PORTABLE
SOUND SYSTEMS
From Fender Pro Audio
Owner's Manual for
LTB Portable Sound System
P/N 051923
REV B
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THE FENDER LTB
PORTABLE POWERED
MIXER
INTRODUCTION
The LTB: an 80 watt professional powered mixer
80 Watts into 4Ω
from your friends at Fender® Pro Audio. We are sure
you will find your new LTB sound system to be both
a unique and effective sound reinforcement product,
providing years of trouble-free service. With ease of
setup in mind, the integrated mixer/amplifier design
combined with the full-range LTB-10 speaker
enclosures makes your LTB a versatile, yet simple to
operate sound system. Included in your LTB
package is one dynamic cardiod microphone, one
microphone cable and two speaker cables;
everything you need to get started.
3-Band Equalizer
+15V DC Phantom Power
Individual Channel Effects Level Control
Both 1/4 inch Phone TS and 3-Pin XLR
Female Input Connectors
Enclosed in a boxtop style cabinet, your LTB
mixer/amplifier features individual channel preamps,
+15V DC phantom power, line and mic level channel
inputs, a patch bay and much, much more. With
1/4 inch TS phone jacks and 3-Pin XLR female
input jacks, your LTB sound system can
accommodate a wide variety of input connections
and signal levels.
Patch Points for Line Level Outboard Gear
Full-bodied Spring Reverb
Everything You Need to Get Started:
LTB Mixer / Amplifier
Ideal for live music, churches, auditoriums, hotel
conference or meeting rooms, your LTB sound
system is suitable for a variety of sound
reinforcement applications. The LTB mixer /
amplifier‘s front panel patch bay makes using
outboard effects gear and signal processing
equipment a snap. Moreover, the patch bay
provides easy access for adding or rerouting power
amplifiers. Still, the LTB-10 speaker enclosures
deliver a powerful, full-range sound ideal for music,
vocals or whatever your sound needs require.
One Dynamic Cardiod Microphone
One Microphone Cable
Two Speaker Cables
Two Full-Range Speaker Enclosures
Designed for the both novice, as well as the
seasoned audio professional, your LTB sound
system will provide years of reliable, trouble-free
service, day in and day out. Please read through
this owner’s manual in order to more thoroughly
understand the operation of your LTB portable
sound system.
WARNING:
- TO REDUCE THE RISK OF FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR
MOISTURE.
- NO USER SERVICEABLE PARTS INSIDE, REFER
SERVICING TO QUALIFIED PERSONNEL ONLY.
- THIS UNIT MUST BE EARTH GROUNDED.
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INPUT CHANNEL CONTROL FUNCTIONS
A
C
B
D
E
A. EQ - Adjusts the tone / frequency boost or cut of D. HIGH Z - Plug your high impedance
its respective channel. When the tone control is set microphones, keyboards, drum machines, outboard
at the 12 o’clock (notched) position, the channel is effects, etc. in here. This 1/4 inch, TS unbalanced
“flat” with no frequencies cut or boosted. As the dial input jack is suited for use with items having line
is rotated clockwise, the treble response increases. level outputs.
Likewise, as the dial is rotated counterclockwise the
treble response decreases.
E. LOW Z - Plug your microphone in here. This
three pin XLR balanced female input connector is
B. EFX - This knob controls the amount of signal its intended for input signals from low impedance
respective channel sends to the EFX output jack for microphones. Pins 2 and 3 automatically provide
external signal processing devices and to the internal Phantom Power (+15V DC) for some condenser
reverb pan. When the knob is set at 0, no signal is style microphones.
sent to the EFX output jack for external signal
processing or to the internal reverb pan.
C. LEVEL - Adjusts the volume of the individual
channel. Rotating the knob clockwise increases the
respective channel’s contribution to the “Main Out”
mix. After slowly raising the MAIN volume control,
slowly bring up this input level control listening for
the onset of feedback or howling or until the desired
level is reached. The LTB’s overall volume can be
increased by rotating the MAIN control clockwise.
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MASTER CONTROL PANEL FUNCTIONS
F
B
C
A
G
F. POWER LED - This LED
illuminates when the LTB is on.
D
E
G. POWER SWITCH - Turns
the AC power ON and OFF.
H. MAIN - This 1/4 inch, TS,
unbalanced, line level output is
designed to feed the LTB’s main
bus signal to an external power
amplifier or main house mixer.
H
I
J
K
A. LOW - Adjusts the amount of low frequency
boost or cut in the LTB. When all the tone controls
are set at their 12 o’clock (notched) position, the
LTB is “flat” with no frequencies cut or boosted.
