I highly recommend the "slim" 8 inch subs by Monolith. They have 8,10 and 12 inch sizes you can slide under a sofa or wall mount. You can see the 12 inch (big) version mounted on my back wall if you look at my profile.
@resveratrol3 note that any smaller sub no matter how good may not be a good match to some speakers and/or room. If speakers are fuller range and not high pass filtered you probably need a larger sub to properly fill in the missing lowest octave. Also the larger the room the larger any sub up to the task properly will probably need to be. A smaller sub running with more full range speakers to start will be a challenge if even possible to blend in properly without merely delivering a big bass bump in the frequency range already covered. That could result in fat muddy bass that also obscures detail in the midrange which is not a good thing.
I concur that the SVS 3000 Micro deserves a look.
It combines two horizontally opposed 8" woofers in a compact, attractive package which i was able to fit under a buffet used as my stereo cabinet.
I bought one a few months ago and then added a second one more recently, which I think balances the bass in support of a pair of K-horns.
A mobile app is handy and I can attest that the current customer support is good.
Thank you all for your suggestions.
So based on the price range and the appearance, I have narrowed it to the following ( in approximate order of price, low to high):
Kanto Sub 8
Jamos S 808
RSL Speedwoofer 10s MKII
Any of these that I should specifically avoid? Any of these that punch above their weight in terms of sound quality?
The speakers that I have are supposed to be "quick" and hence I was looking for 8" in the first place.
I've been curious about using multiple subs for years so in the last year I've been buying cheap subs off ebay. There's a custom install only brand named Episode and I bought two of their 8 inch sealed subs and one sealed 10 inch model. I paid around $150 each for the 8 inchers including shipping. At that price they're great. They're reasonably flat to around 40hz where they drop off pretty quickly. Since it's a custom install only brand it looks like people don't have any idea how to price them so they can be found at great prices somewhat regularly. They look a lot like the PSB sub series and if you look at some pics the amps are clearly made by the same company.
Found in the outlet from the dropdown menu.
My 3000 Micro supposedly has a couple blemishes, I sure can't see them.
They are running about $750 though.
I have a Monitor Audio Bronze Sub sitting in a box right now. I'm not sure if it's an 8". Sounds really good. Lacks the mobile app adjustments the SVS has.
I could put it up for sale here if you're interested. (way under $500) 😊
+1 For the small B&W subs. I’m using two ASW608 8” subs. They are great subs. Good luck with your search. Check out my system page to get an idea of how they look.