White or pink noise for REW calibration?

**Chrisbee** · **08-01-06, 04:50 AM**

Hi

Can anyone suggest why the REW speaker calibration level (white?) noise is different to the sub calibration level (pink?) noise.

Thanks

**brucek** · **08-01-06, 06:46 AM**

Quote:

Can anyone suggest why the REW speaker calibration level (white?) noise is different to the sub calibration level (pink?) noise.

They're both pink noise, but filtered differently.
John says:
The Speaker Calibration option applies 2nd order (40dB/decade) filters at 500Hz and 2kHz, producing a signal with its energy centred on 1kHz. Subwoofer Calibration applies filters at 30Hz and 80Hz. Both are broadly in line with the THX test signal recommendations.

brucek

**Chrisbee** · **08-01-06, 06:57 AM**

Thanks brucek

This question came up on another forum in discussion of REW.

I hope you don't mind me directly quoting you over there.

Regards
Chris

**brucek** · **08-01-06, 08:29 AM**

Quote:

I hope you don't mind me directly quoting you over there

No problem..........hopefully you let it slip where the shack is located...

brucek

**Chrisbee** · **08-01-06, 08:36 AM**

As often as possible!

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