What would be involved in updating Hersey II’s to Hersey IV’s?

One thing i like about the Heresy is that they are sealed... they have really tight bass and no port noise.   I'm curious to hear what a ported Heresy sounds like , it's heresy to port the Heresy in my opinion.

" Not my cup of tea ". @jsautter ...Same for me, with your overpriced loudspeakers. To me, they sounded compressed, mellow, seamed to be weak, with the leading edge of instruments, and did not, for me, have that " jump " factor, I look for, which my Lascalas give me, in spades......Granted, they played a nice image and soundstage, and offered good coherence from top to bottom, but imo, sounded like a speaker, and not like live music ( interesting, how we differ as to what live music sounds like, or, should sound like ). You can be a negative voice on any Klipsch thread, as you are not the 1st, nor will be the last, but the truth of the matter is, I am happy with the Klipsch Heritage line ( have been for 50 plus years ). The fact that they can be modified and upgraded easily, and affordably, simply creates a better music producer, for me, and others, and, crazy good at the prices, too..........However, unlike you, I will respect you, for liking what you like....So, why bother coming on here, trolling. BTW, my descriptions of your speakers, fits many others, I have owned, sold, and installed for others. Different flavors, for different tastes. Enjoy ! MrD.

@oddiofyl , fyi, there have been Heresy type speaker designs produced by Klipsch, for the live / pro side of their business, and the cabinets were ported, using a different woofer. These model 4s will be the best of the Heresy line, imo.

Having 30 years or 50 years experience of a brand has zero to do with now really, and the only Klipsch stuff I've ever paid much attention to are the "now" versions. Changes include vastly different driver materials, horn throat and phase plug technology, crossover components, internal wire...everything except how they look. I don't need to be "given" the efficiency part as that's only part of the tonal experience, and it seems that prejudice against a brand can last...remember the foam covered "L100" JBLs from the 70s? I do...relative to today they were not so great (a response curve like a big smile)...the new ones look exactly the same and actually are fine sounding (I heard 'em). 

I have been listening to Klipsch for over 30 years and they just arent my cup of tea.

But you keep listening to them?  I don't get it.

I do get that the Klipsch sound is not for everyone and have no interest in trying to convince someone that they're missing something.  I like the Klipsch speakers I have, but I own and have owned a lot of other brands, many that had a quite different sound signature and liked most of those too - Vienna Acoustics, Harbeth, Legacy Audio, Canton, Focal, Monitor Audio, Spendor, and others. 

I like some of these a lot better than Klipsch.  That doesn't diminish the listening pleasure I've experienced with my Klipsch speakers. 

If I thought they sucked I wouldn't listen to them for 30 years.  I don't see myself ever purchasing another pair of Vienna Acoustics speakers.  If someone was asking about different speaker choices and asked about VA speakers, I'd share my impressions, both positive and negative.  If someone already liked them and was posting about them, I wouldn't jump in a thread and tell them their speakers suck.  I also realize we all have different ideas about common courtesy and that mine may be different than yours.