I. EFX - This 1/4 inch, TS, unbalanced, line level
output jack is designed to feed the LTB’s effects bus
signal to an external signal processing device, such
as a digital delay or a chorus unit.
B. MID - Adjusts the amount of middle frequency
boost or cut in the overall mix.
J. AUX IN - This 1/4 inch, unbalanced, TS, line level
input jack is designed to accept signal from an
external processing device, such as a digital delay or
a chorus unit. Any signal entering this jack is mixed
into the Main bus signal.
C. HIGH - Adjusts the amount of high frequency
boost or cut in the overall mix.
D. MAIN - The main volume control of the LTB.
Rotating the knob clockwise increases the LTB’s
overall volume level.
K. FTSW - This 1/4 inch, TS, unbalanced, output
jack is designed for use with an optional footswitch
(P/N 048458). When a footswitch is inserted into
this jack, the LTB’s internal reverb can be turned on
or off remotely.
E. REV - Adjusts the reverb signal level sent to the
main mix. Rotating the knob clockwise increases
the amount of reverb signal.
REAR PANEL FUNCTIONS
L. POWER SUPPLY CORD M. PARALLEL SPKR
M
L
- This is a grounding type JACKS
-
These
supply cord to reduce the speaker level output
possibility of shock hazard. jacks feed your main
Completely unwind the cord speaker enclosures.
from its cord wrap to prevent Remember, the total
blocking air flow. Be sure to minimum impedance
8 0 W
4 Ω M IN. LOAD TOTAL
connect the cord to a load is 4 ohms. Connecting a load of less than 4
grounded receptacle. DO ohms may result in unsatisfactory performance such
NOT ALTER THE AC PLUG. as overheating to the point of thermal shutdown.
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BASIC SETUP OF YOUR LTB
Before using the LTB, please read and
follow the steps listed below:
1. IMPORTANT Heed all safety warnings when
operating the LTB.
2. Please be sure to check for these items. The
LTB sound system comes complete with 2 LTB-10
Speaker cabinets, 2 speaker cables, 1 microphone
cable and 1 dynamic cardioid microphone.
3. Make sure the power switch is in the OFF
position, the EQ, LOW, MID and HIGH tone controls
are in their 12 o’clock notched positions and all
channel LEVELS, the MAIN and the REV are in their
MIN positions.
Stereo Cassette
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This full page illustration can be found on page 8.
4. Next, plug the supply cord into a power source
with the correct voltage.
7. Turn all instruments, outboard gear and other
equipment ON before powering up the LTB.
5. Connect the speaker cables
from the LTB’s SPEAKER
OUTPUT jacks located on the rear
of the LTB mixer to the input jacks
on the speaker cabinets.
8. Slowly raise the MAIN volume control to its 12
o’clock position. Next, slowly bring up the
appropriate channel input level control (ie: if the
microphone is plugged into the channel 1 inputs, the
appropriate channel control is labeled 1), listening for
the onset of feedback or howling or until the desired
level is reached. The LTB’s overall volume can be
increased by rotating the MAIN
8 0 W
4 Ω M IN. LOAD TOTAL
6. Connect the cord(s) from any microphones,
instruments, outboard gear or other signal source(s)
to the appropriate input jack(s) on your LTB.
control clockwise.
9. If using external signal processing
devices, slowly raise the appropriate channel EFX
control until the desired level is reached (ie: if the
microphone is plugged into the channel 1 inputs, the
appropriate channel control is labeled 1).
10. When shutting down the LTB, turn OFF the LTB
FIRST then any additional outboard gear,
instruments or other equipment.
For more detail on setting up your LTB, please refer
to the diagrams on pages 9 and 10.
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GROUNDING AND HUMS
TROUBLESHOOTING
Ground loops are one of the most
common causes of hum and buzz in
sound reinforcement systems and other
If the LTB is set up but does not
function, please check the following
items:
audio products. A ground loop usually
occurs if the separate pieces of
equipment are plugged into different AC
circuits. Also, if the audio wiring is placed too close
to the power cords, hums or buzzes can bleed into
the system. Still, improperly maintained power and
audio cables are yet another cause of bothersome
noise. In order to help minimize stray hums and
buzzes, here are some helpful hints.
• Is the LTB 's power cord properly plugged into an
electrical outlet?
• Is there power at the outlet?
• Are the volume control knobs on the LTB turned
above the MIN position?
1. Keep all electronics connected to the sound
system on the same electrical circuit.
• Are the volume control knobs on your instruments
turned above their minimum position?
• Is the mic/instrument properly plugged into the
LTB ?
2. Keep audio signal cables away from the AC
power cords.
• Is the mic/instrument turned on?
