Crown Audio P.I.P.-ATNb - Manual (Page 4)

Page 4
P.I.P.–ATNB
Fig. 2.3 Installation into a
Standard P.I.P. Amplifier
Fig. 2.1 Constant-Directivity Horn
Equalization (with RFI filter)
Fig. 2.2 Subsonic/Bass Filter Settings
2 Installation
Before installing this P.I.P. module, it
will need to be configured. The first
two steps in the installation proce-
dure focus on this. A phillips screw-
driver is required.
CAUTION: Before installing this or
any P.I.P. in your amplifier, it is impor-
tant to turn down the amplifier’s level
controls, turn off the amplifier and dis-
connect the AC power. Even though
the amplifier is off, there could still be
enough energy in the circuitry to
cause electric shock.
Please note: The RFI filter is always
on—it cannot be switched off.
1. Adjust the constant-directivity equal-
ization jumper of each channel to be
ON or OFF (see Figure 1.2). Figure
2.1 shows the frequency response
through the
P.I.P.–ATNB when this fil-
ter is on.
ter is set in each of its four modes
(Flat, 50 Hz, 100 Hz, 300 Hz).
3. Turn the Attenuator controls of the
P.I.P.–ATNB full counterclockwise to
∞
(full or infinite attenuation).
4. Turn down the amplifier level controls
(fully counterclockwise), turn off the
amplifier, and unplug it from the AC
power source.
5. Remove the existing P.I.P. module or
panel (two screws). For PIP2 amplifi-
ers, this may involve disconnecting
the
P.I.P. from a PIP2 input adapter
(see Figures 2.4 and 2.5). If a PIP2
input adapter is already present, do
not remove the ribbon cables from
the adapter. Otherwise you will have
to reconnect them in the next step.
6. Standard P.I.P. Amplifiers: Align the
edges of the
P.I.P.–ATNB in the P.I.P.
card rails and firmly push the unit in
until it is seated against the mount-
ing bracket (see Figure 2.3).
P.I.P.
MODULE
BACK PANEL
OF AMPLIFIER
2. Select the desired position for the
Subsonic/Bass filter switch for each
channel. Sliding the switch to the
FLAT position switches off the filter.
The switch positions are identified on
the circuit board between the two
switches (see Figure 1.2). Figure 2.2
shows the frequency response
through the
P.I.P.–ATNB when this fil-
100 1 K 10 K 20 K
FREQUENCY (Hz)
dB
+12
+6
0
– 6
HORN EQ
NO HORN EQ
10 100 1 K
FREQUENCY (Hz)
dB
0
–6
–12
–18
FLAT
50 Hz 100 Hz 300 Hz