Delicious2

The year 1977, Waterville, ME. A Colby College sophomore I prowled the local hifi shops and 1 featured Klipsch. I remember being impressed but unable to consider the expense and size/weight of Klipschorns. Besides, the "formative" shop back home (Natural Sound) didn't carry any horns. They had Quad ESL (wow!) Beveridge (yowza!) Fulton J's (check the bass) and Snell (more what I could afford). Magnepan MGIIIs (nice!) were mine for a few years until I had to raise some money. I ended up with a 2 way large bookshelf Phillips 475s (cone and dome) for years all I could afford. Later it was Alon IVs for a long time. Oddly, it took a hunt for Khorn upgrades after I finally got my 1990 pair and a return to Waterville and Greg's shop to hear a more valid variation on the cupped hands demo. Greg held a K400 horn up to his mouth and spoke through it then held up his tractrix aftermarket horn which seemed to have much less coloration. I didn't bite on Greg's upgrade but later got Dave's Eliptrac horns. A nice upgrade from the K400.

Fascinating. I wonder why a change in speaker height would interrupt that effect never mind be remedied by relative channel delays? I"m such a newbie when it comes to small room acoustics... Next step for me since I MUST have "the magic of uninterrupted soundstage" is probably to get more of the big furniture out of the living room (couch and roll top desk) making the space more symmetrical and with less big objects between speaker pairs both on side walls as it is on front wall. With my old NuForce pre-pro I have nothing like Audyssey so I'm just getting in the ballpark with its speaker setup distance settings. I could bring the new Anthem AVM 60 up from the HT to see how its room correction might help with the relative channel delays.

Hmmm, 7.75 divided by 13584 is about .00057 not .000515. Are you fine tuning based on the REW measurement? By ear? So as a starting point my 3.5 inch protrusion would add about .000257 or about .26 ms, right?

"provides a uniform soundstage" - please elaborate

LOL, Seems I'm following the trail you've already blazed whether I know it or not Chris! How did you lower the K402 on the Jub? Let's see the back side there... Is there a ballpark delay I can plugin to compensate or should I just measure in REW again?

Yes, thanks for making that connection Dave. Entering into the "world of more" that is - a more complex signal chain wasn't intuitive for me, but, I now realize it was necessary and helped get rid of that "lusting after the giant killer of the month" syndrome. Going active these past months has opened up a new level of learning about my system and small room acoustics. I finally have the tools and am beginning to gain the knowledge to tune my whole system. You were there for me when I began this Klipsch chapter of my journey with your excellent eliptrac horn mod for my Khorns. Thanks!

Thanks Coytee 😸

That's right glens. I'm mixing in some of the other input channel on each one. Closing down the spread is one way of describing it. I'm attempting to get a stronger center image without using an actual center speaker. I'm still listening as to how successful this method is.

Now much closer to ear height losing about 10" from 57" down to 47".

It's quite stable with the heavy TAD keeping the weight in the rear. Vertical and horizontal aiming is still possible. The horn sticks out into the room another 4".

A new top plate from 3/4' plywood.

Inspired by what others have done building mounts/enclosures for their K402s I decided to see what I could do as simply as possible with the goals of retaining the ability to aim the horn both horizontally and vertically and get the horn lower - closer to ear height. I just modified the factory mount. By turning the arms upside down their slots allow a wider range of adjustment with the driver much lower. I moved the metal mounting base plate forward on the wooden base and attached foam pipe insulation on the front of the wooden base for the horn to rest on once its metal brackets had been removed.

For the single seat hot rod effect to see how good it can get I set the couch off to the left and pulled the single stuffed chair out away from the window. Listening is only with the heavy MoonDream brand drapes closed. With Chris' settings minus the 176Hz bump and the front channels mixed together a bit for better center fill it's starting to sound very good. Of course, it doesn't hurt that I'm discovering excellent new (to me) surround mixes such as Riverside's Love, Fear and the Time Machine and Steven Wilson's sampling of the first 3 Gentle Giant albums - Three Piece Suite.

What are your other PEQs Chris? I"d like to use your settings as a starting point for my tweaking.

Awesome room and Jubes Craig! Do tell all! Dimensions, strictly music or will there be video? more pics, more pics, more pics! I agree Chris rocks! (you may mean Bessel crossover tuning) . He has helped me tremendously too.

Thanks for the tip. Contacted seller.

Listening impressions? Pics?

They are probably too close to my ears currently at 5 feet, but, it does allow 5 feet of clearance behind the AMT on the left and 3.5 feet on the right. If I move them just outside the heating vents they'll be 6.5 feet away but only 3.5 feet to closet door on left side and 1.5 feet to sub on the right. I could put dampening thick fuzzy fabric on those surfaces.

Initial impression - better than the dome and cone they replace. Light. Airy. Looking forward to dialing them in both in positioning/back wave damping and electronically with REW and PEQs.

I realized over the weekend that the Xilica allows me lots of control over stereo spread. Not with a control labeled as such but just by how I mix the inputs into the outputs. It wouldn't be difficult to create presets with L+R full spread, 90% spread, 80% etc. Loading different presets in the Xilica only takes a few seconds and can be done on the fly so might be possible to change settings according to type of music or even recordings that sound best with more or less center emphasis. I'll play with this soon to see if it has the effect I hope.

After 5 days of playing around the clock (quietly at night) I had some time to get these into initial surround positions - basically replacing in the same place as the much smaller Michael Green 60s.

Yeah, the upside down arrangement is to get the woofer closer to the AMT if you're doing a 2 way. Chris was suggesting setting the Heil about 6 inches back from the front edge for time alignment with your analog xover or passive. Curious, where did you read 500 Hz xover? I'm starting with 800 first order (6 db/octave)

No, I think it's the stock padding. Much of the insides are covered in that same padding.

With a basic first order HP/LP set on the Xilica I'll break these in as mains for a while. Initial impression? They don't give as pleasing a rendition of Seiji Osawa and the BSO performing The Nutcracker in Boston's Symphony Hall as do the K402/TAD/Khorn blend, but, OTOH they don't sound bad even switching back and forth. Checkout the backlit AMT. Perhaps one reason they say "sound as clear as light"😎

I opened one of these 1985 Cornwall "1.5s" for the first time to wire the woofer directly to the back panel and was surprised to find holes for some alternate tweeter mounting. An experiment by a previous owner maybe.