or Connect
AVS › AVS Forum › Audio › Subwoofers, Bass, and Transducers › Did you measure your sub with measurement gear ??????
New Posts  All Forums:Forum Nav:

Did you measure your sub with measurement gear ?????? - Page 3

Poll Results: Did you use measurement gear to setup your subwoofer

 
  • 80% (40)
    Yes
  • 20% (10)
    No
50 Total Votes  
post #61 of 81
By all means, please, help. Since we're communicating via the Web, I just want to make sure I'm getting it right by understanding the intent of your questions and at the same time maintain cooperation with your input.

What's the benefit of playing a test tone at 85dB or 95dB as opposed to 75dB? An answer to that question will help me better understand if things are or are not set correctly and will allow me to better understand what it is that you're trying to bring to my attention.

FWIW, in the case of REW, the onscreen SPL meter shows 75dB as the graph shows a lower SP and REW has been calibrated to reflect my sound meter readings. I don't know the why of it all regarding the graph/gauge discrepancy. Maybe someone else can respond as to what's happening.
post #62 of 81
I think the big point you are missing is you are playing a test tone from the receiver, which is fine to get a one time spl reading but you are showing a frequency sweep plot which really beats no meaning and doesn't in any way show the response of your room.
post #63 of 81
Quote:
Originally Posted by primetimeguy View Post

I think the big point you are missing is you are playing a test tone from the receiver, which is fine to get a one time spl reading but you are showing a frequency sweep plot which really beats no meaning and doesn't in any way show the response of your room.

He's not using the REW sweeps?
post #64 of 81
Quote:
Originally Posted by primetimeguy View Post

I think the big point you are missing is you are playing a test tone from the receiver, which is fine to get a one time spl reading but you are showing a frequency sweep plot which really beats no meaning and doesn't in any way show the response of your room.

Then at this time and point I'm in trouble as based on provided documentation, I can't figure out how to switch to the front plate inputs so as to get a sweep signal to the speaker system.

Quote:
Originally Posted by sputter1 View Post

He's not using the REW sweeps?

I've commented on this point several times regarding my frustration in not being able to get the output to play through the AVR so no, I'm not using REW provided sweeps. Yes, I've put forth effort reading the provided online documentation in my efforts to get the front plate input switched on.

It would be nice if this was a movie set as those characters can switch on a jungle installation that's been shut down and abandoned for decades, with the flip of a single switch.

-
Edited by BeeMan458 - 12/21/12 at 5:39am
post #65 of 81
Quote:
Originally Posted by BeeMan458 View Post

Quote:
Originally Posted by primetimeguy View Post

I think the big point you are missing is you are playing a test tone from the receiver, which is fine to get a one time spl reading but you are showing a frequency sweep plot which really beats no meaning and doesn't in any way show the response of your room.

Then at this time and point I'm in trouble as based on provided documentation, I can't figure out how to switch to the front plate inputs so as to get a sweep signal to the speaker system.

If you're using the pink noise from your avr then that's wrong.and explains some of the errors in your measuring.

You're using the inputs in the front of avr?
What are they labled, eg video2 or somesuch.
You need to change your avr input to reflect the same as the front label.
post #66 of 81
Quote:
Originally Posted by sputter1 View Post

If you're using the pink noise from your avr then that's wrong.and explains some of the errors in your measuring.

Not being stubborn but the graph is a snapshot of the realtime information.
Quote:
You're using the inputs in the front of avr?
What are they labled, eg video2 or somesuch.
You need to change your avr input to reflect the same as the front label.

Yes I am.

They're labeled as "Aux."

Which I've tried. And when I go into the switching menu, nothing makes sense and the directions don't do a thing to make things any clearer.

Agreeing with you, it should be no more difficult then going into the switching menu and telling the AVR to accept input from the front "Aux" plugs. I've recently read the online manual, several times and I can find the graphic with points to the front plate inputs and the directions say nothing more. Usually there's an annotation telling the reader where there's more information in the manual but in this case, no such luck. I've keyed through some hundred and sixty-two pages and nada.

I've gone into the menu and all I have are digital input choices. I've set the detect to analogue and to auto detect and nada. Very frustrating as I know it's just a simple click away from salvation from my ignorance. tongue.gif

(I know there's a switch here somewhere.)

(This isn't hard. You can do this.)

(Let's see, logic says if you try this then this.....nada)

(krap, I hope I don't forget where I'm at and lunch everything up)

(Okay, flip this menu, click this operation, click....this should do it.....nada)

That sort of thing.
post #67 of 81
Quote:
Originally Posted by BeeMan458 View Post

Quote:
Originally Posted by sputter1 View Post

If you're using the pink noise from your avr then that's wrong.and explains some of the errors in your measuring.

