Tight bass sub recommendations

I like Rythmik's servo designs.  They have a wide range of models for different budgets and needs.  Two (or more) subs are usually better than one, but you can definitely improve your listening experience with a single sub.

@gdnrbob I wasn't referring to you specifically, just making a generalization.  I'm also a photographer, and the same thing happens when someone decides to take up that hobby.

Q "What camera should I buy?"

A "Nikon/Canon/Sony/etc. (whatever I own) is the best!"

Your response was more on point, mentioning a specific feature that might be of benefit to the OP's system. 

People get too caught up on brands in these kind of threads. 

I mentioned Rythmik, but I also have Power Sound Audio and SVS and have owned HSU and others.  There are a number of other brands I'd be happy to own.

What's more important is getting the right sub for your space and intended use.  Nobody has asked what your room volume is, what your placement options are, whether you also would like to use it for home theater, etc.  Those things should drive your purchase decisions more than what brand you buy.

All of the brands I've mentioned have people that are easy to get a hold of and are very knowledgeable.  Of course they will recommend their products, but once you get an idea of what size/type/output you need, then you can comparison shop.  These are all internet direct, but you can do the same with your local dealer. 

Get advice about what you need, not what brand someone thinks is "best".  It's almost always the one they bought, which may not be the "best" for your situation.