Fender 1272X eBook Reader User Manual

1272X / 1275X
Loudspeaker
Monitor Systems
Reference / Owner’s Manual
for 1272X /1275X
P/N 053996 REV A
Fender Musical Instruments
7975 North Hayden Road, Scottsdale, Arizona 85258 U.S.A.
A Message from the Chairman
At Fender, we know the importance of sound reinforcement. From the simple
box-top powered mixer to today’s touring concert systems, the need to
communicate to make the connection between the performer and the
audience is foremost in our mind.
Perhaps no other piece of gear can make or break your message or your band’s
sound than your sound reinforcement gear. Your sound system is far more than
just a combination of dials, wires and speakers. It is an integral part of the audio
chain and should be treated with special care and attention to detail.
Fender knows what building quality musical instruments and sound
reinforcement equipment is all about. In fact, many of the world’s best
sounding electric musical instruments and sound reinforcement equipment
proudly wear the Fender name.
Whether you need a small powered mixer for your Saturday afternoon “jam” or
a professional full-size concert system, Fender has the sound reinforcement
gear to meet your needs. Likewise, your decision to purchase quality Fender
Professional Audio Equipment is one you will appreciate with each
performance for years to come.
Wishing you years of enjoyment and a heartfelt thank you,
Bill Schultz
Bill Schultz
Chairman of the Board
Fender Musical Instruments Corporation
1272X / 1275X
LOUDSPEAKER MONITOR
SYSTEMS
INTRODUCTION
All Wood Construction with Sturdy
Dado Joints
Thank you for your purchase of a 1272X / 1275X
loudspeaker monitor system from Fender® Pro Audio.
We are sure you will find it both a unique and effective
sound reinforcement product, providing years of
trouble-free service day in and day out.
High Current 1/4” Phone Jacks
1272X / 1275X loudspeaker monitor systems are
professional, full-range, two-way, compact
loudspeaker monitors designed for both permanent
or portable sound reinforcement requirements. With
a wide response, low distortion and controlled
directivity, 1272X / 1275X loudspeaker monitor
systems are designed to form the basis of everything
from a small public address system to the nightly
rigors of a “working band’s” sound system. After
moisture sealing, the 1272X / 1275X loudspeaker
monitor systems are covered in tough black
indoor/outdoor synthetic carpet covering. Likewise,
1272X / 1275X loudspeaker monitor systems also
feature metal corners and rubber feet for a longer life
and lasting looks.
Metal Corners and Rubber Feet
Level Control for Adjusting Levels at
the Cabinet
Three Angles of Orientation: 30º, 60º
and Vertical for Side Fill Use
Tough Indoor / Outdoor Synthetic
Carpet Covering
Only the finest components are used to provide
maximum efficiency and response. In order to more
fully understand the operational characteristics of your
1272X / 1275X loudspeaker monitor system enclosure,
please read through this operational user’s guide.
CAUTION: Almost all speakers produce strong
magnetic fields which may interfere with the
normal operation of nearby electronic devices,
including televisions and computer video monitors.
To reduce or eliminate interference, increase the
distance between this product and other nearby
electronic devices.
3
SPEAKER WIRING AND CONNECTIONS
Parallel or series are the two basic ways which multiple
speakers can be connected to a single power amplifier.
When speakers are connected in parallel, their
combined impedance decreases. For speakers wired
in series the opposite is true, their combined
impedance increases. Thus, when speakers are wired
in series, higher impedance speakers in the series draw
more power from the amplifier than do speakers in the
series with lower impedances. When speakers are
wired in parallel, the opposite is true. Higher
impedance speakers will draw less power from the
amplifier than lower impedance speakers will draw.
Keep in mind, power and audio signal cables are the
most common sources of sound system failure. Well
made and carefully maintained cables are essential to
the reliability of the entire sound system. If long speaker
cables are required, it is important to ensure the cable‘s
gauge is sufficient to transfer all of the available
amplifier power to the speakers rather than absorbing
the power itself. As a rule of thumb, larger wires are
better as they conduct more power to the speakers
(larger wire has smaller gauge numbers).
Below are two charts listing speaker wire gauges and
recommendations for best results.
At Fender ®, we recommend connecting multiple
speakers in parallel for several reasons. First, if one
speaker fails, the others will continue to operate. Second,
because in a series connection one speaker affects the
output of the other speakers, unpredictable frequency
response is a concern. Third, most speaker cabinets
are already wired for parallel connections making parallel
connections the most common wiring method.
SPEAKER WIRE LENGTH
SPEAKER WIRE GAUGE
Below are two charts demonstrating how to calculate
both parallel and series impedance.
PARALLEL IMPEDANCE
1
1
1
1
+
Z 1 Z 2 ... Z n
Cabinet B
Impedance
Zp =
16Ω* 5.3*
4
8Ω
8
5.3
+
-
A
+
-
100'-UP
(30.5 m-UP)
50'-100'
(15.25-30.5 m)
*25'-50'
(7.60-15.25 m)
10'-25'
(3.05-7.60 m)
0'-10'
(0.00-3.05 m)
+
-
12
14
16
14 *16
18
16
18
18
18
18
18
*Example - If the speaker wire length
required is between 25-50 feet (7.6015.25 meters) and the speaker
impedance is 8Ω, the minimum
recommended speaker wire gauge is 16.
