Onken 360 with GPA?

[rdalem]

Considering using the GPA 515-8 in an Onken 360 cabinet. Today I have some problems with the bass response from 200 Hz using the celestion 3070C.

The GPA Vas parameter is significantly more adapted for the Onken 360.

 

[GM]

Which 515-8? There's different models.

 

[rdalem]

Presumably 416 is a better option. But whether 416-8A or 416-8B fits best becomes difficult to see.

 

[GM]

Yes; 416A IIRC, so best to compare some simple vented sims to compare to the 360's measured response/tuning. T/S specs by Todd White?, others. Some older measured specs courtesy of the late Bill Eckle.

 

[rdalem]

I have tried a bit of simulation in winisd, but I get missing parameters despite entering these.

I don't think I chose wrong with 416A as this is a proven driver in the Onken 360.

 

[kevinkr]

I use Iconic 165-8G (basically the same as the old GPA 515-8G) in 11 cu ft Onken bass bins, GM may remember my project from 18 years ago. The 515 should be an excellent fit particularly if you need response into the lower mid range. I no longer remember why but I do remember after doing the analysis that I distinctly preferred the 165-8G to the 416.

http://www.iconicspkrs.com/basshorndrivers.html

http://www.iconicspkrs.com/downloads/165series.pdf

https://greatplainsaudio.com/wp-content/uploads/2016/06/Classic-Series-515_C.pdf

There seems to be some connection between Iconic and GPA.

Not cheap even back in 2006 I have never regretted purchasing the Iconic 165-8Gs, and I can say that about literally nothing else in audio.

I purchased mine directly from Iconic.

 

[GM]

Don't recall any details, though imagine it is the 165's ~515's stepped mid-bass horn design that gives it the kind of 'heart attack' 'fast' response that lured me to opt for the much more expensive 515B over any of the reflex oriented Altec, etc., woofers.