Dave A

You mean inside the doghouse? Or front to back? I added braces where the slope is on the dog house to the side walls but not the rectangular slot past that going to the back. I did clamp wood to the outside where that slot is to dampen any resonance that might occur with no bracing there but it made no difference as far as I could tell. I have clamped wood in every direction I can where it makes sense and still the resonance problem.

Well that is what I have seen but these were ripped from 3/4 x 3/4" lumber and are tiny compared to all I have seen. What I am really asking is does the reduction in size make for standing wave resonance here and can this be serious enough to create this problem I am having with resonance.

In the back inside of the cabinet if you look through the slot the woofer mounts over you can see two triangular cut pieces of wood glued to the back side opposite of the slot. Perhaps splitter is incorrect but lacking the proper name that's what I call it.

Don't know and how would I check? Run a curve with my TrueRTA program? Rather than specific frequencies here I am thinking cabinet anyway since there is one clearly different part (splitter) used in these.

Even in two channel the sweet spot effect on these is much larger and sitting directly in front of either the left or right speaker set you can still get good opposing channel sound levels. The bigger the pro gear it seems to me the better you can hear this and it took the KPT-456's to begin to show me this and the MCM 1900's really did it well. What I did not realize was how unbalanced output was with amps even though the name plate said the same thing and channel to channel on the same amp is different too. These Xilicas helped out giving me complete gain control and this made another BIG improvement.

I have found that setting the 402's right at the front of the bass bin with a focal point behind me and not pointed right at me and a 6.35ms delay yields stellar results.

Moving the 402's back as far as possible would still leave you with 40 some inches displacement with these and then a reflecting surface for sound to bounce off of so the answer is you would not do this.

I have a set of LSI's that are driving me nuts. Cabinet is tight no leaks or gaps. K-43 woofers are A-OK. I stuck a set of doghouse to side wall braces in there just to see if they would work as well as replacing the 3/4" sides with 25MM Baltic sides. The resonance problem was still severe and I was quite disappointed since I though it was the 3/4" plywoods fault. Fiddling around with it all and I noticed that the splitter is maybe 1/3 as big as normal. This thing is so small I cant believe it and I have never seen such a thing before and I have to wonder if this is the culprit and causing a standing wave issue with these. I can tame them somewhat with the room EQ on my Driverack Pro but these with braced sidewalls should not need this kind of help. These were 1984 builds and the AL has been replaced with a known good AA crossover sans Zeners which have been removed from the board. A set of my tweeters and K-55-M mid drivers which are also in good shape. Tweets and mids sound great and then purely awful when you stick you ear in front of the bass bin. Very worst resonating LSI's or LS's I have heard and those splitters are the only thing I can see.

They are way past long gone and I doubt we will see any again. I look all the time and nothing. I remind the guy who bought the last set I had how lucky he was and he is beginning to believe me.

Welcome to the forum and I hope you get the info you need. Bout time you quit lurking.

If they weren't so darned far away I would have them. It is a great deal on a rare system.

I was given a set of Heresy II crossovers minus the input cup. Free to anyone who wants to pick up shipping. Not recapped.

I have had three with AL crossovers. Don't know if that was the only one used with them though.

Yes not mine but the guy has other audio gear for sale so he is selling his system for some reason. Anyone in the nearby area looking for a great sound set of speakers these are the one's I prefer above the rest excluding all horns and of course pro gear.

But why?

Well you know how it is Claude it was the smallest wattage they had for that line. Fall will be here sooner than you think and I am going to point the big boys out at the roll up door. I will call you and let you know when so you can step outside and hear them.

I have ended up using two Crown xli800's. I don't have a lot of experience with different amps and these are good enough that I am not looking either. 200watt per channel 8ohm and I have never gone past half the output according to the volume control on my current setup.

I had to be dragged into electronic this and that kicking and screaming. But now that I am here it was worth it. On Jim's 456's he might have 2 or 3" difference in driver depth so I cant see he would ever need to do time alignment. Bi amping and dialing in all the drivers with EQ and gain along with REW measurements I bet would help though. I have Crown amps, Xilica and REW setup and I cant see needing anything more for my lifetime based on what I am hearing here today.

Well that's how you do it. I decided I needed to add CNC machining to my skill set and went and bought a Haas VF3. Well do you know how to run one my friends say? As a matter of fact no but I bet I figure it out. Unless you get a set of 402's to go on those I would not worry about time alignment. Your drivers are so close I doubt highly anyone could hear a difference. Now if I talk you into building a set of S-MWM's with an 88" difference between drivers you might need it. I ended up going active and there are enough benefits to doing so besides time alignment that I will not be going back to passives for my personal systems. Bi amping made me discover that output from the same type of amps will differ and balancing that also will make a difference. I remember when I first heard 301's. I still like the older ones with cloth grilles the beat and you recap and stick some MAHL tweeters in there and they are awesome. But yeah you start finding out about things like 456's and better and all the other stuff just does not cut it anymore. I was pleased to see you get those. You were lucky by the way. There was a brief flurry of those to hit the market and then nothing anywhere. I sold 8 sets and none lasted more than two weeks and most were gone in a week and I have looked high and low for more. Don't let those go.

If I were ever to buy new these are one of the finalists. Those 942's are pretty compelling too.

Well I did the same thing he did in a manner of speaking. As we find out more we look for different things to buy but we still have many of those bits and pieces we have bought along the way. Some are useful and some need to be sold off.

Time will tell. I hope it does.

Anybody have some old ones kicking around they don't need?

Honestly I have decided I am not interested in what you do. Do what you want I don't care and won't be back to reply.

If you are in the NJ area here is a set starting off at $650. I normally end up selling ones like these with recapped crossovers for $1,200. Great sounding setup and my favorite of all the old speakers that are not horns. https://www.ebay.com/itm/klipsch-chorus1with-crites-crossovers-and-MAHL-tweeter-upgrade-with-B-E-drivers/153584576931?hash=item23c25aa9a3:g:SPMAAOSwPvFdNeFJ