The ultimate enclosure for the box 18-500 8a

bass*en*mass wrote: app what exactly are you looking for? more spl or more sub? reduced distortion and reggea  dont mix up in my books.. :)

Im not quite sure yet

"the ultimate enclosure" something which has it all with the driver mentioned.

The reflex I use now sounds smooth and goes low but is not as loud as could be. Horn would be louder but wouldnt go as low. PPSL and bandpass boxes are something I dont know much about (yet).

But Id like to have it all, efficient,loud and low and something which could be used without separate kickbins.

Or a really good compromise

Well see what our brains will possibly come up with

app wrote: The reflex I use now sounds smooth and goes low but is not as loud as could be.

for louder, you will need a beefier driver I'm afraid - or simply more of the same units. So in a way, PPSL helps a little bit, but you have double the cost for drivers.

Once you consider the amount of cabinets you need with a "wimpier" transducer to get even SPL wise with a single box loaded with a more powerful driver, the price difference might shrink... if you factor in the cost of wood, probably even more. And you'd have less boxes to carry for same output....

Anyway, would be an interesting exercise to compare two single 18" vs 18" PPSL output and sizewise.

app wrote: "the ultimate enclosure" something which has it all with the driver mentioned. [...]  efficient,loud and low and something which could be used without separate kickbins. Or a really good compromise

I have a hunch it might do that

bass*en*mass wrote: app what exactly are you looking for? more spl or more sub? reduced distortion and reggea  dont mix up in my books.. :)

that's definitely a caveat

I simmed a 6th order bandpass.
Can take about 800W before going out of xmax.
129db at 1000w,xmax just a little bit over.
99db@1W

Rear chamber is 170l tuned to 38hz and front chamber is 76l tuned to 85hz.

Port air velocity under 18m/s with 1000w and group delay peaking at 27ms @ 25hz...

Ideas how to get the bottom to go to about 40hz and maybe a bit higher too in the other end?

This is the first 6th order bp Ive simmed ever. Does it look shitty?

Thanks!

Please link 18" ppsl plans here if you have them.

Would like to see some plans to get a better understanding of the ppsl designs.

At the moment Im really interested in building a 18" ppsl enclosure for the box 18-500 8a drivers.

I wonder when people who have heard a ppsl sub say that the bass is different,different in what way? Less distortion yes but does it still shake the room and feel heavy or does it feel like something is lacking in the bass? Some say its the best sounding sub...

The Qts is high enough on those woofers that the box will be a bit large.

"Yeah I read that you suggest building the enclosure 4 x the Vas of the drivers"