BOXLIGHT MP-25t - Manual (Page 17)

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CONNECTING AN EXTERNAL SPEAKER
CONNECTING TO THE EXT. SP. JACK (3.5mm mini stereo type)
This jack outputs stereo speaker sound which viewing on screen. If you use external speaker system, connect stereo type
external speaker jack. Internal speaker sound is disconnected when speaker jack is connected.
COMPUTER IN 1 COMPUTER IN 2 MONITOR OUT
EXT. SP CONTROL PORT 2 CONTROL PORT 1 AUDIO 2
(STEREO) (STEREO)
AUDIO 1
(STEREO)
(8 Ω)
AV IN
AUDIO VIDEO VIDEO S-VIDEO (MONO)
MONITOR OUT
R L AUDIO R L
EXTERNAL
SPEAKER SYSTEM