IBM iL2120 User Manual page 46

Input impedance
Maximum input voltage
Sensitivity
Connector type
Accessories
There are many accessories available for your projector and new ones being
added frequently. Please refer to http://www.infocus.com/ and select from
the many accessories listed there for purchase.
36
iL2120 IBM Value Data/Video Projector, iL2220 Conference Room Data/Video Projector: User's Guide
10K ohm nominal, ac coupled
(LIN + RIN)PEAK < 4.5 V for THD ≤ 0.3%
LIN or RIN < 2.0 Vrms for THD ≤ 0.3%
100 mV at 1 kHz for 88 dB SPL at 1 meter
3.5 mm (.125 inch) stereo phone mini