$loudspeaker sound diffraction$

LOUDSPEAKER SOUND DIFFRACTION FREE

Just play tones below 250hZ for a while and go 'walk the room.' When everything is perfect you will find that moving a speaker box forward or backward a quarter inch will shift the presence and leading edge of transients making them harder and softer.Ĭlick to expand.I posted earlier today about using internet test tones off YouTube at certain low bass frequencies to spot problems BEFORE you set up your chair and speakers and discover it SUCKS! You want instruments to occupy precise locations and NOT wander. This will double the 'best' placement you have so far and will really cut down on slightly 'off' setups where certain notes pop out in the wrong spot. Whichever speaker sounds the best leave it be and go move it's opposite member to exactly match the distance off that back wall. I then would make sure EVERYTHING is precisely symmetrical. If I didn't use a cabinet I would place two panels directly behind my main speakers if possible and experiment to get these panels to make the front image clearer and drier. My cabinet IS breaking up standing waves and flutter echo. Make it too small and the vocals won't have presence. Make it too big the soundstage gets 'splashy' and loose.

$loudspeaker sound diffraction$

This will establish where the middle 'phantom speaker' lives.īy varying how large an area this dead center reflector IS you can alter the presentation to get a seamless side to side picture of what is going on. You WANT to leave some hard flat reflective surface dead center. I use a cabinet but either close it tight OR leave it open with the ear level parts empty but for a touch up of Sonex to dry out the cabinet energy. If you put a cabinet in front for instance-it MAY upset your soundstage with all kinds of reflected bits and pieces of sound bouncing off the rack. You don't want ANYTHING in the area that isn't part of the projected image. That front wall behind your mains is critical. You can buy 4 2X2 Gridfusors for a couple hundred bucks and play around, get a feel for the dos and don'ts of adding diffusion to your room. Small, but deep enough to be effective, EPS QRD diffusers are available from the likes of GIK. But again, properly placed relative to one another, and far enough away from you so as not to give the experience sci-fi out of phase weirdness. But I've also found it that diffusion high up, above ear level, not just behind the speakers but on the sidewalls behind the listening position, can really open up a room. They're always going to be most effective with a direct angle of incidence, so more behind your listening position than behind the speakers, unless the speakers are dipoles.

$loudspeaker sound diffraction$

But if you're too close to them or they're in the wrong place they can make the sound in the room weird and phasey.

$loudspeaker sound diffraction$

The room has basically no slap echo, but doesn't seem 'dead' but I wonder if it needs some life pumped in by using diffusion.Ĭlick to expand.If you're room is 23 feet long and you're sitting far enough away from where any QRD, Skyline or other phase grate diffusers will be placed (like at least 6 feet or more), they can be amazing at making a room sound big and airy and alive. Including first reflection points on the side walls. The rest of the room has scattered absorption panels, carpet, cellular shades etc. I'm not unhappy with this setup but wonder if those two 4' tall panels, which are directly behind my speakers would be better replaced by diffraction/diffusion panels.

LOUDSPEAKER SOUND DIFFRACTION FREE

These are free standing and located 6' away from the front wall.īass is very good in the room, much improved, and I know those central panels contribute to this significantly, though they are meant more for mids and highs. The front wall has two stacks of bass traps in the two corners, a combination of absorption panels and Vicoustic bass traps.īetween these columns there is a 4' wide x 2' tall x 6' thick absorption panel flanked by two 2' wide x 4' tall x 6' thick absorption panels. They are roughly 5 feet from the front wall. In my dedicated 16x23 music room the speakers are on the short wall.

$loudspeaker sound diffraction$

Loudspeaker sound diffraction