*Example- Cabinet A is 8 ohms. Cabinet B is
16 ohms . The total impedance when connected
in parallel is:
1
Zp =
= 5.3 ohms.
1
1
8 + 16
Cross-
Resistance in Ω per foot
AWG Section
2
[mm ] (30.5 cm) @ 77º F (25º C)
SERIES IMPEDANCE
Cabinet B
Impedance
14
SPEAKER IMPEDANCE [z]
Cabinet A
Impedance
8Ω
12
4Ω *8Ω 16Ω
B
8Ω* 16Ω
16Ω*
10
18
20*
24
32
10
12
16
24
4Ω
6
8
12
20
2Ω
4
6
10
18
2Ω 4Ω* 8Ω 16Ω
Cabinet A
Impedance
Z s = Z + Z ... Z
1
2
n
+
+
-
A
+
-
B
-
*Example- Cabinet A is 4 ohms. Cabinet B is
16 ohms. The total impedance when
connected in series is 4 + 16 = 20 ohms.
4
18
0.83
.00651
16
14
1.32
2.10
.00409
.00258
12
10
3.32
.00162
5.27
.00102
8
8.38
.00064
1272X /1275X SPEAKER CONNECTIONS
SETUP SUGGESTIONS
The 1/4" jacks are wired in parallel
allowing any one of the jacks to be used
as an input and the other as an output.
This allows "daisy chaining" of multiple
loudspeakers, eliminating the need for
several long, cumbersome runs of
speaker cable. The connections are as follows:
Polarity
The placement of any speaker can affect
its sound. Thus, there are several
considerations to review when placing
your 1272X /1275X monitor.
CAUTION! When operating with large amplifiers
(greater than 150 watts at 4 ohms) always set the
level control between the 3 o’clock and 5 o’clock
positions. Failure to do so may lead to overheating
and damage the level control.
Phone Jack
Positive (+)
Negative (-)
Tip
Sleeve
Connect the amplifier to the loudspeaker with a
minimum 16 gauge wire when a length of no more than
100 feet is used. When multiple speakers are “daisy
chained” together or where longer cable runs are
encountered, use a larger gauge wire. Although no
harm or hazard will result, using too small a gauge of
wire may cause the sound quality and level to degrade.
1) When using stage monitor systems, the reduction
of feedback is probably the most important criteria.
The best way to reduce feedback is to use a CARDIOID
pattern microphone with it’s rear aimed at the
loudspeaker. Remember: Do not cover the side or
top slots of the microphone with your hands as this
could cause feedback.
CARPET COVERING CARE
2) Select a 30 or 60 degree angle based upon the
working distance that you will need. A 30 degree angle
is preferable for performers who require a greater
working distance from the monitor so that movement
about the stage is on axis with the monitor. A 60
degree angle is preferable for performers who have a
shorter working distance and who do not move around
the stage.
1272X /1275X cabinets are covered in
a tough, black indoor/outdoor synthetic
carpet for long life and lasting good
looks. To clean the carpet covering,
simply vacuum away any smudges or
dirt. For stubborn stains, use a light
soapy solution or carpet shampoo with a brush. Avoid
spilling liquids on the input panel, grille and speakers.
3) When larger movements are expected, 1272X
/1275X monitors may be used as side fill monitors so
that wide horizontal coverage can be provided. If used
in the side fill position, it may be advantageous to
elevate the speaker from the floor to keep it aimed at
the performer’s ear level.
The side fill position at about 10 to 15 feet from the
performer is particularly useful for drummers and
keyboard players. This allows program monitoring
while keeping the monitor clear of your equipment. In
the side fill position, the drummer’s / keyboardist’s
vocal microphone can be positioned to the side
allowing the rear of the microphone to face the front
of the monitor minimizing feedback.
5
SPECIFICATIONS
TYPE
PR 395
PR 396
MODEL
1272X
1275X
PART NUMBER
071-1272-200
071-1275-200
CABINET
3/4" (1.9 cm)
3/4" (1.9 cm)
Particle Board
Particle Board
(2) 1/4" Phone Jacks
(2) 1/4" Phone Jacks
12" (30.5 cm) woofer
2" (5.1 cm) voice coil
Dual Piezoelectric
15" (38 cm) woofer
2" (5.1 cm) voice coil
Dual Piezoelectric
60 Hz to 20kHz
50 Hz to 20kHz
CONNECTIONS
DRIVERS
Low:
High:
FREQUENCY
RESPONSE
On Axis,
Half Space
+/- 6 dB
ON AXIS
SENSITIVITY
SPL @
1W/1m:
95 dB
95 dB
COVERAGE
PATTERN
Vertical
Horizontal
70º @ 5 kHz
35º @ 5 kHz
70º @ 5 kHz
35º @ 5 kHz
POWER RATING
200W program
100W EIA RS 426A
200W program
100W EIA RS 426A
NOMINAL IMPEDANCE
16Ω
16Ω
DIMENSIONS
17.3"
22.2"
13.8"
WEIGHT
Height
Width
Depth
(43.9 cm)
(56.4 cm)
(35.1 cm)
37 lbs. (16.8 kg)
A PRODUCT OF:
FENDER MUSICAL INSTRUMENTS CORP.
CORONA, CA 91720 USA
6
19.2"
25.2"
15.8
(48.8 cm)
(64.0 cm)
(40.1 cm)
47 lbs. (21.4 kg)