Not being stubborn but the graph is a snapshot of the realtime information.
Quote:
You're using the inputs in the front of avr?
What are they labled, eg video2 or somesuch.
You need to change your avr input to reflect the same as the front label.

Yes I am.

They're labeled as "Aux."

Which I've tried. And when I go into the switching menu, nothing makes sense and the directions don't do a thing to make things any clearer.

Agreeing with you, it should be no more difficult then going into the switching menu and telling the AVR to accept input from the front "Aux" plugs. I've recently read the online manual, several times and I can find the graphic with points to the front plate inputs and the directions say nothing more. Usually there's an annotation telling the reader where there's more information in the manual but in this case, no such luck. I've keyed through some hundred and sixty-two pages and nada.

I've gone into the menu and all I have are digital input choices. I've set the detect to analogue and to auto detect and nada. Very frustrating as I know it's just a simple click away from salvation from my ignorance. tongue.gif

(I know there's a switch here somewhere.)

(This isn't hard. You can do this.)

(Let's see, logic says if you try this then this.....nada)

(krap, I hope I don't forget where I'm at and lunch everything up)

(Okay, flip this menu, click this operation, click....this should do it.....nada)

That sort of thing.

What AVR are you using?
post #68 of 81
Quote:
Originally Posted by sputter1 View Post

What AVR are you using?

A Marantz, SR5007.

In the online manual, the assignment directions are on page 117 or on the pdf list, page number 120.

-
Edited by BeeMan458 - 12/21/12 at 6:27am
post #69 of 81
Quote:
Originally Posted by BeeMan458 View Post

Quote:
Originally Posted by sputter1 View Post

What AVR are you using?

A Marantz, SR5007.

Off the top of my head, one dial is volume right? the other should be a input selector.
post #70 of 81
Quote:
Originally Posted by BeeMan458 View Post

Quote:
Originally Posted by sputter1 View Post

If you're using the pink noise from your avr then that's wrong.and explains some of the errors in your measuring.

Not being stubborn but the graph is a snapshot of the realtime information.
Quote:
You're using the inputs in the front of avr?
What are they labled, eg video2 or somesuch.
You need to change your avr input to reflect the same as the front label.

Yes I am.

They're labeled as "Aux."

Which I've tried. And when I go into the switching menu, nothing makes sense and the directions don't do a thing to make things any clearer.

Agreeing with you, it should be no more difficult then going into the switching menu and telling the AVR to accept input from the front "Aux" plugs. I've recently read the online manual, several times and I can find the graphic with points to the front plate inputs and the directions say nothing more. Usually there's an annotation telling the reader where there's more information in the manual but in this case, no such luck. I've keyed through some hundred and sixty-two pages and nada.

I've gone into the menu and all I have are digital input choices. I've set the detect to analogue and to auto detect and nada. Very frustrating as I know it's just a simple click away from salvation from my ignorance. tongue.gif

(I know there's a switch here somewhere.)

(This isn't hard. You can do this.)

(Let's see, logic says if you try this then this.....nada)

(krap, I hope I don't forget where I'm at and lunch everything up)

(Okay, flip this menu, click this operation, click....this should do it.....nada)

That sort of thing.



How about selecting the aux button on your remote control? You know, like when you select the CD input!
post #71 of 81
Quote:
Originally Posted by BeeMan458 View Post

Quote:
Originally Posted by sputter1 View Post

What AVR are you using?

A Marantz, SR5007.

In the online manual, the assignment directions are on page 117 or on the pdf list, page number 120.

-

There is a 'input source" button on the remote. select aux from there.
post #72 of 81
Quote:
Originally Posted by sputter1 View Post

Off the top of my head, one dial is volume right? the other should be a input selector.

Correct. The left dial is volume and the right is input. I've been using the onscreen menu to do the switching. This is page number 117 of the online manual.

It's still dark and the house is still asleep, when things wake up, I'll start banging away on this issue again.
post #73 of 81
page 34
post #74 of 81
Quote:
Originally Posted by sputter1 View Post

page 34

Got it. Thanks! It's at the remote control level.

When reading the manual doesn't work. biggrin.gif

I'll give it a try when the house wakes up.

House is awake, plugged the patch cord into the front headphone out, plugged the patch cord into the front plate of the AVR, changed the input to "Aux" and voila, music.

Thanks. In a bit. I'll play and graph some REW provided sweep tones.

(How to make yourself look stupid.....tell the whole flipping world you don't where the on switch is located.) tongue.gif

(Being delayed by snow duties. Currently there's a blizzard going on outside.)

