View Full Version : calibrating sub more precise?


mrcoop
11-17-08, 03:12 PM
I have calibrated my sub but am curiuos is there a way to calibrate it more precise. I think I have it set about 3db's high but the spl meter bounces around when I use the pink noise to calibrate the sub with the other speakers. Is this normal when calibrating the sub or can I get it a little more precise to the +3db reading.

Thanks

spyboy
11-17-08, 03:46 PM
I have calibrated my sub but am curiuos is there a way to calibrate it more precise. I think I have it set about 3db's high but the spl meter bounces around when I use the pink noise to calibrate the sub with the other speakers. Is this normal when calibrating the sub or can I get it a little more precise to the +3db reading.

Thanks

Are you using a Radio Shack SPL meter? If so, make sure it is set to "Slow".

mrcoop
11-17-08, 03:57 PM
Yes I am and it is set to slow. Readings on the speakers are accurate, the sub is the one that bounces all around. I am assuming the lower frequencies are harder to determine proper db's. Would using a test disc be better when calibrating the sub? Not sure how that works...

weverb
11-17-08, 05:32 PM
You can use REW (Room EQ Wizard) to compare its response to the mains.

You can also try going up one setting (80 versus 70) on the RS meter and see if that reduces the needle movement.

Illah
11-17-08, 06:18 PM
I think the warbles will always jump around. My understanding is the warbles are typically fluctuating randomly between 40-80Hz, so every now and then the waves will slightly reinforce or cancel each other out as the bounce around your space.

Just let it warble for a good 10-20 seconds and kind of mentally 'average' the levels. Also don't worry too much about the measurements being absolutely precise - a few dB won't really make a perceptible difference in the sound, especially in the lower frequencies where our ear is less sensitive to the details.

--Illah

sivadselim
11-17-08, 07:11 PM
I think the warbles will always jump around. My understanding is the warbles are typically fluctuating randomly between 40-80Hz, so every now and then the waves will slightly reinforce or cancel each other out as the bounce around your space.

Just let it warble for a good 10-20 seconds and kind of mentally 'average' the levels. Also don't worry too much about the measurements being absolutely precise - a few dB won't really make a perceptible difference in the sound, especially in the lower frequencies where our ear is less sensitive to the details.

--IllahI'm not sure what "warbles" you are talking about or how your DVE's tones work, but I do not think the OP is describing a tone that "warbles".

JBLsound4645
11-17-08, 07:14 PM
LOL you need an RTA or REW and SPL db metre will be light-years off.