little mini theater room 13x13

In that case, then are you sure you would want to limit yourself to the location where the towers are with the bp8020 speakers? Then you have no choice for trying to optimize the sub bass in your room.

The optimal location for the towers may not be the best place for the subs in the towers to be.

your biggest issue is your room. a square room is the worst type of room for bass. I'm all about having 2 subs cuz I have 2 but in a room quite a bit bigger than yours. 2 subs in a room that small would be crazy.

Are you looking for 2.1, 5.1 or 7.1 sound?

I have towers and love the way towers look and sound. But in all reality if you are running a sub or 2 and xover your speakers at 80hz you really just need speakers that have a -3db point lower than 80hz. However if you have the budget and room for towers by all means go for it, cuz I'm under the opinion that bookshelves really aren't that much cheaper than towers if you have to buy stands to put them on.

Not saying you should buy exactly what I have but I would take a look at the speakers and subs just to see what you think.
I have BIC Acoustech 2 - PL-89 towers, 1 - PL-28 center, and 4 - PL-66 surrounds and I have 2 - Outlaw Audio LFM-1 Plus subwoofers. I think the system sounds great and its hard to beat for the price. I paid under $2k for my 7.2 speakers and subs.

-3 db is a measure of loudness. +/-1 db is generally considered a noticeable change in volume; +/- 10db a doubling (or halving) of perceived volume. And we want speakers that have a smooth frequency response thoughout the listening range. If certain frequencies are up (+) over others, then they become more emphasized. Down, less emphasized.

All full range speakers eventually have a low frequency where they start to roll off, where they go down in sound output, to eventually produce no bass output. Here's a frequency response chart for a bookshelf speaker:



You can see where the lower frequencies start to loose output below around 80hz on the chart.

So in the previous post, -3db down means that the speakers are starting to roll off (decrease in volume) relative to higher frequencies at 80hz, which is your midbass. If your speakers have smooth output down to 80hz, then the sub takes over from there. Doesn't matter if the speakers drop in output below that. Generally, people don't want to have to set the crossover higher than 80hz because then the bass output becomes localizable--you can sometimes tell the bass is coming from the location of the sub.

Sensitivity is how much volume a speaker can put out for a given amount of wattage. So speakers that are a more sensitive need less power to get to the same volume as speakers that are less sensitive.

However, be wary of comparing frequency response measurements, maximum power output, and sensitivity too finely between speakers from different manufacturers. Sometimes manufacturers are a little misleading with their stated specifications. You have to look for reviews where the speakers have been independently tested to know for sure.

And sometimes they're totally off the wall. The only data you can trust is a measured SPL chart.

And AVS speaker designers who have access to Thiele/Small parameters and can model the speaker performance.

(too bad companies don't share that data)

There are only two reasons for not having SPL charts: they don't have them, or they don't want you to see them. My feeling has always been no chart = no sale. If everyone felt that way very few companies would still be in business.

Dealers don't usually that have information because manufacturers don't want to supply it. You have to hope that you can find a pro review online where someone has tested the speakers.

Since you are considering their speakers, Definitive Technology is one of the worst companies in the industry when it comes to listing specs that are misleading. No way you will get charts from them for their products (lol)

Their sub specs are intentionally misleading. For instance, the DT ProSub 800 has specs listed as 20 Hz - 150 Hz. It has been tested to be almost -28db down at 25hz from it's peak output

I don't have BIC Acoustech, I own some Ascend Acoustics, though. Two different speaker companies, but both only sold online.

You still might want to check out Ascend Acoustics speakers. Get their CMT-340 SE and the matching center, and you have three of the exact speaker across the front which is optimal for the front sound stage, with six 6.5" drivers firing at you

Then a pair of Ascend Acoustic HTM-200 SE or CBM-170 SE for the rear, and that would leave you enough for two Klipsch RW-12d. Your room would rock!

I think the BIC Acoustech speaker sets are very good for what they are: an entry level budget speaker that has high sensitivity; thus, they can play very loud. You have a small room. Doesn't seem like you need that kind of speaker sensitivity, and there are other speakers that can provide better SQ for your money.