every Graphs fall at 12khz

**andychris** · **01-09-09, 12:49 PM**

hello
i try to use REW but I've got a probleme, every graphs are falling at 12khz. I've use 3 different microphone, 2 different preamp, 2 different sound card,,,,,but always the same probleme. i don't understand where can be the probleme.

I need help

**brucek** · **01-09-09, 01:23 PM**

Quote:

I've got a probleme, every graphs are falling at 12khz.

Not enough information. Can you post a graph so we can see what you are referring to?

Also post a graph of your soundcard calibration file.

What microphone and preamp are you using?

Also explain what and where you are measuring. Is it near field or listening position.....

brucek

**andychris** · **01-09-09, 01:28 PM**

ok I hope this helps,,,

**brucek** · **01-09-09, 01:44 PM**

Quote:

ok I hope this helps

Again, you haven't provided any information.

What are we looking at? Looks like peaks at 4K-8K.

Explain each line.

Normally all measurements are taken with a calibration level of 75dB.

Use a vertical scale of 45dB-105dB.

brucek

**tonyvdb** · **01-09-09, 01:56 PM**

Quote:

andychris wrote:

hello
I've use 3 different microphone, 2 different preamp, 2 different sound card

I agree, you need to tell us what microphones you are using as well as what pre-amp and sound card.
Without this information its tough to help you much more.

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