Adjusting Gain; Adjusting Crossover Frequency; Remote Punch Level Control - Rockford Fosgate Prime R250-4 Installation & Operation Manual

Adjusting Gain

1. Turn amplifier gains to minimum (counter-clockwise).
2. Turn the source unit volume up to 7/8 maximum (or when distortion
is just inaudible).
3. Slowly increase amplifier gain control until adequate volume is
achieved.
NOTE: Best signal to noise and dynamic range are realized with gain set to
minimum. For a more in depth setting procedure, contact Rockford Tech-
nical Support.

Adjusting Crossover Frequency

Placing the crossover switch in the HP position sets
the amplifier to the 80hz High Pass mode, enabling
frequencies above the cut-off point to pass.
Placing the crossover switch in the AP position sets
the amplifier to the All Pass mode, preventing any
crossover adjustment, allowing all frequencies to
pass.
Placing the crossover switch in the LP position sets
the amplifier to the Low Pass mode, enabling fre-
quencies below the cut-off point to pass, adjustable
between 50-250Hz.Turn the crossover adjustment
knob all the way down.With the system playing, turn
the crossover adjustment knob up slowly until the
desired crossover point is achieved. A good place
to start is at about 80Hz.
10
Avoid setting amplifier gain high as noise and
distortion will greatly increase.
Punch Bass
This works along with the crossover switch on the amplifier. When set to
Low-Pass (LP) operation, this is a variable Bass Boost. Set this to your
personal preference while listening to the system.
dB
illus.-3.1

Remote Punch Level Control

When connected, the "Gain Control" is linked and allows you to remotely
control the output level of the amplifier from the dash or center console.
illus.-3.2
Over excursion and subsequent damage may
occur at high levels of boost.
illus.-5.1