Alpine S2-A55V Owners Manual - Page 11

SWITCH SETTINGS • Before switching each Selector Switch, turn off the power and insert a small screwdriver, etc., perpendicularly to the Switch. S2-A36F S2-A55V Input Level and Turn-on Type Switch a) If input is via the head unit speaker line using a speaker-RCA conversion cable (sold separately), set to "HI". TURN-ON TYPE "DC": Power is turned on by the "REMOTE SENSING" function when DC offset is detected. b) If input is via the head unit speaker line using a speaker-RCA conversion cable (sold separately), set to "HI". TURN-ON TYPE "REM": Power is turned on by the remote turn-on lead. c) If input is via the head unit pre-out line using an RCA extension cable (sold separately), set to "LO". TURN-ON TYPE "REM": Power is turned on by the remote turn-on lead. • The DC offset auto turn-on circuit was designed to work with ONLY high level signals (i.e., speaker level signals). These high level signals usually come from the amplified output of radios, head units, and amplifiers. Because LO signal input (i.e., low level signals) cannot turn on the amplifier, the REMOTE trigger signal must be supplied and the REM setting needs to be used for LO signal input.* * For details on turning on the unit with the ACC trigger signal, see the Remote Turn-On Lead ( ) section (page 6). Input Gain Adjustment Control Set the S2-A36F/S2-A55V input gain to the minimum position. Using a dynamic CD as a source, increase the head unit volume until the output distorts. Then, reduce the volume 1 step (or until the output is no longer distorted). Now, increase the amplifier gain until the sound from the speakers becomes distorted. Reduce the gain slightly so the sound is no longer distorted to achieve the optimum gain setting. 9-EN