Tag Archives: Klipsch Cornwall

The Beauty of Wood

    One of the things that I find fascinating with machining is the idea of cutting anything within reason. One day I got to thinking about wood horn lenses and what they would look like.

    I have 56 acres of mostly woods and used wood to heat shop. In the process of cutting for the heater I have seen many interesting pieces of wood over the years. I saved some with no idea as to what I would do but they were to pretty to throw out. In the mean time I had begun cutting the SMAHL and LMAHL tweeters in aluminum and when people on the Klipsch forum saw these they started asking about wood.

    Cutting wood is a different animal than metal and there was a learning curve. The V1 type lenses were cut in Walnut and Red Oak. This choice of wood was based on the veneer types Klipsch used on the vintage speakers I like so well so I used the same for my tweeters.

     Walnut cuts like a dream and is smooth enough to not need further work unless you require a perfectly smooth surface. I have coated them with Satin Spar Polyurethane with very good results as is when finished with just a little hand buffing with a scotchbrite pad. Red Oak however is a different story and with it’s much coarser wood grain and pore size was a nightmare to get even close to good. No matter what there were always some pick outs with this. Liked the wood grain pattern appearance it had though.

    One thing leads to another and there have now been perhaps six or seven variations on these lenses to arrive at the current one which I do not expect to change in the future.

    There is a huge variation in wood and I find a lot of it quite appealing. Here for instance is a set of Walnut Crotch SMAHL V2’s cut recently which turned out well.

 

DSC_0101

Black Walnut Crotch Wood SMAHL V2

      In case you are wondering wood does not change the sonic characteristics of these tweeters and these are cut with the exact same geometry as the aluminum ones and indeed the same cut paths with the feeds and speeds modified only.

     One of the other ideas I am kicking around is building complete speakers and cutting mid range horns into the motorboard. It will be a while before I get these done though as first is building and testing and figuring the best way to cut to allow for minimal to little hand prep of surfaces.

    small wwood mid

  Sorry about the glare on the LMAHL V2 but I did not have time to redo the picture. In any case the main item of interest is the mid range horn  cut into stacked and glued 25mm Baltic Birch which I am a huge fan of. Folks if you are going to ever make a speaker and want it to be durable and sound right and be good looking you cant beat Baltic Birch. This would get an Atlas Pd-5vh driver and have an aluminum mounting plate to the horn. Now I may or may not build this as it was a test run but I think it is part of cutting in wood and a work on progress. I will have more on this mid horn topic soon in a separate post.

 

  In any case just letting you peek behind the curtain at some things I will have finished and up for sale soon and planting seeds for the future. I might start offering exotic wood cut to order for the SMAHL’s in addition to the Walnut soon to be out there.

  Sadly at this time I do not thing the LMAHL’s will be offered in wood as the .20″ thick flange is too thin to be durable as a drop in replacement for Klipsch in existing motorboard cutouts.

  Until next time and some other variations of the tweeters lenses for specific Klipsch situations.

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.