Speaker Placement - Frequent Placement Changes?

toro3 OP

Thanks for your compliment,

Once I learned how to insert images in posts from Virtual System(s), I use the Virtual Systems for many things

https://www.audiogon.com/systems/users/elliottbnewcombjr?_gl=1*k6rjsa*_gcl_aw*R0NMLjE3NjI1NDY5NjMuQ2p3S0NBaUF6cmJJQmhBM0Vpd0FVQmFVZGNKRWg3clZ3b3dXRmM2UGxnazdkaE8zeVNqM2lEREczaGFhUTk1SUFETGJhcldkb3k4ajlSb0M2MFFRQXZEX0J3RQ..*_ga*MTQ0MzA1MzQ4Mi4xNzUyNzEzMTU1*_ga_SR0PMVVEN1*czE3NjMxMjM4MjQkbzE1OCRnMCR0MTc2MzEyMzgyNCRqNjAkbDEkaDgzNjY0ODE4Mw..

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DBX Cross Dispersion Method

The other end of my main listening room is a small 5.1 Home Theater shown in this Virtual System (above TV is artwork, not a speaker).

https://www.audiogon.com/systems/9511

The rear L/R are behind the sofa, laying on their backs, using the 6" space between the wall and sofa like a sound channel/horn,

a single 1,000 watt self-powered sub just for Jurasic Park Dinosaur Stomps is out of sight

 

Front L/R , and the Alternate Toe-In Virtual System, are DBX Soundfield 100

https://www.hifi-classic.net/review/dbx-soundfield-100-135.html

The resultant WIDE CENTER is created by what I call DBX Crossfield Dispersion, there are 3 tweeters, one each of the front faces, and the Third on the outer rear face,

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For my Main 2 Channel Music System, for two listeners, I alter the toe-in so each listener is closer to one side, yet the dispersion is more direct from the other side, which works quite well.

My speakers are over 100 lbs, on 3 wheels, the tops are tilted, Donna’s stuff on top, they stay put, nothing vibrates off them, yet I am able to re-position them as needed. (I used spikes in the past, I perceived no advantage, flexibility was lost).

toe-in for one centered listener

Toe-In for two off-center listeners, pivot without moving the inside front corner

other DBX designs

https://www.hifi-classic.net/review/dbx-soundfield-10-509.html

https://www.hifi-classic.net/review/dbx-soundfield-sf5000-571.html

https://www.hifi-classic.net/review/dbx-model-228-272.html

https://www.hifi-classic.net/review/dbx-4bx-352.html

my dbx 100 link repeated

https://www.audiogon.com/systems/9511

 

 

Slightly off topic: I run Duevel omnis which are generally believed to be far less critical on positioning.

Far from it! Even millimetre adjustments have profound impact on soundstage localisation and bass response as well as overall transparency. 

In addition proper room conditioning with bass traps in the corners and first inflection points as well as proper floor and ceiling damping have direc impact on proper positioning. 

checking once or twice per year after having established optimum poaitions tends to not,result in changes unless there have been major equipment changes.

@elliottbnewcombjr great post with pictures.

For whatever reason, I thought you were using Cornwalls, but you’re obviously using DBX speakers - apologies, I was fading pretty quickly last evening. 

 

For my Main 2 Channel Music System, for two listeners, I alter the toe-in so each listener is closer to one side, yet the dispersion is more direct from the other side, which works quite well.

My speakers are over 100 lbs, on 3 wheels, the tops are tilted, Donna’s stuff on top, they stay put, nothing vibrates off them, yet I am able to re-position them as needed. (I used spikes in the past, I perceived no advantage, flexibility was lost).

toe-in for one centered listener

Unsure if this is similar, but I’ve played around with extreme toe in with my Tannoys with the axis crossing 12” in front of the MLP. This accommodates two people much better since we’re both allowed phantom center imaging. Since my spouse rarely listens with me, I’ve settled with minimal toe in with the axis crossing 12” behind me. In Tannoy’s manual they recommend extreme toe in, but I’ve always found myself going back to more “traditional” toe in. I suspect, and I could be wrong, that part of this recommendation was to accommodate normal living environments that typically don’t include room treatments, especially at the first reflection point.

toro3 OP

I have 1 room: 2 channel music one end, small home theater across the other end of the room. the 2 chairs in the middle simply turn around as desired.

dbx soundfield 100’s are for the home theater.

I use their principle of cross dispersion with my music system sealed box speakers.

They are Custom Made, similar to Cornwalls, 15" woofers, horn mid; horn tweet, but the innards are all electrovoice drivers, crossovers, L-Pad controls.

here’s the innards

the parts all came from a 1958 Fisher President II Console I inherited from my Uncle Johnnie in 1973. That’s how I got hooked on great sound and tubes

https://www.audiogon.com/systems/11420

The unit was up on 8" bronze legs, the woofers fired downwards, I made taller enclosures to face them forward, increase cubic feet, and a rear vent that is closed here, it was open in prior location with no wall behind.

 

I have a pair of Acoustat 1+1's and they're pretty darned persnickety about placement with regards to sound stage. Add in the inevitable requirement for compromise in a shared living space, in this case the living room, and my options become more limited. A couple of weeks ago my spouse noted that the speakers seemed further in the room. By two inches. "Really hon? I hadn't noticed..."

That said, they are pretty much in the ball park where they are usually so good on me. 

Additionally, because they are so sensitive to placement every few months for fun I tweek them a bit for a different stage. Accutely toed in they produce a fairly wide sound stage. However, seemingly counter-intuitively, if I open the angle a bit the image becomes pinpoint sharp in the center and moving my head either way skews the sonic image. It's pretty amazing really.

Anyways, nothing productive to add to the post. Just wanted to chime in. 

Happy listening.