NTi Audio XL2 Sound Level Meter - Manual (Page 94)

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Delay Time
Store Reference
Select the displayed • 0.0 ms below Act. Delay with the rotary
wheel and press enter .

The reference result of speaker A is stored for the differ-
ence calculation of delay A - B.
Stop the delay test signal at speaker A. •
Measure Sub Speaker B
Start the delay test signal at speaker B. Mute speaker A. •
Position yourself with the XL2 at the shown measurement •
position. The XL2 uses the VoiceNote microphone for the de-
lay test; do not connect any measurement microphone.

The XL2 measures the delay time of speaker B in reference
to the electrical input signal in milliseconds.