NTi Audio Acoustilyzer AL1 - Manual (Page 11)

10 11
Connectors
On top of the AL1, three connectors as well as the internal microphone are
located:
• The XLR and RCA inputs allow a signal to be fed into the AL1.
We recommend using the XLR input for best performance (minimum
noise floor and best dynamic range). In case a measurement
microphone with unbalanced output is used, connect to the XLR-
input between pin 2 and 3.
• A 3.5 mm (1/8“) jack headphone monitor output is used to monitor
the electrical input signal.
• The internal microphone is used to test the polarity of loudspeakers
and for delay time measurements. SPL measurements are not
supported with this internal microphone.
XLR & RCA
Inputs
Monitor
Output
Internal
Microphone
Note: Never connect the XLR- and the RCA input at the same time!