Down-firing subs and downstairs neighbors

First question, how much insulation will be between your floor and your neighbor's ceiling (if it's none, which is probable the case, you asking for trouble, by putting in a subwoofer)? Second question, how loud to you like to listen to your music and at what time of day? Probably the biggest problem will the bass from your subwoofers bleeding into your neighbor's apartment, and it really doesn't matter whether the subwoofer is down-firing or forward-firing. And there is "no way" to stop this "sound bleed" unless you're willing to pull up your flooring and acoustically isolate and/or dampen the space between your floor and your neighbor's ceiling. If I was me living in such a situation, I would stick with stand-mounted monitors, and wait until I had a place where I could use a sub-woofer without bothering the neighbors. Other than that, once you get moved in, I would borrow a sub-woofer and test your system to see how much bass "sound bleed" goes into your downstair neighbor's apartment and what THEIR tolerance level might be. Remember if YOUR MUSIC is bleeding into their apartment, it's your responsibily to solve the problem.

PS: You signed the lease on the place, yet?

1. Subwoofer placement. (stay away from the corners. Try mid-front or mid-side wall). The goal is to get the smoothest respond without boominess and overloading the room.

2. Use of bass traps in all corners and sub_base like the one Auralex sells.

3. Seal all cracks, gaps etc. Use exp.foam to fill the outlet boxes, use caps to cover unused outlets. Get heavy carpet with extra thick padding.

4. Set you sub low to pickup only the lowest frequencies. Lower volume if nessesary.

Or, find another place that is more suitable for this hobby.

Full range speakers won't get you anywere. Low bass is not directional. Monitors might be a better choice for you. Use sub for referance listing sessions and turn it off for late hour listining.

Neighbors will kill you.

My advice is to hold off on the downward firing subwoofers.

Until you downstairs neighbors do something to piss you off.

Then buy two of them!

:-)