Orange Isobaric Cabs, SP212, SP410 questions

[CL400Peavey]

Originally Posted by GRoberts

Just got an Orange TB500H. Mad freakish Love!!

So now I am contemplating a single or dual cab solution that is portable but capable.

Consider the pair of SP212's ...or what an a single SP410? My local shop had an SP212 and it sounded great. But I think I would want a pair. But what about a single SP410?

Isobaric cabs are an antiquated design. Double the drivers to make up for a smaller box, and no volume gain from the second set of drivers.

[GRoberts]

Originally Posted by CL400Peavey

Isobaric cabs are an antiquated design. Double the drivers to make up for a smaller box, and no volume gain from the second set of drivers.

Are you saying the SP cabs are not a worthy option? I want small and portable, but capable of delivering the punch when needed. I was impressed with the output of a single SP212 today considering its size and weight. But its not the last word either.

[CL400Peavey]

Originally Posted by GRoberts

Are you saying the SP cabs are not a worthy option? I want small and portable, but capable of delivering the punch when needed. I was impressed with the output of a single SP212 today considering its size and weight. But its not the last word either.

If you like it, then its good. But you gain no spl from the interior drivers.

[Downunderwonder]

You get sensitivity advantage is all. The iso cab runs out of excursion with half the power the single driver cab would take.

[GRoberts]

Would like to check out the SP410. Anybody here have one who can compare and contrast, or comment?

[bgavin]

Originally Posted by CL400Peavey

Isobaric cabs are an antiquated design. Double the drivers to make up for a smaller box, and no volume gain from the second set of drivers.

The isobaric, exponential horn and reflex (vented) cabinets are all the same era, thus all antiquated.
Harry Olson detailed all three designs in his masterwork "Acoustical Engineering" first published in 1940.

The sole intent of the isobaric is reducing the required internal box volume by 50%.
It is not 2x louder, does not clean your room, nor do your homework.

Back in the antiquated era, cone mass was light, Vas was high, and a huge box was required to obtain bass response.
The iso design cut that huge box in half.

Today, a designer can take an Eminence BP102 down flat to 32 Hz in 4 cubic feet, or 32 Hz in 2 cubic feet, isobaric.
Driver cost and weight is 2x.
Cabinet complexity is at least 2x over a simple vented box.
It's all about the tradeoff.