• Are your audio cables frayed, cut or damaged?
• If using an outboard gear, are the cords
properly connected?
• Are the speaker cables properly connected?
• Is there power to the outboard gear?
• Are the levels on your outboard gear above their
minimum positions?
3. Use balanced cables when applicable.
4. Always plug the LTB into a grounded AC electrical
outlet.
5. Be sure to use properly maintained cords and
cables with the LTB.
• (If applicable) does your instrument have power?
VINYL COVERING CARE
If after checking all of the above the LTB is still not
performing correctly, consult your nearest authorized
Fender Service Center.
The LTB mixer and speaker cabinets
are covered in vinyl for long life and
lasting good looks. To clean the
cabinets, use a sponge dampened with
a light soapy solution. Avoid spilling any
liquids on the operating surface, grilles, volume and
tone controls, switches and line cord inputs.
ALWAYS unplug the LTB before cleaning it or
approaching it with fluids. Before plugging in the
LTB wait until the unit has completely dried.
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SIMPLE LTB SETUP
Stereo Cassette
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1. Connect the speaker cords from the PARALLEL 3. The LEVEL control in each channel strip adjusts
SPKR JACKS to the LTB-10 speakers.
the amount of signal sent to the main bus where all
channel signals are summed. The MAIN knob in
2. Connect a microphone to a LOW Z input jack and the master section adjusts the volume level to the
any keyboard or other instrument to a HIGH Z input main speakers.
jack.
4. Be sure to turn the tape deck, keyboard or other
instruments and gear on before powering up the LTB.
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RUNNING AN EFFECTS PROCESSOR THRU YOUR LTB
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1. Connect speakers, microphones and other 3. The EFX knob on each channel adjusts the
equipment to the LTB as before.
amount of signal sent to the EFX jack where the
signal is then sent to the processor.
2. Next, connect a cord from the EFX jack to the input
on the effects processing unit. Return the signal to 4. Be sure to turn on the tape deck, keyboard or
the LTB by connecting a cord from the output of the other instruments and outboard gear before
effects unit to the AUX IN jack on the LTB.
powering up the LTB.
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SPECIFICATIONS FOR THE LTB POWERED MIXER
DESIGNATION TYPE
PART NUMBER
PR 345
071-1700-000 (120 V)
071-1730-000 (240 V) Aust
071-1740-000 (230 V) UK
071-1760-000 (230 V) Euro
POWER SPECIFICATIONS
120V version: 120V AC, 60 Hz, 270W
230V version: 230V AC, 50 Hz, 270W
240V version: 240V AC, 50 Hz, 270W
PRE-AMPLIFIER SECTION
MIC INPUT IMPEDANCE
LINE INPUT IMPEDANCE
MIC INPUT SENSITIVITY
LINE INPUT SENSITIVITY
2.7 kΩ
100 kΩ
2 mV
6 mV
CHANNEL TONE CONTROLS Low +/- 15 dB @ 30 Hz
Mid +/- 15 dB @ 1 kHz
High +/- 15 dB @ 15 kHz
OVERALL AMPLIFIER
-3 dB @ 10 Hz to -3 dB @ 50 kHz
FREQUENCY RESPONSE
(Aux In @ 10 mV)
PHANTOM POWER
POWER AMPLIFIER SECTION
POWER OUTPUT
+15 V DC
80W @ <0.03% T.H.D. + noise @ 1 kHz into 4 Ω
RATED LOAD IMPEDANCE
INPUT SENSITIVITY
4 Ω
34 mV
DIMENSIONS
Height: 5.75 in
Width: 17.5 in
Depth: 10 in
14.6 cm
43 cm
25.5 cm
WEIGHT
20 lbs
9 kg
PRODUCT SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
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SPECIFICATIONS FOR THE LTB-10 SPEAKER ENCLOSURE
DESIGNATION TYPE
PART NUMBER
PR 355
071-1710-000
75 Hz - 20 kHz
60W
FREQUENCY RESPONSE
POWER HANDLING
IMPEDANCE
8Ω
LF DRIVER
10” with 1.5” voice coil
Piezoelectric Horn
94 dB, 1W - 1M
111dB continuous, 117 dB peak
4 kHz
HF DRIVER
SENSITIVITY
MAXIMUM OUTPUT SPL @ 1 M
CROSSOVER FREQUENCY
DIMENSIONS
Height: 16.75 in
Width: 12.75 in
Depth: 11.75 in
42.5 cm
32.4 cm
29.8 cm
WEIGHT
16 lbs
7.3 kg
PRODUCT SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
A PRODUCT OF:
FENDER MUSICAL INSTRUMENTS CORP.
CORONA, CA 91720 USA
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