Calibrating two subs

[alton_1014]

Hello all,

This is my first thread here and I've been browsing this site for a few years now. I've gathered a lot of valuable information here.

My question is when calibrating two subs using your avr's built-in calibrating settup is it a good idea to calibrate both sub at the same time or do it individually? At this time i do not have an spl but i plan to get one very soon.

[neos_peace]

You wil get some execellent advise here. But form my 2 cents you will want to set each one seperatly depending on where you set them up so that way you get the same sound level form each. Then you will wat to run your calibration with them together. BUT i'm in no way the autharity on this. Big Daddy, and others will be along to give you way more and better advise.

[HAMP]

Originally Posted by alton_1014

Hello all,

This is my first thread here and I've been browsing this site for a few years now. I've gathered a lot of valuable information here.

My question is when calibrating two subs using your avr's built-in calibrating settup is it a good idea to calibrate both sub at the same time or do it individually? At this time i do not have an spl but i plan to get one very soon.

Individually is the way to go.

[Irrob]

This is all you need

https://forum.blu-ray.com/showthread.php?t=95817

[Fors*]

Originally Posted by Irrob

This is all you need

https://forum.blu-ray.com/showthread.php?t=95817

+1.....

[alton_1014]

Thank you all,

i was previously having trouble calibrating my two subs with the auto calibration because i would have to choose the 180 phase for one and it just didnt sound as good if both sub was using the same phase. Since then i have managed to figure it out.. I just ran the auto calibration today again and both subs were in phase using the 180. thank you all for the help

[Ventura]

Originally Posted by Irrob

This is all you need

https://forum.blu-ray.com/showthread.php?t=95817

I anticipate getting a new SVS soon, and the bit about turning each off while you adjust the level of the other is exactly what I was planning on doing. As it says, the trick with two is that you have to adjust the gain level on the back of each sub to have it match the 75dB, rather than adjusting the level on the receiver.

Actually, I'm telling a bit of a porky pie. I was planning on setting the new one up to about 80dB and the other one to about 72dB, as I want the new, more powerful of the two to be the dominant sub in the room. I will experiment with how this works though.

To be honest, I was more interested in reading about placement of two subs, and I think I'll start with middle of the right and left walls, and work from there. My room is awfully small however for all the equipment I've got in there, so my options re: placement are somewhat limited.

[Fors*]

Originally Posted by Ventura

I anticipate getting a new SVS soon, and the bit about turning each off while you adjust the level of the other is exactly what I was planning on doing. As it says, the trick with two is that you have to adjust the gain level on the back of each sub to have it match the 75dB, rather than adjusting the level on the receiver.

Actually, I'm telling a bit of a porky pie. I was planning on setting the new one up to about 80dB and the other one to about 72dB, as I want the new, more powerful of the two to be the dominant sub in the room. I will experiment with how this works though.

To be honest, I was more interested in reading about placement of two subs, and I think I'll start with middle of the right and left walls, and work from there. My room is awfully small however for all the equipment I've got in there, so my options re: placement are somewhat limited.

Just an FYI, but if you have issues with those locations, it is considerd a good idea when you have a more powerful sub to put that up in your front soundstage towards the corner and then the weaker sub in the back of the room at the opposite corner.

[Ventura]

Originally Posted by forsberg21

Just an FYI, but if you have issues with those locations, it is considerd a good idea when you have a more powerful sub to put that up in your front soundstage towards the corner and then the weaker sub in the back of the room at the opposite corner.

Yeah I noticed the guide said to have the stronger one at the front and the weaker closer to the seating position. I'll definitely give that a go and see how it works out; it's likely with my theatre room being kinda small anyway that the two will end up at opposite corners to each other.

[Fors*]

Originally Posted by Ventura

Yeah I noticed the guide said to have the stronger one at the front and the weaker closer to the seating position. I'll definitely give that a go and see how it works out; it's likely with my theatre room being kinda small anyway that the two will end up at opposite corners to each other.

Good luck, as it can take some tweaking to get the right balance....

[ryan4blu]

wow i was surprised today to hear from my tv calibrator who also does audio calibrating as well that having two subs is not always good to have. my room is 12' wide by 18' long and he said with my size i should only use one powered sub? see my sig for what i have now.

to be honest i enjoy having two subs, i think i have tweaked it well and it sounds awesome. atleast to me it does

anyways didnt know if anyone had thoughts on this? should i stick with two or downsize to one???