-
Edited by BeeMan458 - 12/21/12 at 10:05am
post #75 of 81
Well, I'm up and running with REW signals going through the AVR.

Now I hate the subs cause the results of the spectrograph generated, based on REW tone sweeps are so bad.

The good news, it's allowed me to directly see the extent of change the phase control creates so due to what REW is letting me see, the best is being gotten out of this pair of subs. This is day two of being active with REW and I look forward to more playing with REW tomorrow so as to extract the most one can get out of these subs. Due to REW, I'm encouraged to replace one of the subwoofer drivers to see what type of measurement changes a new driver will cause.

Not exactly DIY as what I'll be doing is remove and replace using this subwoofer driver.

REW has brought about the awareness of abandonment; abandon hope all ye who do not use a RTA. tongue.gif

-
Edited by BeeMan458 - 12/22/12 at 9:12pm
post #76 of 81

^^^^^

Glad you got it working!!!

 

Before trying different drivers have you tried difference positions of the subs in your room?

post #77 of 81
Quote:
Originally Posted by BeeMan458 View Post

Well, I'm up and running with REW signals going through the AVR.
AWESOME!
Quote:
Originally Posted by BeeMan458 View Post

Now I hate the subs cause the spectrograph and tone sweep are so bad.
Doesn't it measure the way you "visualized" it? confused.gif
Quote:
Originally Posted by BeeMan458 View Post

The good news, it's allowed me to directly see the extent of change the phase control causes so the best is being gotten out of this pair of subs.
Being able to "see" the response is a function of measurements, not imagination. I'm glad to see you realize this now.

Craig
post #78 of 81
Quote:
Originally Posted by primetimeguy View Post

^^^^^
Glad you got it working!!!

Before trying different drivers have you tried difference positions of the subs in your room?

In this case, no disrespect intended towards your above, but moving the sub around the room would be akin to putting lipstick on a pig. eek.gif The graphs are with Anti-Mode set to bypass. Based on yesterday's efforts, I'll be playing with Anti-Mode today and hopefully, for comparison, I'll remember to post the graphs with Anti-Mode engaged.

.........

Based on the above spectrograph and X-Y graph, all speaker crossover settings have been set to 60Hz which all the speakers are easily good to go with.

As to real issues surrounding sub placement, our room is limited by the WAF. Our compromise, pretty much, within the world of rational, I get to do and buy what I want and she gets a normal looking living room; as much as sticking a boatload of speakers in a room, will allow. As to drivers, the whole driver thing is for edification purposes. Swap the driver and then measure for the differences. See it in the light of buying a two hundred dollar bottle of Bourbon (Parker's Heritage Collection), just for the tasting experience, advancing one's awareness in the process.

If you're going be driven out of Paradise, you might as well go happy. tongue.gif

Doing the driver swap thing will encourage me to explore subwoofer box design as according to what others have posted, this driver is spec'd for a 3.3^3 ported body and it's going be placed in an ~2.75^3 ported body. In my case, it's about the entertainment value. Like a cat playing with a ball of yarn. In this case, the ball of yarn is a random subwoofer driver. tongue.gif

-
Edited by BeeMan458 - 12/23/12 at 10:42am
post #79 of 81
I cleared the slate and started from the beginning. Audyssey settings were removed, the sub's phase was balanced using the continuous phase control feature, ran Anti-Mode and then ran Audyssey. Here are the results for comparison with the above graphs, no boost filters in place. This is what a pig looks like with lipstick on. My opinion, this is as good as this pair of subs is capable of. I also believe one of the eighteen year old subwoofer drivers is old, worn and in need of being put out to pasture.

The sub is spec'd; 28 - 120Hz.

............

The X-Y graph is 5dB.

For the time being, I'm done. Over and out.

-
Edited by BeeMan458 - 12/24/12 at 8:29am
post #80 of 81
Thread Starter 
just though i'd resurrect this thread, anything new in the world of testing
post #81 of 81
No, pretty much, measuring is still a harsh mistress that leaves everybody wanting more. Hasn't changed. tongue.gif

The room measure graph has improved greatly so that's always a good thing.

Personally, we've recently added a third sub to help with room modes and the mid-bass slam has improved greatly. The lighting in FOTP was an absolute delight.

I'm still fighting a monstrous null created by a support wall which I cannot get rid of. Maybe I can sneak some room treatments into the room and the wife won't notice.

How about with you? What's cooking?
New Posts  All Forums:Forum Nav:
  Return Home
AVS › AVS Forum › Audio › Subwoofers, Bass, and Transducers › Did you measure your sub with measurement gear ??????