alan
New Member
Posts: 21 
|
Post by alan on Sept 15, 2016 18:10:10 GMT
On another forum, these speakers came up in a discussion of room treatments needed in a users home setup. He said these speakers sound best in the corners. I was surprised and did some fishing and lo and behold we have this stereophile review that states the designer made them that way, to sound best in corners for "maximum bass reinforcement". The reviewer said he measured flat down to 25hz with speakers in the corners. This makes no sense to me with everything I've learned here and elsewhere. What do ye think? Is this "good" bass, reinforced by wall boundaries? Do you suspect some generous averaging going on in these measurements? Or am I missing something? |
|
|
|
Post by Hexspa on Sept 16, 2016 4:04:01 GMT
It's a complicated topic that I don't fully understand but
it comes down to an interaction between the speakers' design and the boundaries they interact with.
Essentially, if a speaker is designed to be mounted in the wall, that's probably the best solution.
Barring that, placing a speaker close to a boundary is preferable.
It has something to do with moving the constructive and destructive interference
higher up in the audio band so that acoustic treatment can be more effective.
This is because the effective frequencies of SBIR (speaker-boundary interference response)
are a function of distance.
To summarize, you either want your speaker in, very far from or very near to boundaries - in that order; it's the in-between that causes problems.
-m
|
|
|
|
Post by rock on Sept 16, 2016 12:10:49 GMT
Yes, boundaries (walls) can and will a reinforce low frequencies. Some speakers are designed to exploit this. If you want to, you can experiment and hear the difference with ANY full range speaker. If you place the speaker a few feet away from the walls and on a stand you get the least reinforcement (whole space). Put it on the floor (or push the speaker on the stand against the wall) you get a "1/2 space" and and increase in bass. If you place the speaker on the floor AND up against the wall (Floor/wall corner in the middle of the wall) you get a "1/4 space" and an additional bass increase. Now, if you place the speaker in a corner where 2 walls meet the floor, you get a "1/8 space" and the maximum bass reinforcement. Some speakers have built in bass roll-off to compensate for the above possible positionings of the speaker. Since your speaker is designed to be a "corner speaker", put it in the corner. The following is regarding room treatment. This is in response to Trdat's post and I did not notice the OP is actually Alan. Trdat was asking about traps behind speakers and I mistook this post as his. So Alan, the following suggestions may or may not be pertinent to your situation. Trdat, I don't know about your speakers and your exact situation either so the following may or may not help you either. As far as trapping in those same corners, I imagine it will influence the response but I don't know exactly how, I suggest you experiment and temporarily place panels in various configurations and measure the response with REW to see if there is a difference and choose the flattest response. I'm assuming these are floor standing "1/8" corner speakers. As far as I can tell, your options are 1. no trapping the speaker corners, 2. traps across the corner above the speaker or 3. traps in an "L" above the speaker. With the rest of your room treatment in place, these tests will help you decide. www.prosoundtraining.com/site/wp-content/uploads/2012/03/VOL36_DEC08_Boundaries-1.pdfCheers, Rock |
|
|
|
Post by Hexspa on Sept 16, 2016 14:28:12 GMT
Yes, boundaries (walls) can and will a reinforce low frequencies. Some speakers are designed to exploit this. If you want to, you can experiment and hear the difference with ANY full range speaker. If you place the speaker a few feet away from the walls and on a stand you get the least reinforcement (whole space). Put it on the floor (or push the speaker on the stand against the wall) you get a "1/2 space" and and increase in bass. If you place the speaker on the floor AND up against the wall (Floor/wall corner in the middle of the wall) you get a "1/4 space" and an additional bass increase. Now, if you place the speaker in a corner where 2 walls meet the floor, you get a "1/8 space" and the maximum bass reinforcement. Some speakers have built in bass roll-off to compensate for the above possible positionings of the speaker. Since your speaker is designed to be a "corner speaker", put it in the corner. The following is regarding room treatment. This is in response to Trdat's post and I did not notice the OP is actually Alan. Trdat was asking about traps behind speakers and I mistook this post as his. So Alan, the following suggestions may or may not be pertinent to your situation. Trdat, I don't know about your speakers and your exact situation either so the following may or may not help you either. As far as trapping in those same corners, I imagine it will influence the response but I don't know exactly how, I suggest you experiment and temporarily place panels in various configurations and measure the response with REW to see if there is a difference and choose the flattest response. I'm assuming these are floor standing "1/8" corner speakers. As far as I can tell, your options are 1. no trapping the speaker corners, 2. traps across the corner above the speaker or 3. traps in an "L" above the speaker. With the rest of your room treatment in place, these tests will help you decide. www.prosoundtraining.com/site/wp-content/uploads/2012/03/VOL36_DEC08_Boundaries-1.pdfCheers, Rock nice link |
|