[Fors*]

Originally Posted by ryan4blu

wow i was surprised today to hear from my tv calibrator who also does audio calibrating as well that having two subs is not always good to have. my room is 12' wide by 18' long and he said with my size i should only use one powered sub? see my sig for what i have now.

to be honest i enjoy having two subs, i think i have tweaked it well and it sounds awesome. atleast to me it does

anyways didnt know if anyone had thoughts on this? should i stick with two or downsize to one???

As with anything regarding sub(s)....it comes down to location and what the sub may interact within the room. No two rooms are identical, but the option for 2 subs is usually a good rule to follow. I don't consider it gospel, but I put more faith that 2 subs are going to be better than 1 regardless of what someone sees. If he didn't actually hear your set-up, then he is basically making an assumption on what he knows and sees. The proof to me is what you hear......

[Big Daddy]

Originally Posted by ryan4blu

wow i was surprised today to hear from my tv calibrator who also does audio calibrating as well that having two subs is not always good to have. my room is 12' wide by 18' long and he said with my size i should only use one powered sub? see my sig for what i have now.

to be honest i enjoy having two subs, i think i have tweaked it well and it sounds awesome. atleast to me it does

anyways didnt know if anyone had thoughts on this? should i stick with two or downsize to one???

He should have his head examined. Just because he is a professional calibrator, it does not mean that he knows anything about subwoofers or the science of TV building. God knows how many times I have argued with dish satellite installers and sales people at retailers such as Best Buy or even high-end stores.

The science of bass waves requires knowledge of Physics and Math and most of the research was done under the drirection of Dr. Floyd Toole (a Ph.D in Audio Engineering) and his associates (more Ph.D.'s) at the National Resaerch Center in Ottawa, Canada. The NRC is one of the most respected research centers in the world.

[tilallr1]

Originally Posted by Big Daddy

He should have his head examined. Just because he is a professional calibrator, it does not mean that he knows anything about subwoofers or the science of TV building. God knows how many times I have argued with dish satellite installers and sales people at retailers such as Best Buy or even high-end stores.

The science of bass waves requires knowledge of Physics and Math and most of the research was done under the drirection of Dr. Floyd Toole (a Ph.D in Audio Engineering) and his associates (more Ph.D.'s) at the National Resaerch Center in Ottawa, Canada. The NRC is one of the most respected research centers in the world.

+1

Big Daddy is Yoda.

[jomari]

*ahem*

[ryan4blu]

Originally Posted by Big Daddy

He should have his head examined. Just because he is a professional calibrator, it does not mean that he knows anything about subwoofers or the science of TV building. God knows how many times I have argued with dish satellite installers and sales people at retailers such as Best Buy or even high-end stores.

The science of bass waves requires knowledge of Physics and Math and most of the research was done under the drirection of Dr. Floyd Toole (a Ph.D in Audio Engineering) and his associates (more Ph.D.'s) at the National Resaerch Center in Ottawa, Canada. The NRC is one of the most respected research centers in the world.

i think he made that comment based on the size of my room, that my paradigm 1500 wt sub was more than enough for the room. well this guy has 30+ years in the A/V business so i know he knows his stuff, maybe i just stated it wrong.

[Fors*]

Originally Posted by ryan4blu

i think he made that comment based on the size of my room, that my paradigm 1500 wt sub was more than enough for the room. well this guy has 30+ years in the A/V business so i know he knows his stuff, maybe i just stated it wrong.

So perhaps he meant that your current sub was more than enough for that room and you didn't need a second sub versus what we thought you meant that two subs are not a good idea and that one sub is simply a better idea?

[jomari]

it really depends most of the time. in the past a number of people who have had a nicely positioned sub would be satisfied with the performance. if they have the appropriate acoustics to help level out a room, then id consider it done. if, like most cases are, there are no bass traps, acoustic panels, et al, and 'complain' that one sub isnt doing their job, then you can even it out having two subwoofers...

its apples and oranges for each persons setup.

[ryan4blu]

Originally Posted by Fors*

So perhaps he meant that your current sub was more than enough for that room and you didn't need a second sub versus what we thought you meant that two subs are not a good idea and that one sub is simply a better idea?

yup that is what i meant i guess i worded it wrong, sorry.

[Fors*]

Originally Posted by ryan4blu

yup that is what i meant i guess i worded it wrong, sorry.

I understand now....I think it threw you so far off, that you were unable to think straight and word your post properly.