FSP-18-SXY BASS BIN

But what is an acceptible/sensible compression ratio for 15" or 18" bass horns? obviously, it depends on cone strength, and the ammount of power being pumped in.... Does having a large front chamber before the horn reduce the stresses on the cone?

For an 18" or smaller FLH a 2:1 compression ratio is considered safe.

To get an idea on the effects of horn parameters it's easy to take it to an extreme: Imagine the front chamber to be absent and on the other hand a front chamber the size of a living room.

Tony: The problem I see with your idea is that an 18" will require approximate 25 cm/ 10" build depth each, leaving only 10 cm times X for the throat (at the stated 63,6 cm width). Meaning X would need to be at least 110 cm for a compression ratio of 2:1 (for 2 drivers).

Best regards

35-75Hz? You want a bandpass for that mate.

What mobiele said. Play around in your head.

A bandpass is an interesting idea. Maybe another thread? What's the real life efficiency like in your designs?

Edited by: Deadbeat

jsg wrote: 35-75Hz? You want a bandpass for that mate.

design me one then

www.freespeakerplans.com/forum/forum_posts.asp?TID=607

And then light it up with a mean blue light, in fact use a dicroic(?) so that when you turn the wick it starts to turn red.

Thinking about all these ideas, I hope someone is going to make something soon, and these things don't stay in Cyber Space. Something should happen other wise in ten years time, people will still be making some of the strange cabs lurking on the other side, and that is not called progress.

i will make the best design over the christmas break


so you guys got 2 weeks to complete the design

Heathrow, would you be willing to compromise and build a 15-2-sxy type cab then, if i came up with a nice plan?

Deal, Tony and HBL [img]smileys/smiley15.gif[/img]

I've finished work on the TT for now (lathed some metal bearings, made a skeleton, etc), and will turn my attention to building some speakers in the little time I have left in the holiday...

I need a few Qs answered though first...

1) Is there a driver budget (that would make more sense than just 18s unless you have some already)
2) what size stacks would you use these in?

Edited by: Deadbeat

drivers from £200 to £300 pound each
but as earlier stated would prefer either the v1000 or pd1850

stacks of min 4 bins a side

must be loud, loud enough to put scoops to shame!

and remember i have built a hog scoop so i shall need some stern comvincing!