Best DIY sub for 18" driver

[juxta]

What's the best DIY sub design to utilise a 18" Driver?

Tapped horn?


Bill Fitz Maurice?

[Moondog55]

Perhaps you need to tell us which driver you have, horses for courses and all that.
Personally I like the Kicker CVR 18 in a 250liter sealed box but I can't afford the postage from England and my mate won't sell his

[rhapsodee]

What about a transmission line? I wonder why they are not popular anymore these days among the diy community...

[juxta]

Originally Posted by rhapsodee

What about a transmission line? I wonder why they are not popular anymore these days among the diy community...

Whats a transmission line?

I use the system 4xKlipsch 3 ways outdoor, have heard the tapped horn can be very efficient, maybe I could just use a 15" and maybe build another down the line..

[polviggen]

if you're going hornload and a 18 incher you're going to end up with a huge cab. not, 15 inchers won't be small either if you want them to go low and loud.

[juxta]

Originally Posted by polviggen

if you're going hornload and a 18 incher you're going to end up with a huge cab. not, 15 inchers won't be small either if you want them to go low and loud.

Size doesn't matter too much, if it will fit in a trailer i can shift it.

Any pics, info, plan suggestions would be great!

Thanks for the replies

[davygrvy]

In general, 18s are too fragile to be used in a bass horn due to the pressure at the throat which tears the cone. Bigger doesn't really mean better.

If you had say... nine 8" MCM 55-2421 woofers you'd have a total Sd of 1872cc. With an Xmax of 8mm that's a Vd of 14976cm3. An 18" has an Sd of around 962cc, so that'd need 15.5mm of Xmax to equal this cloud-9 array. Power handling would be just short of 1kW.

Oh, and the MCMs can survive a really high compression ratio for use in very efficient horns which make a lot of pressure at the throat. Shhh... don't tell everyone.

With the MCMs at around $25 each with a coupon code, sell your 18" before others learn about this.

[littlemike]

Shhhhhh. I thought I told you this was a secret.

Keep it down - now everyone will know......

Oh - wait - I posted all the details of my quad 6" driver powered (tang band W6-1139) tapped horn earlier...

Multiple small drivers in a high-compression ratio horn (or tapped horn) can certainly be a good thing. I know I certainly have plans for my version of a 6-pack.

Many hands make light work.

[Rademakers]

In general, 18s are too fragile to be used in a bass horn due to the pressure at the throat which tears the cone.

"Coughh"

No offence, but there is such a massive amount of 18" horns used in professional audio (PA) that it should end any discussion, about that subject, before it begins.

Regards Johan

[davygrvy]

Originally Posted by littlemike

Many hands make light work.

I'm so there