Velocity V450 User Manual - page 9
AMPLIFIER CONNECTIONS AND INTERFACE
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.
3.
4 .
5.
6.
7.
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.
BATTERY LINE A high current, fused line should be connected at this point with battery level
voltages (typical 12.5 14.5 V DC) available 24 hours a day.
FUSES These fuses are only for catastrophic situations should the amplifier begin to 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.
REMOTE CONTROL INPUTS This amplifier has the capability to have its gain changed from a
remote gain control (optional) and uses a standard 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.
LEFT FRONT RIGHT FRONT MONO
INPUTS These lines connect to the RCA output
jacks of a radio, or directly from the high level audio outputs from a radio. In the 4 and 3
channel modes these are LF & RF. In the 2 channel mode the input marked MONO A drives the
MONO A output (left channel in the two channel mode).
LEFT REAR RIGHT REAR MONO
INPUTS These lines connect to the RCA output jack
of a radio, or directly from the high level audio outputs from a radio. In the 4 channel mode,
these inputs are LR RR. In the 3 channel mode, the input marked MONO B is the third
(bridged) channel. In the 2 channel mode, the input marked MONO B drives the MONO B
output (right channel in the two channel
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
lead of the left channel is not electrically connected to the
lead of the right channel so common
cannot be used). Speaker wire gauges of up
to 8 gauge in size can be accommodated by these terminals.