User's Manual
3-WAY STEREO
X34SW
CROSSOVER PLUS SUBWOOFER
R
Version 2.0 Dec. 2002
English
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Preface
Dear Customer:
Thanks for choosing LTO Active Crossover and thanks for choosing the one of results of LTO AUDIO TEAM job
and researches
.
For our LTO AUDIO TEAM, music and sound are more than a job...are first of all passion and let us say...our obsession!
We have been designing professional audio products for a long time in cooperation with some of the major brands in
the world in the audio field.
The LTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R&D Centres
in Italy, Netherlands, United Kingdom and Taiwan. The core of our digital audio products is a sophisticated DSP (Digital
sound processor) and a large range of state of the art algorithms which have been developed by our Software Team
for the last 7 years.
Because we are convinced you are the most important member of LTO AUDIO TEAM and the one confirming the
quality of our job, we'd like to share with you our work and our dreams, pay attention to your suggestions and your
comments.
Following this idea we create our products and we will create the new ones! From our side, we guarantee you and we
will guarantee you also in future the best quality, the best fruits of our continuous researches and the best prices.
Our LTO Active Crossover is the result of many hours of listening and tests involving common people, area experts,
musicians and technicians.
The results of this effort is an efficient and effective electronic crossover solution, which will give you precise control
and superior sound from your loudspeaker system.
Nothing else to add, but that we would like to thank all the people that made the LTO Active Crossover a reality available
to our customers, and thank our designers and all the LTO staff, there to make possible the realization of products
containing our idea of music and sound and there to support you, our customers, in the best way, conscious that you
are our best richness.
Thank you very much.
LTO AUDIO TEAM
2
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TABLE OF CONTENTS
1. INTRODUCTION ...................................................................................................................................4
2. FEATURE LIST .....................................................................................................................................4
3. CONTROL ELEMENTS.........................................................................................................................4
3.1 The Front Panel
3.2 The Rear Panel
4. INSTALLATION & CONNECTION ........................................................................................................6
4.1 Mains Connection
4.2 Audio Connection
4.3 Rack Mounting
5. APPLICATION........................................................................................................................................7
5.1 X34SW 3-Way Stereo Plus Subwoofer
6. TECHNICAL SPECIFICATIONS.............................................................................................................8
7. WARRANTY ...........................................................................................................................................9
3
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1. INTRODUCTION
First we give our sincere appreciation for your confidence in LTO products by purchasing our X34SW 3-Way Stereo
Crossover Plus Subwoofer. It is the most effective support to us. The X34SW Stereo Crossover is an ideal crossover
and used universally in most small and large PA systems, recording studio monitors, DJ setups, commercial installations
and live concerts. It is not only adaptable in mounting to different sound systems, but also it has many developed features.
For example, phase inversion switches for Mid & High ways and 30Hz Low Cut for Low and Subwoofer ways.
The X34SW Stereo Crossover is a single rack unit, dual channels electronic crossover, which is able to operate as the
3-way stereo crossover plus subwoofer speaker systems.
2. FEATURE LIST
Single rack unit (1U)
Profesional high-precision stereo 3-way crossover
Output gain controls for all bands
Low/Mid and Mid/High XOVER FREQ. Control
Phase inversion for Mid-High output
30Hz Low Cut for Low and Subwoofer ways
Servo-balanced XLR connectors for all inputs and outputs
Subwoofer output gain adjustment
Superior-quality parts and rigid configuration for long life and full credibility
Excellent performance and low noise interference
3. CONTROL ELEMENTS
3.1 The Front Panel
2
CHANNEL
1
SUB WOOFER
ON
70
CHANNEL
2
250
400
1.2K
2.3K
120
170
250
250
400
1.2K
2.3K
X34SW
R
ON
ON
3-WAY STEREO
CROSSOVER
PLUS SUBWOOFER
90
750 620
5K
230
90
750 620
5K
OFF
OFF
OFF
ON
OFF
70
1K
480
7K
OFF
+
10
OFF
+
10
OFF
+
10
OFF
+
10
50
70
1K
480
7K
OFF
+
10
OFF
+
10
OFF
+
10
LM FREQ.
MH FREQ. 30HZ CUT LOW GAIN
PHASE
MID GAIN
PHASE HIGH GAIN
30HZ CUT
LM FREQ.
MH FREQ. 30HZ CUT LOW GAIN
PHASE
MID GAIN
PHASE HIGH GAIN
POWER
5
4
3
6
6
8
9
7
1
1. Power Switch
Turn the power on or off.
