Blaupunkt Velocity V250 Owner's Manual page 15

FINAL INSTALLATION
Proper installation of your amplifier should also address several areas; adequate mounting and
ventilation, proper signal input interface, correct use of internal crossover networks, "clean"
power/ground wiring, proper fusing, and power/speaker wiring.
ADEQUATE MOUNTING AND VENTILATION
Inevitably this amplifier will be mounted in locations with limited space.
the amplifier on a vertical surface with the fins up/down for best vertical air movement. The
mounting screws supplied with this unit should be used for the most secure installation.
SIGNAL INPUT INTERFACE
This amplifier can accept input signals up to 6 volts rms over the RCA input jacks.
input signal capabilities, people may want to interface the high level output of a radio (2-4 Vrms) to
the input of the amplifier. This can be easily done by connecting the " + " lines of the two speaker
outputs to the center conductors of the RCA jacks. One common signal ground reference wire is
then connected from the radio chassis to the shields of the RCA lines connecting to the amplifier
input.
USE OF INTERNAL CROSSOVERS AND TONE CONTROLS
Internal active crossover networks allow for this amplifier to be configured in three possible modes;
OFF (FULL-RANGE) disables the crossover so fl frequencies pass through the amplifier, HP (HIGH-
PASS) passes only frequencies above the crossover control setting, and LP (LOW-PASS or
SUBWOOFER) passes only frequencies below the crossover control setting. In the LP
at the higher end of the control ((9220 Hz), the slope approaches 24 dB/octave. This prevents
male voices from sounding bad if the control setting is set up around the 220 Hz value.
LP (LOW PASS) CROSSOVER
100
20
200
If possible, try mounting
"LOW LEVEL AUDIO"
LEADS
HP (HIGH PASS) CROSSOVER
-3
-12
-24
20
Due to high
+ L - +R-
200 500
100
15