The SB-4000 (see image) comes with a front-firing port. This makes it easier to place and gives it a lot more power and deeper bass.
Looking for a high-quality subwoofer for your home theater system and indulging a bit, but not too much with your budget? The SVS SB-3000 and SB-4000 are a couple of speakers you might want to check out. CAUTION: Even though availing high-quality sound is not an issue here, they are aimed at a consumer-level demographic (home theater system owners). Not critical listening. So for all you music producers looking for more bass response in their studio, we suggest you have a look at the KRKS8.4 or Yamaha HS8 instead.
In summary, both the SVS SB-3000 and SVS SB-4000 bring great value to the table. The build quality and design live up to the high level of quality for those familiar with SVS products. Both offer an excellent sound that works equally well for music and movies. Despite the powerful bass response, they are very compact and clean in the delivery of the same. The app you can use on your phone to control settings is a great feature, but its user-friendliness is not its strongest feature. The SVS SB-3000 is the less expensive of the two. If you need more power for a larger room and would want a couple of more connectivity options, the SVS SB-4000 is the right choice for you. If you need something more compact that fits easily into your room, the SVS SB-3000 is the one to go with.
Let me tell you something right off the bat.
The sound quality performance you'll end up getting from a speaker will always depend on your room acoustics - particularly room dimensions and speaker positions.
The impact of the combination of these two is actually so strong that in most cases, it doesn't even make sense to utter a single word on sound quality without speaking of them.
This is also why it's not unusual to see completely different reviews of the same speaker.
In one case the speaker might be placed in a sweet spot inside the room and hence the user might be satisfied. In other cases the same speaker might be ill placed and hence user might even have returned it.
The point most people miss here is that it mostly isn't even about the engineering behind the speaker itself. It's about where you place the speaker inside which room.
So, in order to solve this problem, I've partnered with Acoustics and Audio Engineering PhD Andrea Cicero from AC Acustica and created Soundton - a simple, 2D, browser accessible online speaker placement calculator.
With Soundton, now there's a way to figure the sound quality of most speakers before you buy them.
Read more about its working principles at soundton.com/documentation/.
The end colormap provides you the locations with the best (green) and worst (red) acoustics.