LSS SP425 User manual

PROFESSIONAL AUDIO SYSTEM
SP425
OPERATING MANUAL
Ver. SP425-EN-1.1
LSS Advanced Speaker Systems
Via On. Longo 53-89024 Polistena (RC) ITALY Tel [phone] –Fax [phone] Email: [e-mail] - Internet: www.lss.it

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NOTICE:
LSS products are manufactured for use according to proper procedures by a
qualified operator and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in
this manual. Always heed the information provided with them. Failure to
heed precautions can result in injury to people or damage to property.
© LSS, 2016
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in
any form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior
written permission of LSS.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because
LSS is constantly
striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, LSS assumes
no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of
the information contained in this publication.

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SUMMARY
INTRODUCTION ............................................................................................................................................ 4
SAFETY AND WARNING.............................................................................................................................. 5
APPLICATION................................................................................................................................................. 6
PHYSICAL DESCRIPTION........................................................................................................................... 6
TECHNICAL SPECIFICATIONS.................................................................................................................. 7
INSTALLATION AND WIRING..................................................................................................................... 8
WEEE DIRECTIVE....................................................................................................................................... 11
TROUBLESHOOTING................................................................................................................................. 12
DIMENSIONS................................................................................................................................................ 13
NOTES........................................................................................................................................................... 14

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INTRODUCTION
Congratulation on the purchase of your new LSS loudspeaker.
Quality innovation and versatility, this is a summary of the new system
developed by LSS for professional sound users.
LSS produces professional audio products –the result of exceptional
engineering and meticulous craftsmanship.
This manual is intended for use with LSS loudspeaker. This includes: safety
precautions; installation, set-up and operating instruction.
Please read this manual plus any accompanying manual and follow all
relevant precautions and instructions. This should allow you to obtain the
maximum performance from your new loudspeaker.
Where there are conflicts or overlaps, the information in any accompanying
manual supersedes the information in this manual.

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SAFETY AND WARNING
IMPORTANT! SAFETY WARNING!
In the interest of their own and others' safety and to prevent voiding the
warranty, we recommend a careful reading of this section before using the
product.
- This product was designed and manufactured to be used as a speaker system in
the context of a typical sound reinforcement system.
The use for any purpose other than these is not provided by the manufacturer and is
therefore under the direct responsibility of the user / installer.
- This device complies with class I (must be connected to the outlet with a protective
earthing connection).
TO AVOID THE RISK OF FIRE AND / OR ELECTRIC SHOCK*:
- Do not expose this system to rain or moisture. Do not expose the apparatus to
dripping or splashing water. Do not place objects filled with liquids, such as drinks, on
the apparatus.
- Before connecting the system, be sure the mains voltage corresponds to that stated
on the product.
- Connect this appliance to a power outlet with earth contact, according to national
security force, via a power cable of adequate section ends with a plug or connector
that meets the applicable safety regulations.
- The unit is connected to the network even when the power switch is in position '0'
(OFF). Before any maintenance, disconnect the power cable from the outlet.
*Risk of electric shock only for self-powered system.
IMPORTANT! SAFETY PRECAUTIONS!
Read This First.
Read and heed all warnings and safety instructions in this Manual before using the
product.
Failure to follow all precautions can result in equipment damage and / or personal
injury.
1. Read these instructions.
2. Keep these instructions
3. Heed all warnings and follow all instructions.
4. Use only attachments/accessories specified by the manufacturer.
5. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury from tip-over.
6. Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
7. LSS loudspeakers can produce sound levels capable of causing permanent
hearing damage from prolonged exposure. The higher the sound level, the less
exposure needed to cause such damage
CAUTION: This product is energized as long as it is connected to the AC.
CAUTION: Allow at least six inches of free space all around the amplifier for sufficient
ventilation.

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APPLICATION
LSS's SP425 is a 2-way loudspeaker system that provides high output, low
distortion sound reinforcement for the entire range of pro audio applications.
The 250 mm (10") low frequency cone and 44 mm (1.75") voice coil high
frequency compression driver provides higher output and lower distortion
plus enhanced power handling capabilities for better performance in both
portable and permanently installed applications. LSS's advanced crossover
includes professional protection of HF. The SP425 offers a switchable
powering mode: passive operation using the internal crossover filter network
or bi-amplified operation.
The SP425 was designed for distributed systems, the 13° per side trapezoid
angles match the 90° horizontal coverage pattern allowing the creation of
tight packed clusters. The pole mount cup and balance-optimized handles
allow for quick and easy load-in for portable use. Its high output capabilities
let it act as a main system for smaller concert or portable A/V events or even
provide front or side fill for concert touring applications. The comprehensive
system mounting points allows safe suspension in permanent installations.
PHYSICAL DESCRIPTION
SIDE
[A]
FRONT
TOP
BOTTOM
REAR
[B]
[C]
[D]
[E] [F]
[G] [H]
[J] [N]
[K]
[I]
[L]
[M]
[A] Side Fixing Points [H] Connection Panel
[B] HF Driver [I] Top Fixing Points
[C] Enclosure Cabinet [J] Bottom Fixing Points
[D] Woofer [K] Handle
[E] Steel Protection Grid [L] Handle
[F] Reflex [M] Handle
[G] Rear Fixing Points [N] Pole Mount Cup
Materials and construction meet the highest professional standards to ensure maximum reliability.

