Originally Posted by SouthernCA
I asked this question earlier but did not get a response from you or someone else from SVS.
I am am currently using one SVS NSD SB 12 and wondering if I should upgrade to another SB 1000 or SV2000. I don't listen loud and so volume is not a problem for me.
I have been wondering about this. NSD is frequently in sale at $399.
What is missing in SB 12 NSD that makes is so much less expensive than SB1000 or SB2000?
Is it the DSP quality or the power rating or the finish or is it something else?
What do we lose in sound quality in 12 NSD compared to these other more expensing SVS subs?
Should I upgrade to another SVS sub?
Ed was the right person to answer the question about the performance difference between the SB12-NSD and the SB2000. But, I thought it might be worth adding something to the discussion. I bolded a key sentence in your post for emphasis. If you only listen at very conservative volume levels, and if you only listen to music played by acoustic instruments, you might not notice much difference from a more powerful subwoofer, or from a pair of subwoofers.
As you know, multiple subwoofers not only add more SPL, they can also help to smooth the overall frequency response. Most people notice audibly better bass SQ when they go from single to dual subs, but placement is still important, and so is matching the subs as closely as possible.
If your sound system is used for other things than just listening to music played by acoustic instruments (which typically don't go very low in frequency) or if you just find yourself wanting more bass, then an upgrade could be helpful irrespective of your listening levels. That is because we don't hear low-frequencies as well as we hear those in our normal hearing range, so we may want to increase our bass volumes even when we are listening at very moderate volume levels.
In fact, we may need to increase our bass volumes even more than we might if we weren't listening at very moderate volume levels, since bass frequencies fall-out of our hearing range proportionately faster as overall volume levels drop. That is demonstrated by the Equal Loudness Contours. I know that you already know most, or all, of this. But, it is worth re-emphasizing because adding another sealed sub, to match the one you have, or moving-up to a better model, will give you more low-frequency extension. And, that will enable you to add more bass weight to your music if you want to (especially for electronic music) or to add more low-bass special effects for movies.
I think it is important to distinguish between listening at moderate volume levels, and having sufficient bass, because I think that they are entirely different things due to the way our hearing works. Adding a second SB12-NSD would give you slightly more low-frequency extension, if you increased the volume of your subwoofers. And, moving to a single subwoofer with a shallower roll-off, such as the SB2000, or even better, the SB3000, would do the same thing.
Just something to think about.