2. L/M/H Output Gain Controls
These knobs are used to attenuate or boost the Low/Mid/High frequencies output.
3. 30Hz Low Cut Switch
Engage this button to add a 30Hz Low Cut filter into the input signal path.
4. M/H CROSSOVER FREQ. Control
This knob adjusts the Mid/High crossover frequencies from 480Hz to 7kHz, based on which, the Mid/High
frequencies can be output separately.
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5. L/M CROSSOVER FREQ. Control
This knob adjusts the Low/Mid crossover frequencies from 70Hz to 1kHz, based on which, the Low/Mid frequ-
encies can be output separately.
6. Phase Inversion for Mid-High Output
These buttons will reverse the phase of the Mid and High frequencies output by 180 , so that, the middle and high
frequencies cancellation in some fields can be compensated for.
7. Sub CROSSOVER FREQ. Control
This knob adjusts the crossover frequencies of the Subwoofer way from 50Hz to 250Hz.
8. Subwoofer Output Gain Control
This knob is used to attenuate or boost the subwoofer output gain.
9. Subwoofer Low Cut Switch
Engage this button to add a 30Hz Low Cut filter in the Subwoofer way.
3.2 The Rear Panel
HIGH OUT
2
MID OUT
2
LOW OUT
2
INPUT
2
WOOFER
HIGH OUT
1
MID OUT
1
LOW OUT
1
INPUT
1
10 11
12
13
14
10. Fuse Holder /Voltage Selector
Your unit may have the AC voltage selector (~115V/60Hz or ~230V/50Hz) built into the Fuse Holder. To change,
pull fuse-holder out and rotate 180 , then push in again.
Caution: The fuse protecting the AC supplies circuits of this unit. The fuse can only be changed by a qualified
technician, in the event of a fault or changing the supply voltage. If the fuse continues to blow after replacing, disc-
ontinue use of this unit before repaired.
1 1 0 - 1 2 0 V
2 2 0 - 2 4 0 V
110-120V
220-240V
THIS IS SET FOR
110V AC TO 120V
AC OPERATION
THIS IS SET FOR
220V AC TO 240V
AC OPERATION
The fuse-holder above the AC connector on the rear of the chassis has 3 triangular markers(please refer to the
above pictures), with two of these triangles opposing each other, your unit is set to the operating voltage printed
next to these markers.
5
11. AC Inlet
This connector is used to connect the supplied main cord. Please don't plug power cable into unit and AC power if
voltage has not been properly set.
12. L/M/H Output Connectors
These balanced XLR connectors are used to output the Low/Mid/high frequencies signals.
13. Stereo Input Connectors
These balanced XLR connectors are used to input the program sources.
14. Subwoofer Output Connector
This balanced XLR connector is used to connect your subwoofer amplifier.
4. INSTALLATION & CONNECTION
4.1 Mains Connection
Please ensure that the LTO X34SW Active Crossover is set to the correct supply voltage before plugging the
power cord into the wall outlet, use the same fuse as marked on the fuse holder at the AC power connection socket.
The mains connection of the LTO X34SW Active Crossover is made by using the enclosed mains cord and a
standard IEC receptacle. It meets all of the international safety certification requirements.
4.2 Audio Connection
The LTO X34SW Active Crossover presents with balanced XLR connectors, and it can be interfaced by several ways to
support a variety of applications without any signal loss.
a. Wiring Configuration
Either the 1/4" TRS (Tip-Ring-Sleeve) jack or the XLR servo connector can be wired in balanced and unbalanced
modes. Please wire your systems as the following examples:
For 1/4" Phone jack
+
+
+
-
Tip
Sleeve
Tip
Sleeve
Tip
Ring
Ring
Sleeve
TS Type Unbalanced
TRS Type Balanced
TRS Type Unbalanced
For XLR connector
Pin2 (+)
Pin3 (-)
Pin2 (+)
Pin3 (-)
(Linked to Pin1 manually,
)
Pin1 (
)
Pin1 (
)
XLR Type Unbalanced
XLR Type Balanced
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b. In Line Connection
For these applications, the X34SW Active Crossover provides XLR connectors to easily interface with most
professional audio devices. Follow the configuration examples below for your particular connection.
