rjbond3rd

Very exciting and a fascinating direction. It would be great to see a picture!

Yes, absolutely. Please accept my apologies for my initially harsh tone. I was out of line and I edited the post. At the moment, I'm doing a Khorn restoration (with lots of mods) but once the weather outside is nice, I will start on a pair of 1968 La Scalas which (though listenable and functioning) were converted to PA speakers. They are covered in green carpeting (glued down), all edges have metal brackets which are riveted, and they also cut into the sides to install plastic handles. So it's a big project but after it's all stripped down and repaired, I will mod, measure and post. If they are past the point of recovery (which sadly, is possible), I have another set which was stripped of all parts by its previous owner, who also cut the tops off, so it's top-hats for those.

For a given woofer, porting always goes deeper than sealed. Always. A sealed box with a Q of .5 has tight bass but it's also very light in the bass. Put that woofer in a ported box with a Q of .707 , and it will always be deeper and flatter, then rolls off steeper. Always. A box modelling program will show this. Sealed is simpler, ported is potentially higher performing. It's a trade-off. I feel that saying that one "heard Klipsch found a suck-out" is not fair. Everything offered against this reversible tweak has been based on speculation. All ported boxes are undamped / unload below the ported tuning frequency -- always. The flip side is that the speaker is well-damped at the port tuning frequency (xmax is reduced to a minimum). The ingenuity of the mod is in the choice of tuning frequency. In the end, this is something that should not be debated without actually trying, listening and ideally, measuring. Since it's completely reversible, maybe it's faster to just try it than to debate it []

Wow, those are incredible. Very classic appearance.

I have four LaScalas, and I'm going to port all of them. I'm really excited. I don't care one bit about resale value on any of them, since I am never selling them. But even if I were going to sell them, the (reversible) mod would likely increase sales value. It's not about collecting and preserving them as museum pieces, it's about listening to them. I would only skip the mod if there were already a pair of horn subs available. If for no other reason, the (reversible) mod is worth doing to get the squawker and tweeter at a more optimal height (in my opinion).