a 2.0 then I would consider these.
   
4. Dayton T652 AIR $135 - Tower versions with an upgraded tweeter to the ones that you have. These reach down a good bit lower than the ones you have but not as low as the BIC ones above. They are also towers so there's there.
   
5. Polk T50 $80 ea/160 - Over budget but they do go the lowest of all the speakers, they are towers so again make sure you have room. The use of the radiators makes placement more forgiving vs a rear port that will need more room off the wall.
   
6. Sony SSCS5 $80 - Books that don't go as low as the BICs but they do get good reviews for being budget speakers. * You could pair these with the Sony sub on sale for $100 to get a 2.1 going for just more than you're budget.
   
7. Polk S15 $165 - Medium sized books that go lower than what you have currently have. These probably sound the best to me and look better than the rest.
   
   Subs - If you wanted to go to a 2.1 setup with your current speakers.
   
   
8. Sony SACS9 $100 - Ok it's not going to be great but it's in budget and has speaker level inputs. It would give you a low end that you're missing with the current speakers.
   
9. Dayton Sub 1000 $120 - This is the 10" version but any version will add to the low end that the current speakers are not giving you. Speaker level inputs will work for you current setup.
   
   Full upgrade - SMSL AD13 $75 and the Sony SSCS5 $75 puts you at budget but with a better amp (not as good as the above ones) and better speakers.

https://www.amazon.com/dp/B00CZESIRQ/ref=twister_B01N9D5674?_encoding=UTF8&psc=1

https://www.amazon.com/Sony-SACS9-10-Inch-Active-Subwoofer/dp/B00O8YLIY6/ref=sr_1_26?keywords=Theater+solutions+sub&qid=1558480228&s=electronics&sr=1-26

https://www.amazon.com/Monoprice-10-Inch-Powered-Multimedia-Subwoofer/dp/B00TZBBZV8/ref=sr_1_2_sspa?keywords=studio+subwoofer&qid=1558480319&s=electronics&sr=1-2-spons&psc=1

https://www.amazon.com/Rockville-APM10W-Powered-Subwoofer-Reference/dp/B01DN419Q8/ref=sr_1_15_sspa?keywords=studio+subwoofer&qid=1558480363&s=electronics&sr=1-15-spons&psc=1

https://www.amazon.com/Behringer-K10S-BEHRINGER-NEKKST/dp/B00ZR77FVI/ref=sr_1_1?keywords=behringer+studio+subwoofer&qid=1558480468&s=electronics&sr=1-1-catcorr

I'm guessing this is a tractor trailer?

The Sony SSCS5 on sale are really good for $73.

There is also a matching subwoofer for $98

So these? Can you tell me a little about the wattage and how it works with the receiver? If I wanted a larger speaker (like this https://www.amazon.com/dp/B07147TBD5/ref=sspa_dk_detail_4?psc=1) how would I know if its compatible with the receiver? I know the cabling would work but how can I ensure the receiver is able to power it? Just by looking at the wattage between the two?

https://www.amazon.com/Sony-SSCS5-3-Driver-Bookshelf-Speaker/dp/B00O8YLMVA

https://www.amazon.com/Sony-SSCS8-3-Driver-Channel-Speaker/dp/B00O8YLNRS/ref=pd_bxgy_23_img_2?_encoding=UTF8&psc=1&refRID=8027ED8V7NDZ2CRQV4RQ

https://www.amazon.com/Sony-SACS9-10-Inch-Active-Subwoofer/dp/B00O8YLIY6/ref=pd_bxgy_23_img_3?_encoding=UTF8&psc=1&refRID=8027ED8V7NDZ2CRQV4RQ