Balanced
1
2
1
2
3
3
Tip
1
2
3
Ring
TIP RING SLEEVE
Sleeve
Unbalanced
Tip
1
2
3
Ring
Sleeve
TIP RING SLEEVE
Tip
1
2
3
Sleeve
TIP SLEEVE
1
2
3
Centre
Screen
1
2
1
2
3
3
4.3 Rack Mounting
The most secure mounting is on a universal rack shelf available from various rack manufactures or your music
dealer. The X34SW Active Crossover fits into one standard 19" rack unit of space. Please allow at least an add-
itional 4" depth for the connectors on the rear panel. Be sure that there is enough air space around the unit for
sufficient ventilation and please do not place the X34SW Active Crossover on high temperature devices such as
power amplifiers etc. to avoid overheating.
5. APPLICATION
5.1 X34SW 3-Way Stereo Plus Subwoofer
To get such a typical application, configure your system and connect the wires in the following proper steps:
1. Apply the stereo program sources from the Mixer to the Input Connectors of Channel1 and Channel2.
2. Output the Low frequencies signal to the power amplifier.
3. Output the Mid frequencies signal to the power amplifier.
4. Output the High frequencies signal to the power amplifier.
5. Output the sub frequencies signal to the power amplifier
6. Power up the X34SW first, then the power amplifier to run the system. While powered off, please ensure the power
amplifier is turned off first, then the X34SW.
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HIGH
MID
HIGH
MID
LOW
LOW
SUB
NEW TIDE
3
NEW TIDE
3
2
1
2
1
HIGH OUT 2
MID OUT 2
LOW OUT 2
INPUT 2
WOOFER
SUB
HIGHOUT1
MIDOUT1
LOWOUT1
INPUT1
6. TECHNICAL SPECIFICATION
Electrical
Subwoofer Frequency Range
Low - Mid Frequency Range
Mid - High Frequency Range
THD
50Hz ~ 250Hz
70Hz ~ 1KHz
480Hz ~ 7KHz
<0.05%
S/N Ratio
>80dB
Controls
Input Level
Output level
Low Cut
continuously variable
Sub, Low, Mid, High continuously variable
Front panel switches
Front panel switches
Phase
Power supply
Physical
Connector type
Type
3-pole IEC, grounded
Servo controlled, stabilized
95-120V /210-240V , 60-50Hz
8W
Mains supply
Power Rating
Dimensions
Weight
483(W) 194.5(D) 44(H)mm(19" 7.7" 1.7")
3.0 kg(6.62lb)
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7. WARRANTY
1. WARRANTY REGISTRATION CARD
To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within
10 days of the Purchase Date.
All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of
the sales status, so as to purport a more effective and efficient after-sales warranty service.
Please fill out all the information carefully and genuinely, miswriting or absence of this card will void your warranty
service.
2. RETURN NOTICE
2.1 In case of return for any warranty service, please make sure that the product is well packed in its original shipping
carton, and it can protect your unit from any other extra damage.
2.2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine, and give detail
information about your return address and contact telephone number.
2.3 A brief description of the defect will be appreciated.
2.4 Please prepay all the costs involved in the return shipping, handling and insurance.
3. TERMS AND CONDITIONS
3.1 LTO warrants that this product will be free from any defects in materials and/or workmanship for a period
of 1 year from the purchase date if you have completed the Warranty Registration Card in time.
3.2 The warranty service is only available to the original consumer, who purchased this product directly from the
retail dealer, and it can not be transferred.
3.3 During the warranty service, LTO may repair or replace this product at its own option at no charge to you for
parts or for labor in accordance with the right side of this limited warranty.
3.4 This warranty does not apply to the damages to this product that occurred as the following conditions:
Instead of operating in accordance with the user's manual thoroughly, any abuse or misuse of this product.
Normal tear and wear.
The product has been altered or modified in any way.
Damage which may have been caused either directly or indirectly by another product / force / etc.
Abnormal service or repairing by anyone other than the qualified personnel or technician.
And in such cases, all the expenses will be charged to the buyer.
3.5 In no event shall LTO be liable for any incidental or consequential damages. Some states do not allow the exclu-
sion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.
3.6 This warranty gives you the specific rights, and these rights are compatible with the state laws, you may also
have other statutory rights that may vary from state to state.
9
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SEIKAKU TECHNICAL GROUP LIMITED
No. 1, Lane 17, Sec. 2, Han Shi W. Road, Taichung, 401 Taiwan
All rights reserved to ALTO Mobile. Due to continued development in response to
customer feedback, product features, specifications and/or internal/external design may be
changed without prior notice. No photocopying, translation or reproduction of any part of this user
c
manual is allowed without prior written permission.Copyright 2004 Seikaku Technical Group Limited.
NF00861-1.0
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