Quote:
Originally Posted by GCool  Here is a cut-a-way of the SP cabs. The back speaker pushes out the port. 
I don't really know why some of you guys on here say that the SP410 is not as loud as other 410's..... ya right  |
Because EVERYONE who knows anything about cab design knows that isobarics do one thing incredibly well...
They go lower in a smaller box.
However, the volume output of a 210 isobaric is the same as a non-isobaric 210 cabinet...i.e. - an isobaric cab that uses 4 ten inch speakers will only put out as much volume as a 210, because the other two 10" speakers inside do not contribute to the volume, only aiding in it's capacity to put out lower frequencies in a smaller enclosure.
That isn't to say an isobaric 210 might not be louder than
some 410's. Depends on the speakers used and the overall design of the cabinets that are being compared.
To say simply that an isobaric 210 is louder than another 210 because it uses 4 speakers is misleading. Those that don't know the science behind it will be easily misled.
With regards to the back speaker pushing out the port, that is a matter of the tuning of the cab and in no way is it contributing to the overall volume of the cab. You know that and so does everyone else who knows anything about it. The pictured cab above will
put out more low end than another 110 (or 112...I can't tell what size the driver is) but it isn't going to be any louder than a well designed front loaded 110 (or 112).
Isobaric designs are old and really an outdated design save for the fact that it allows a cab to put out deeper lows without using a giant cabinet. It does NOT make the overall volume of the cab any louder. It DOES increase the volume output of
only those lower frequencies, but nothing in the way of lower mids through upper mids. So it is a bit misleading to say it's louder than standard reflex cabs that have only one driver (much less those with more drivers). Just like it's misleading for many companies to say their cabs go down low, but upon closer inspection those lows are at -10dB!
As rpsands pointed out, this has been discussed ad nauseum if anyone wants to take a little time to search for it.
And I mention this not because I think isobarics aren't any good or that these Orange cabs aren't great. I'm sure they are. They do what they do very well. But let's be honest about what it is they really offer.
That's all I'll say since if you search on this you'll find out the discussion's been done to death.
