Originally Posted by hifi123
Hello fellow SVS people. As stated in my signature, you can see I already have 2 SB2000's in my system and enjoying these immensely. I posted in the thread a while ago when I added the 2nd unit to comment about how much more I am enjoying the setup with the dual 2000's over the single. I said it before and will say it again, the SB2000 is a fantastic sub, and recommend it highly; multiples ever better. The output is clean and punchy and really compliments my other speakers well. The SVS subs just blend in so nicely with the existing setup.
I am in the quest to get more output, but maintain the same quality of sound/effect that I have now. This is addictive, and I am happily addicted! I also got WAF to get a new SB4000, so just recently picked one up. I started out replacing one of the 2000's with the 4000 to see what improvement I would get, but to my shock, I am experiencing the opposite: I am getting less with the 4000. I know this does not make any sense... For testing purposes, I then moved the 4000 out from the front corner to the middle of the room, directly facing me, about 8 feet away. Still same thing... I put the 2000 beside it, and alternating between the 2 subs, I am getting more output from the 2000. The 4000 is working, but it just seems to be holding back. I am playing back scenes from movies/tv shows that I know very well and the 4000 is just not cutting it. For example, the opening theme song of Stranger Things, near the end with the heartbeat and the sustained rumble, the 2000 delivers but the 4000 seems to be half asleep...
I have the 4000 set to factory default (-10 volume), but I did try the movie and music presets, and also increased the sub volume to -5), but still not getting the output I am expecting. Of course this makes no sense, because the 4000 has a bigger driver, and a more powerful amp, so I suspect the unit I got is faulty. I am crushed, because the 4000 is a perfect size for my room and fits nicely, and also fits the budget. I keep hearing about the PB4000 and I think I might be able to convince my better half to get that (after sending back the SB). The PB is a much bigger box, so I would need to put this on the side wall beside a couch, instead of at the front corner of the room where the SB is now.
I thank you for reading this and appreciate any suggestions.
Congratulations on your journey to becoming a basshead!
Going from a single SB2000 to, potentially, a PB4000 means that you are well on your way. All kidding aside, that is what a lot of us have experienced. As we hear low-bass and start to feel bass tactile sensations in our listening rooms, we like that even more than we anticipated, and we want more of it.
My first thought is that you may be running the SB4000 with the same calibration/room EQ that you were running with your SB2000. Did you recalibrate with the new sub? If you did, then I think that you will need to contact SVS to go through some trouble-shooting on that sub. As you suggest, it may simply be defective.
Irrespective of whether or not the SB4000 is working properly, though, if you want to take the whole bass experience to another level, you can simply return it and get a PB4000 instead. The PB4000 (or the PC4000 cylinder version) will give you much
more low-bass SPL than the SB4000 will. The new models have updated qualities which make them slightly superior to the previous 13 Ultras, but the overall output is about the same. So, you can compare The PB13 and the SB13 on the following table to understand the max output differences between the two subs.
I mention that because if you are already thinking about the PB4000, then it is unlikely that you will stop thinking about it even if you get the SB4000 working properly. The best advice I know is to buy the most powerful subwoofer you can afford, and then add a partner to it if and when you can. That is particularly the case when you have reasons to believe that you will want to upgrade again. Based on your posts, you have reasons.
The following is a direct link to a buying guide for subwoofers. It includes some discussion of the differences between sealed and ported subs. I hope it helps!