Full range enclosure options - Hornresp

[rstutz]

I have a pair of Dayton Audio ND65-8 2-1/2" full range drivers that need enclosures. Top priority is sound quality, then size, then SPL.

I began by plugging the driver into Hornresp but have had a hell of a time getting the line reasonable flat above 600Hz without adding a ton a stuffing. Looking for alternate enclosure types or suggestions on modifications to make to the existing model to achieve a flat response curve without so much dense filler.

 

[planet10]

You seem to be getting a pretty extended response from such a small driver, likely not very sensitive.

Nice to see a HR sim where someone has added the damping. Any quarter wave pipe will have a ripple train based on the findmental resonce and the shape of the pipe.

Without the damping you see all of the ripple, making it hard to interpret.

So your reults are effective (althou you might be best to think of this as a midTweeter in a WAW.

dave

 

[GM]

FYI/FWIW, the driver's specs is better suited to an expanding (ML)TL:

While the 'sweet spot' (mean) is a ~0.4412 Qts', a 'close enough' simple guideline is:

~0.403, Vb = Vas, Fb = Fs (MLTL)

< ~0.403, Vb = < Vas, Fb = > Fs (inverse tapered MLTQWT)

> ~0.403, Vb = > Vas, Fb = < Fs (expanding taper MLTQWT/MLhorn)

Qts' = Qts + any added series resistance (Rs): http://www.mh-audio.nl/Calculators/newqts.html

 

[rstutz]

Update after several more hours of experimentation.

 

[GM]

Note that for most correct sim the expansion is parabolic if one pair of sides is in parallel.

What is vent/mouth velocity @ ??? power?