Originally Posted by BobZealand
I’m going to take advantage of the jtr no shipping cost this November and get another 2400 but I always out of curiosity thought how do two psa 1811 compare to two 2400 not that I’m even considering 1811 I just don’t see any comparisons anywhere and who’d like to know what I will have compare to a setup that is half the cost I know the jtr goes a lot lower extenstion and output is greater so far I really love my 2400 and am getting another one I know most will say that they do not compare but this is my only quality subwoofer I ever owned other than a typical $100 dollar subwoofer I had in the past so I have no idea what the other lower priced quality subwoofers sound like and was just curious to know.
Man, you are really lucky I tell ya.
Not many here have the opportunity to score JTR subs at 2 separate promos so closely to each other. I believe this is the first time that Jeff has offered Thanksgiving promo. When JTR offered promo, it has been new product launch, or clearance of certain models, which means limited to certain models only.
Anyhow. The PSA V1811 is a fine subwoofer for its size. It is geared towards living room friendly, or high WAF. That's why it has a 18" driver in the smallest cabinet possible. This means it has high port tune. In order to have a low port tune, a larger cabinet with long port is usually required. These two requirements will combine to make the cabinet even larger.
Hoffman’s Iron Laws of Speaker Building
1) Bass Extension
3) Small Enclosure
You can only have 2 of the 3.
The PSA V1811 has 2) great efficiency up top (it plays loud) and 3) Small enclosure. Therefore, it's extension is not as good as the other larger 18" subs tuned to 15~18Hz.
If you compared the V1811 with other 17Hz tuned 18" subs, you will find that the 17Hz tuned subs dig deeper. This means bass heavy scenes will sound more weighted. In my HT, bass > 20Hz rattles the drywall and windows. The ULF (below 20Hz) rumbles the ground. You can also try playing some ULF scenes with your Cap 2400's LF Adjust at different settings. By turning LF Adjust to minimum, the 2400 basically behaves like a higher tuned sub such as the V1811. Then turn the LF Adjust to the maximum, you will get 8dB more output @ 10Hz. Try it and see if you notice the difference.
Since bass below 20Hz will shake the ground more, the Cap 2400 also provides more TR than the V1811.
Another benefit of the lower tuned sub is related to the hot bass content we like to call chuffing-inducing scenes. Most of these scenes are centered around 17~20Hz. Chuff is excessive port noise causes by air coming out of the port. At port tuning frequency, the port is doing all the heavy lifting (producing the output). Therefore, if you play a hot 20Hz bass clip with a subwoofer tuned to 20Hz, most, if not all, of the output is produced by the port. At higher volume, it may sound bad. When you play the same bass clip with your 2400, the driver is still doing almost all of the heavy lifting since it is tuned to 10Hz. This means the same scene will sound better. This is a big deal and the reason many audiophile prefer sealed subs.
The PSA V1801 has 20~80Hz covered and the 2400 has 10~80Hz covered. With end game subs like the latter, you will never have to upgrade to other ported subs with a lower extension.