6
A
second
consideration is for feedback and bass
performance. If the speaker is placed near a large, flat
wall, the bass output will increase by approximately 3
dB. Placing the speaker near a wall can cause
feedback. If this occurs, the speaker must be moved.
A
third
consideration is to what degree the speaker
should be "heard and not seen", especially in
permanent installations. Remember, where the
speaker cabinets are placed will affect both their tone
and radiating patterns.
For versatility and increased headroom, some users
may choose to use an active electronic crossover /
processor, such as the Fender PCN-2 or PCN-4, with
the system. The electronic crossover takes the place
of the internal crossover of the speaker system. The
"Normal / Bi-Amp" switch on the back of the cabinet
must be set to the "Bi-Amp" position.
Always check
to ensure the internal/external crossover switch
which selects passive or biamp operation is in the
correct position prior to use. Failure to do so may
damage the speakers.
A typical set-up of a bi-amp
configuration is shown at right.
For those situations requiring a subwoofer, HP
loudspeakers can still be used if a three-way electronic
crossover is used. An example of this configuration is
shown on the next page (7).
It is strongly recommended that a fourth-order
"Linkwitz-Riley" or a digital FIR fourth-order active
crossover be used. The crossover frequency for the
1225 HP should be set at approximately 2200 Hz.
Since the output sensitivity of the compression driver
is higher than that of the woofer, the high frequency
output of the system must be decreased at either the
crossover (if such a control is provided) or at the power
amplifier(s) that are used for the high frequencies.
CAUTION: Be sure to connect the high frequencies
and low frequencies to their correct inputs
indicated on the back of the speaker cabinets.
...
order your copy of “Making the Connection - The
Fender Pro Audio Primer”. Making the Connection is
available at your nearest authorized Fender dealer or
it may be ordered directly from Fender using the form
included with your new speakers.
1225HP cabinets are covered in a
tough, black indoor/outdoor synthetic
carpet for long life and lasting good
looks. To clean the carpet covering, use
a sponge and a light soapy water
solution to wipe away any smudges or
dirt. For stubborn stains, a slightly more concentrated
soapy solution or carpet shampoo with a brush may
be used. Avoid spilling liquids on the input panel, grille
and speakers.
BI-AMP OPERATION
CARPET COVERING CARE
MONITOR
OUT
MAIN
OUT
UNPOWERED MIXER
IN
LOW
OUT
HIGH
OUT
A In
A Out
SPL-9000
POWER AMP
PCN-2
ELECTRONIC CROSSOVER
B Out
B In
SWITCHES
SET TO
EXTERNAL
CROSSOVER
Speakers operated in a bi-amp configuration
1225HP
Cabinet
Hi
Low
Hi
Low
1225HP
Cabinet
SETUP SUGGESTIONS, CON’T.
FOR MORE STUDY...
