B Tech B77 location for stereo L&R spkrs

[ststephen]

Hi,
I'm mounting a pair of M Audio AV40's as front L&R speakers to compliment an arm mounted 24" computer HD LCD AV system in a small 11'x11' Dental Treatment room. The BT 77's are the only show in town for these 15 lb spkrs, but I'm stuck with only 7 degrees downtilt. They will be mounted in a nearfield monitor position, 5' apart and triangulated to the seated patient about 4-5 ' away.
****What is the best height to mount them up the wall, as the user down tilt is insufficient to mount them at the dropped ceiling height (to hide the wires). I presume the answer is: at whatever height the tweeters will be, at ear level, with the spkrs at max down tilt?***Thanks.

 

[Warpdrv]

Welcome ststephen

The B-Tech's are nice mounts... I use them myself...

You are correct, the tweeters should be carefully aimed at the listeners ears as best you can, so mounting height should take that into consideration. Tweeters are quite directional.

If possible try to use a laser pointer to aid getting the best height.

 

[3db]

I use these mounts myself and liek them alot.

Like Warp mentioned, use a laser pointer..... I would tape it lightly to the side of the speaker at the height of the tweeter to help you find your mounting height.

 

[ststephen]

Thanks to all. I have a 24" laser level, though larger than a pointer, does project a beam & should work fine....like playing Miami CSI....

 

[ststephen]

This is a follow up to my Q asking about the correct mounting height:

I just realized that the speakers will have to image with the patient semi to fully reclined and looking up at the LCD, as well as in the normal seated position, facing forward. My 1st email asked for the correct position with the patient seated facing forward ONLY. The tilt/swivel arm mounted LCD will accomplish this for the video.

The speakers will require high wall mounting, positioned at an acute angle, 30-45 degrees downward, to image with the patient fully reclined, as well as seated upright, with the tweeters aimed at ear level.

1. Can an isoceles triangular shaped wood shim be made from a 2x4, used with 2-3" screws, and placed between the BT 77's wall mount plate and wall (stud), to angle the whole mount 30 degrees downward? I could then dial in an aditional 7 degrees from the mount

2. Can Auralex Mopads be used to increase the downward tilt by another 8 degrees? As the BT77's are side clamping with a screw hole which I will use. Can the mopads be safely used to create the additional tilt? Should an extention bracket be made to reach the cabinet to enable screw down, as the mounts sides are not high enough with the 1 1/4" - 2" high pads in place?

Pleas IM me for the links to: Btech, auralex and M audio, as I tried to post them, but can't do so until I have 5 posts on this site.

Thanks,
Steve

 

[Warpdrv]

I think your at a point of trial and error, I don't see why you can use the wood idea, not sure the Mopad would allow for the clamps to be useable on the sides of the speakers as you are thinking... too tall of foam...

I would compromise between the fully reclined and upright seating position and call it a day... should be more then adequate...

 

[corey]

The Btech mounts have small screw holes in them to fasten the speaker in. I don't use them with my 7 degree down 22 lb. speakers, but I sure would if you increase the angle with a shim. I'd also look into some sort of support on the top of the speaker.

Like Warpdrv said, get it the best you can & it should be fine - maybe just crank up the nitro a bit

For myself, I bring my own mp3 player & headphones if I'm going to be in a dental chair for a while.