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Post by geebo on Aug 14, 2017 9:15:18 GMT -5
S x WD / SQRTDVC x IVCW / CV where S=speed of sound in MPH, WD=woofer diameter in inches, SQRTDVC=Square Root of Driver Voice Coil Diameter in inches, IVCW=the Inverse of the number of Voice Coil Windings and CV=Cabinet Volume in cubic feet. The results is in feet. So take a 12" woofer with a 2" voice coil with 198 winds in a 4 cubic feet cabinet you'd have 767 x 12 / 1.414 x .005 / 4 = 8.136 feet. Simple! I agree, but thats only on Tuesday! The rest of the week you need to multiply by F(x), simple! 😋 That's correct. And the value for F(x) is always 1.0. Sorry for the omission. |
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Post by monkumonku on Aug 14, 2017 9:29:20 GMT -5
I agree, but thats only on Tuesday! The rest of the week you need to multiply by F(x), simple! 😋 That's correct. And the value for F(x) is always 1.0. Sorry for the omission. I thought F(x) was always 0.0? |
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Post by geebo on Aug 14, 2017 9:46:53 GMT -5
That's correct. And the value for F(x) is always 1.0. Sorry for the omission. I thought F(x) was always 0.0? It is when you subtract 1.0 from it. (F(x)-1)=0 |
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Post by bluemeanies on Aug 14, 2017 10:41:18 GMT -5
It's how much flexibility you have in your room.
My room has a nice length of 25' but I lack width and height.
My front screen wall is 8' wide and the rear wall 11'
I am seating approximately 6' from my speakers 🔊
The next step would be to eliminate ate four theater seats that are located behind my maiin seating position.
It sounds good to me...nothing is perfect especially with audio unless you are constructing a room specifically for 2channel. Not many people have that option.
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Post by Deleted on Aug 14, 2017 11:50:36 GMT -5
A proper answer to this question requires consideration of three things, and there are simple adjustments you can make to get the best possible sound in your room, even if it's a small one.
1) What is the maximum distance you can put between yourself and the speakers in the room? Normally it's a good idea to maximize this. Start with your listening position near the back wall, and the speakers right up against the front wall. Move forward in the room toward the speakers until you are out of the area where congestion and bass reinforcement occurs. By moving close to and further away from the back wall a few times you can hear where your proximity to the room boundary is really beginning to affect things.
2) What is the minimum distance you can place the speakers away from the front wall before bass and mid-bass response becomes excessive? Bring the speakers away from the back wall until they are as far into the room as you can live with them, then start to move them back towards the rear wall until the sound becomes congested. Then move them back out into the room until the congestion just begins to clear up.
3) What is the size of the speaker array? Does its configuration diminish off-axis high frequency response or induce frequency response ripple due to inter-driver phase relationships? You can determine this by moving a few feet from the speaker, then standing up and sitting down to put your ear alternately on-axis with the tweeter or off-axis, and listening through the whole range of the speaker for artifacts from off-axis listening. You might need to put extra distance between the speaker and the floor if you are listening close up, so that the tweeter is positioned at ear level (I've seen this called Texas Headphones.)
If you just can't get a good placement for your speakers and yourself in the room, consider head-fi. Headphones take the room out of the equation, and many headphones are very comfortable. I listen to Beyerdynamic headphones that have velour ear pads and semi-open-back design, so they don't create a sweaty feeling or closed-in sensation. Comfortable options are available, thanks to the current proliferation of headphones.
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Post by Axis on Aug 14, 2017 14:22:27 GMT -5
Rooms come in all different shapes and sizes. Sometimes listening distance does not trump having space to the sides of the speakers. The common living room dimensions are 14ft to 16ft x 18ft to 24ft. Placing your speakers on the longer wall side of a rectangle room may not provide you a farther distance from your speakers but can provide a better sound. I would not say that you always place speakers where there is the greatest distance between the listening position and the speakers. That may have your speakers close to walls on each side of the speakers. I am not kidding when I say you do not want sound reflecting off those side walls. If your rectangle room short wall is 12ft or 14ft that gives plenty of distance between you and your speakers when speakers are placed on the longer 18ft or 24ft wall. Speakers placed on the longer 24ft wall and 5ft or 6ft apart will give the space they need between the walls on each side of the speakers. Speakers that are 6ft apart, you can easily listen 6ft from them. You still have plenty room to bring the speakers away from the back wall and more than 6ft to listen from.
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Post by gus4emo on Aug 14, 2017 17:36:33 GMT -5
Here are two examples of being too close.   Somebody should've turned the music on while the guy is that clise, lol... |
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Post by gus4emo on Aug 14, 2017 17:37:04 GMT -5
Here are two examples of being too close. Somebody should've turned the music on while the guy is that clise, lol... Meant close... |
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Post by sahmen on Aug 14, 2017 22:32:35 GMT -5
Here are two examples of being too close. Somebody should've turned the music on while the guy is that close, lol... Ouch! That'd be almost like hearing the "music" of a jet engine's thrust, super super up close,... music which will totally blow the poor dude away..    or crispy fry him up like a Tickle Me Elmo, whichever comes first :  |
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