I've been contemplating a pair of double 18s to upgrade from the four PRX718XLFs I have.
I now have a line on 4x 21" units (dB Tech S1521N - powered, bass reflex). Does anyone here use 21s and in what situations would these present an advantage over 18s? Are 21s overkill or unsuited for rock/R&B bands?
Mostly, I operate and supply for 6-10pc bands for corporate events and weddings although I would absolutely be looking for wider applications - maybe EDM or outdoor cinema clients, council festivals etc. I'm wondering if 21s might be too specialised.
Mains are 4x dB Tech D12HP, and they outrun the JBLs. Thanks for any input.
I would look closely at the response graphs and specs and make sure they will do what you need them to do.
I have no opinion about the specific products mentioned, but there are a good number of 21" cabinets that don't actually go as low as people would like to think.
People often "assume" that a larger driver will give more "bass".
That can be true, and it ALSO can be false.
It all depends on how the particular driver is used in a particular cabinet.
There are advantages and disadvantages to larger drivers.
I honestly feel a number of manufacturers simply make cabinets with 21" drivers because they assume people will buy them because they are "better" than smaller drivers.
You MUST dig into the specs (for any product) to see if it is suitable for YOUR applications.
Think of it this way-if bigger was better-why are so many companies making "mini" line arrays.
BTW-it goes the other way also. Smaller is not always better.