Amplifier Connections And Interface - Blaupunkt Velocity V250 Owner's Manual

AMPLIFIER CONNECTIONS AND INTERFACE

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1. GROUND LINE - This is the high current ground connection to the chassis of the car. It should
be fastened to a clean ground connection in the car, capable of handling high current loads. Do
not run a wire up to the car battery ground for this line. It should remain less than 3 feet in
length (1 meter).
2. TRIGGER LINE - This connection is the connection point that allows the amplifier to be
switched on from a remote location (usually the radio). When a positive voltage is applied to
this terminal the amplifier will switch on. This connection is normally made from the power
antenna lead of the radio or a dedicated trigger line. It will turn the amp on for any voltage
above 10 volts. Make sure the radio's power antenna lead is activated only when the radio is
turned on.
3.
voltages (typical 12.5 - 14.5 V DC) available 24 hours a day.
4 . FUSE - This fuse is only for catastrophic situations should the amplifier self destruct. Another
fuse should be located at the battery before a run of wire is run the length of the car to the
remote location of the amplifier.
5. REMOTE CONTROL INPUT/OUTPUTS - This amplifier has the capability to have its gain
changed from a remote (optional) gain control and uses a common RJ-11 telephone jack for
interface. Should more than one amplifier be used in an installation, you can "daisy chain"
these controls together using simple telephone cables so all amps move their gains up and
down in tandem.
6. LEFT/ RIGHT RCA LINE INPUTS - These lines connect to the RCA output jack of a radio, or
directly from the high level audio outputs from a radio. These connectors are gold plated for
superior audio transmission and to prevent corrosion over time.
7. LOOP-THRU RCA CONNECTORS - Should additional amplifiers be used in an installation, you
can simply loop through the RCA signals such that the same audio signal is present at multiple
amplifiers. This connection is electrically "hard wired" inside the amp so there is no signal
modification possible.
a.
SPEAKER OUTPUTS - These connections are used to connect loudspeakers with 1 ohm or
higher speaker impedance. It is imperative that these lines NOT,be connected or touch the
chassis of the car in any way (the (-1 lead of the left channel is not electrically connected to the
to 8 gauge in size can be accommodated by these terminals.