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TECHNICAL SPECIFICATIONS
PHYSICAL
Dimensions mm (±1 mm)
[Inches]
Height 510 [20.08’’]
Front Width 320 [12.60’’]
Rear Width 160 [6.30’’]
Depth 365 [14.37’’]
Trapezoidal Angles 13°
Weight Kilograms
Net Weight 18
Shipping Weight 21
SYSTEM PERFORMANCE
Frequency Response
±5 dB 65 Hz ~ 18 KHz
-10 dB 45 Hz
Sensitivity (1 Watt @ 1 m)
Full Range Passive 96 dB
LF 96 dB
HF 103 dB
Max SPL Calculated
(Power AES)
[PEAK]
122 dB
[126 dB]
Nominal Input Impedance (Ω)
Full Range Passive 8 Ω
LF 8 Ω
HF 16 Ω
Power Handling (Watt cont.
AES)
Full Range Passive 400 W
LF 350 W
HF 50 W
Peak Power (Watt)
Full Range 1000 W
LF 875 W
HF 125 W
Nominal Dispersion (@ -6
dB)
Horizontal 90°
Vertical 40°
MECHANYCAL
Enclosure material
Birch Plywood of 15 mm [0.59
inches]
Finish
Texture poliuretanic black paint
Suspension
12 Point Mounting Suspension
Grille
Powder coated perforated steel
with anti-dust foam
Connectors
Neutrik Speakon NL4
Optional Accessories
Fly Clip with Ring, Speaker
Soft Bag

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INSTALLATION AND WIRING
SP425 speaker can be mounted to the wall, on a pole or suspended through
the suspension points.
For installation on a pole, use the pole mount plate in the bottom of the case,
speaker can be mounted on a tripod or on another speaker (sub).
For suspended installation, there are six brackets inside the case: three in
the top, three in the bottom. Each bracket is secured to two adjacent internal
side of speaker using two M10 screwbolts.
If needed, replace the screwbolts with eyebolts.
More detaliled:
One bracket is connected between top and left side of case.
One bracket is connected between top and right side of case.
One bracket is connected between top and rear side of case.
One bracket is connected between bottom and left side of case.
One bracket is connected between bottom and right side of case.
One bracket is connected between bottom and rear side of case.
When installation is in suspended mode, use the upper or lower brackets.
Unscrew one of the two screws hold a single bracket, the second screw
must be screwed only after the first one has been tightened to avoid the
bracket moves.
It is possible to install a maximum of three speakers in cascade using
eyebolts.
Use plugs suitable to support the weight of the entire apparatus.

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Choose a safe mounting location, so as to prevent the cables can be
stepped on or create tripping hazards.
Before making connections between mixer and speakers, make sure the
mixer volume is turned down.
In the connection panel there are two Speakon NL4 connectors referred as
‘IN’ and ‘OUT’.
IN is the input connector and must be connected to the amplifier, ‘OUT’ is a
LINK OUT and can be connected to other systems.
In the SP425 both the LF and HF drivers are connected to pins 1+/1–of the
NL4 connector.
Channel 2 has been linked from In to the out.
Recommended configuration in basic stereo system is represented below:
Bracket
with Screws
Pole Mount
Plate
Mixer
Amplifier
Output A
Output B
Input A
Input B
NL4 Pin Configuration
Pins 1+ and 1- Used
Pins 2+ and 2- Not Used

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Recommended configuration using multiple speakers is represented below:
You can now use the system
NL4 Pin Configuration
Pins 1+ and 1- Used
Pins 2+ and 2- Not Used
Amplifier
Output A
Output B
Input A
Input B
Mixer
Amplifier Load (per Output Channel)
# of Speakers Nominal Minimum
1 8 Ohms 7 Ohms
2 4 Ohms 3.5 Ohms
3 2.7 Ohms 2.3 Ohms
4 2 Ohms 1.8 Ohms
Caution: Do not exceed the
maximum load rating of
the amplifier.