Tag Archives: Klipsch K-79 drop in replacement


Not everything I come up with gets shown to people nor do I even make some of everything that has been designed. That is part of the discovery process and there are times when inspiration gets ahead of common sense and you guys never get to see the wasted hours spent fiddling around with ideas. Well I guess it is not really wasted but surely is not productive either.

  In any case I have had Klipsch heads after me for some time to do various things like for instance a wood horn for La Scalas and KHorns. Another one is a wood LMAHL or Large MAHL. I have held off on this because that .2″ flange that gets recessed into the motorboard (or baffle as they are known in many places. Motorboard to me because that is how they were named on the Klipsch forum by many.) cutout is plenty for the plastic and aluminum flanges. For wood however my fear was the ability of wood to split out at the corners where the bevel head screws went for mounting. I could have just had drilled holes and a flat bottomed screw but I did not like how that looked when modeled. As in one of those things no one see’s but me.

  Now how you get somewhere may vary from person to person and for me sometimes odd things lead to inspiration. I have had a couple of people that wanted MAHLS with no engraving on them so I removed it and they looked pretty good and now wood MAHLS are only cut this way. So I think, what if I remove the screw holes and the engraving how would that look and what would I do for mounting?

   For better or worse I did come up with something. My concern here is you can tell people not to tighten something down or they can split or ruin it.  What constitutes snug enough is a wildly variable amount depending on the person. Thinking of the few stripped screw holes I have had to deal with over the years of restoring Klipsch speakers and people with screw guns.

 I think I came up with a way of doing it that is not fool proof but as good as the material used will allow for. First up is a front view.

Second up is an assembly view showing how I propose to clamp the horn to the motorboard.

And the third to show it without the motorboard.

I expect to be offering these soon as yet another variant of the MAHL’s as soon as I get a speaker to try them in. I need to check for clearance with other drivers and horns and to see just how much pressure is needed to tighten these down enough to stop any cabinet rattle but not be so much that the flange is split from the lens body. I am using serrated bottom nuts for these to lock things in place.

One of the final questions I have to answer is will the DE-10 I commonly offer with the LMAHL be to heavy for this mounting method? I might just offer these with DE-120’s as they are much less weight though sadly almost double the price my cost. Looking to get some KPT-301’s soon as test beds so for those of you wanting these your time just might be soon at hand.

Introducing Machined Audio Horn Lens

This will be a brief introductory post today which will herald the launch of a blog/website relative to what occupies my life now.

For some time I have had a love affair with Klipsch speakers and when I used to travel around the country welding stainless steel tables together for the Chuy’s Tex Mex chain I had a chance to buy and fix many sets of speakers.

This became a passion of mine and more than wanting to just get them home and fire up something I had not heard before I want to know what could be done with them. It is a learning process and I ran across the official Klipsch forum The Klipsch Audio Community and there discovered a whole new world of technical ability and tweaks and how to’s relevant to my favorite speaker brand.

It can be a path with no end and at first I started with recapping crossovers since that seemed simple enough. With proof in hand some simple things like recapping made a real difference in what I heard I started looking more and more into restoring, tweaking and rebuilding.

A couple of years ago the trips slowed down and Klipsch started getting more expensive fast and much harder to find. It was evident that without paying trips where I could as a bonus buy used Klipsch at the other end I would not be able to buy fix and sell and show something for my time.

Now when you are a CAD and CAM guy you mind can quite easily wander over to if you can’t find something to fix what can you find to make?

The end result was a tweeter replacement for the K-77 in a set of one piece fiberglass coated La Scala Industrials I had at the time. I used an Eminence APT50 driver on my machined aluminum horn and man what a difference it made. It ate up all the shrill I objected to without me really realizing it was the K-77 tweeter doing it until I replaced a set.

This was the first version and I bought the APT50 because it was cheap and did not know better. Even so it still was a real improvement.

I can come up with ideas and designs and machine things but I am not a software using speaker and driver testing wiz (yet) with audio so while I was coming up with improvements I had no way to know precisely what was the level of improvement.

About this time a gentleman by the name of Claude Jodoin became interested in what I was doing and he did have the technical ability to analyze what I was doing and he has been a significant help since. Tip of the hat to you Claude.

Over the course of the next year and a half or so there have been perhaps ten iterations of various shapes until the latest versions which are the LMAHL V2 and SMAHL V2 tweeters.

While designing these it was my goal to offer something never done before. What I came up with was a system that would allow more than one type of driver to be mounted on the horn lens. Today I have the only modular clamp system that will allow three different mounting bolt patterns on the SMAHL V2 and four different mounting bolt patterns on the LMAHL V2. Plus the machined aluminum looks darned cool.

I have also started cutting some out of wood, primarily Black Walnut right now and these are limited to the SMAHL V2 size.

I have other ideas in various stages of design or completion and if you tag along over the next few months I will be talking about them all. I believe my tweeter retrofits are the very best out there for Klipsch speakers and they are the ONLY ones that sound this good and have superior versatility engineered right in.

I do have these for sale right now on EBay and if you go there and type in “LMAHL V2” or “SMAHL V2” you will find them. You can also buy direct from me at this time by posting a comment and I can reply to your email that way. This will save you a bit of $$$.

Bear with me I am having problems with comments showing up publicaly and I can’t figure out why. I do see all comments though and can reply. I approve them and now they don’t show up. Seems like nothing just works right the first time anymore.