Plans for a mid-bass tractrix horn?

[jdubs]

Guys, I want to pursue something like this:

Bass cabinets

But I need better plans. Is there anything else out there like it? Seems pretty ideal for blending with my Unity horns at ~300hz....and it goes down low (enough - 45-50hz).

Thanks!
Jim

 

[moray james]

Dual 15 PPSL is probably your best be to match up with a Unity Horn as it will provide uniform dispersion between the sub and the horn.

 

[jdubs]

Moray, can the dual 15 PPSL run up high enough (300hz or so), frequency-wise, though - and if so, does it sound good that high?

Thanks for the idea.

-Jim

 

[WithTarragon]

The PPSL should be able to reach up to 300Hz, but it really depends on the drivers and the geometry of the cabinet's slot.

I don't think I agree with the above statement that the dispersion is necessarily going to match between the two sections.

 

[jdubs]

Guys, given my application, what would be the recommended PPSL design and 15" driver complement?

Thanks,
Jim

 

[fmena]

80 Hz midbass horn?

See link for 80Hz midbass horn (click sidebar link for diy 80 Hz midbass horn)

inlowsound.com

Hope this helps

Cheers
FM

 

[WithTarragon]

Guys, given my application, what would be the recommended PPSL design and 15" driver complement?

Thanks,
Jim

Don't limit your selection to just 15in drivers.
Do a search here (and audio asylum) for PPSL and DJK.

 

[moray james]

Expo 15 since this is what you were asking for I think.
Info on how to blend a PPSL woofer with a Unity Horn about as good as it gets.
William Cowan's Homepage look under heading of Unity Horn. Best regards Moray James.

 

[Brett]

Info on how to blend a PPSL woofer with a Unity Horn about as good as it gets.
William Cowan's Homepage look under heading of Unity Horn. Best regards Moray James.

Sounds terrific, but it's not push pull.

 

[jdubs]

Guys, I like Eminence drivers...how about plans for 15" Eminence Kappa PPSL? I've done a LOT of searching and can't find actual plans for such cabinets.

Thanks,
Jim

 

[Brett]

Probably not, but there's no magic to it. Just a two driver ported pox, either 4th or 6th order, and the manifold as small as is practical.

 

[WithTarragon]

Guys, I like Eminence drivers...how about plans for 15" Eminence Kappa PPSL? I've done a LOT of searching and can't find actual plans for such cabinets.

Thanks,
Jim

You may need to do some more searching.

PPSL is a way of confguring two drivers in order to achieve some reduction in distortion (two drivers inside a plenum facing back to front). That is all it is.

You will still need to decide whether you want a ported cabinet or a vented cabinet. There might even be a horn loaded configuration. PPSL can be done with either. If you want a store-bought version that you could copy, there was one made by Electrovoice

Again, do a search here and elsewhere with the terms: PPSL, DJK

 

[jdubs]

Guys, I decided to try 2 Rythmik servo 12"ers per side in a push-pull open baffle setup. Will report back how this goes.

-Jim