Emile

Yes; will try that ... but seems to have a steep learning curve

Thanks @Chris A. Thanks a lot for the advise. Was measuring an equal triangle between my 2 speakers. Yes; big drop of at the high end ... guess that is why it did not sound "dynamic" to me ... especially since I am used to KPT-904's Was using Chuck Mangione's CD "feels so good" as a first test. (Probably a bit low end boosted.) Will try a better classical recording next. Again my thanks! Cheers, Emile

Haha ... yes; just learning ... 45 more to go. Thanks!

OK; beginner at this Got a Umik-1 mic, MiniDSP 2x4 and downloaded REW. Testing it on my (back) Cornwall I speakers which are powered by a Yamaha CR-620 ... signal is coming from the "front" (zone 2 pre-out from an Onkyo ZR810 AVR). Ran REW on my speakers ("RED" on graph). Let REW "equalize" it (with a "basic" home curve) and loaded the values into the miniDSP. Played a record, comparing "straight" input vs miniDSP input. Kind of disappointed The original sound seemed much more dynamic than the modified sound Do my ears have to get used to it??? Last ran REW calobration on the miniDSP output ("BLUE" on graph). Am I missing something basic??? Thanks, Emile add-on ... bypassing low filters; high filter set at 34Hz

Still experimenting ...

OK; just for fun ... Susan Boyle on "Britain's Got Talent." It is a "must see," just to gauge the responce from the judges and the audience.

Thanks! Never heard her before, but absolutely AWESOME Cheers, Emile

OK; one more ... Les Miserables ... "I Dreamed a Dream" performed by Ruthie Henshall

Good selections, but most are "popular" music. Going to recommend Maria Callas to really test your system (and your hearing)

OK; tried my 12x16.44 inch carbon fiber panel with a single exciter ... actually pretty impressed Here is a frequency plot ... "red" my Cornwall's for comparison ... "blue" one exciter on carbon fiber plate ... "green" two exciters without a panel. Really no clue if it means anything, but sound is pretty amazing (actually sounds "clean") with just one exciter on the carbon fiber panel. OK; making a second panel (pain in the azz ... takes 2 days ) Cheers, Emile

OK; no clue yet Carbon fiber panels with honeycomb material are still in the press ... ok; between two pieces of wood with three clamps So' measured my Cornwall's (yes; very bad placement; back wall speakers) vs exciters just sitting on top of small cardboard boxes Cornwall's are "blue," exciters "brown." Obviously no "bass" from the exciters as expected, but reasonable (?) across mid-range. Any thoughts? PS, very interesting, but certainly not hi-fi (sofar)

Had my first chicken wings in Taiwan, probably 40 years ago. "There," they were considered a delicacy ... 40 years ago in the US they were ground up for pig food. Oh well; "marketing prevails" and now they are 50 cents to $1 a piece. But; need a bone in it ... who knows what is in the "boneless" wings

Tried to figure that out when I was going to build a "Heresy" box as a center channel. Thought Klipsch used "Baltic Birch" which has a "thick" layer of veneer (actually, all layers are birch with the same thickness). But NO; they used cheaper birch plywood with a very thin veneer on top. Think (????) it is only 1/32" so be very carefull Cheers, Emile

OK; got carbon fiber veneer panels (4 x 12*33 inches) and a 1/4" honeycomb panel. Cut one piece to 12x16.44 inches and glued it ... pain in the azz ... one pass through the carbon fiber and the utility blade is dull ... heavy duty glue does not spread ... will check it when it's dry tomorrow ... obviously not as easy as I thought Thought I had it all figured out ... use oversize carbon fiber and glue it to a frame ... then attach (glue) a (smaller) honeycomb panel to it and attach the exciters. Nah ... need a carbon fiber "sheet" (impregnated with resin) to attach to the panel OK; we'll see what happens to my first test section Cheers, Emile

Hi @ ThomasD ... sorry for the late reply ... just "missed" it If you are driving Klipsch speakers with your Marantz 2230, I am sure you will have sufficient power. The Marantz 250 looks awesome, but probably enough power for a stadium Love my 2252B ... it is hooked up to Pro KPT-904 speakers ... when I turn it "up," all the neighbors come over for wine ... obviously loud enough I've got 2 reel to reels ... a "good" Teac 1000R and a smaller (7") Akai. A lot of fun, even though I (almost) never use it ... but just "had to have it." You can find reels on FleaBay, but usually the are pretty expensive (go for 7IPS). Better source is a local (used) record shop if there is one in your area ... they often have a small selection. Yes; have a Heresy now as a center channel. Much, much, much better than any "horizontal" center speaker ... they "suck" ... mostly "marketing" because it looks nice with a TV. Good luck with your KG1's ... think you will like them. Next are the Forte's or Cornwall's ... much better but not even close to the Klipsch Pro speakers ... but low WAF on those ... be careful Cheers, Emile

Haha ... she left this morning to visit her mom for a week ... I can "play" now

Some technical info. NXT (New Transducers Ltd) was one of the pioneers in this field. Of particular interest is their 1995 US patent https://patents.google.com/patent/US6904154 which provides quidelines for panel size and exciter locations. Recommended panel sizes are 1.134/1, 1.37/1 and 1.41/1. Exciter locations on 4/9th, 3/7th and 5/13th (x/y locations should not use the same node line for x,y). Preferred exciter mounting is on a fixed frame with the exciter then being glued to the panel. Interesting because I've read hundreds of pages on various forms ... 99.9% of people just use scrap pieces of wood or foam and slap an exciter onto it ... guessing at sizes and locations ... it is utterly amazing that they still seem to get decent results OK; waiting for my stuff to arrive

Awesome!

Very interesting. Thanks But ... not ready to break down walls

Yes! Those speakers are often referenced by "better" designers

OK; ordered some exciters from PartsExpress and carbon fiber from another place ... picking up honeycomb panels from a local fiberglass shop (Haha ... did not want to screw around with cheap styrofoam panels ... what's another couple of dollars for a hi-fi nut ) Will post some results in the next couple of days. Cheers, Emile

Seems carbon fiber with a 1/8-1/4' honeycomb (w/ 1/8" cells) is the preferred material. Not much info from DIY's as this stuff is about $100 per square foot ... ouch especially since I believe 2x2' would be much better. OK; will order some tactile speakers from PartsExpress and "play" with cheap boards before I spend big money Cheers, Emile

Interesting never thought of that, but makes a lot of sense. Thanks!

Yes; that seems to be the problem Lots of unscientific experimentation Want to try it but cannot decide on the material for the panel ... Haha, maybe I'll try a graphene sheet Yes, same here but think their "intro" model is about $7500 per panel