USER MANUAL
MANUAL DE INSTRUCCIONES
NOTICE D’EMPLOI
BEDIENUNGSANLEITUNG
3
INSTRUCTION MANUAL
1. IMPORTANT NOTE 04
1.1. Precautions 04
2. INTRODUCTION 04
2.1. Main features 04
3. INSTALLATION 05
3.1. Placement, mounting, cooling 05
3.2. Mains connection 05
3.3. Input signal connections 05
3.4. Cut filter or crossover 05
3.5. Limiter circuit 06
3.6. Output connections 06
4. OPERATION AND USAGE 06
4.1. Start up 06
4.2. Input attenuators 06
4.3. Indicators 07
5. CLEANING 07
6. DIAGRAMS 23
6.1. Connection diagram 23
6.2. Technical characteristics 24
6.3. Block diagram 25
6.4. Function list 26
6.5. Function diagram 27
All numbers subject to variation due to production tolerances. ECLER S.A. reserves the right to make changes or
improvements in manufacturing or design which may affect specifications.
4
1. IMPORTANT NOTE
Congratulations! You are the owner of a carefully designed and manufactured equipment. We thank you for
trusting on us and choosing our amplifier LPA.
In order to obtain maximum operativity and perfect functioning order, it is most important to carefully read all
considerations taken into account in this manual before connecting this amplifier.
We recommend our authorised Technical Services if any maintenance task should be needed so that
optimum operation shall be achieved.
1.1. Precautions
The amplifier should have an earth connection in good conditions (earth resistance, Rg=30Ω or
less).
The environment must be dry and dustless.
Do not expose the unit to rain or water splashes, and do not place liquid containers or
incandescent objects like candles on top of the unit.
Do not obstruct the ventilation shafts with any kind of material.
In case there is some type of intervention and/or connection-disconnection of the amplifier, it is most
important to previously disconnect the mains power supply.
Do not manipulate the output terminals to the loudspeakers when the amplifier is switched on, there are
voltages up to 200Vpp.
The output cabling should be connected by a qualified technician. Otherwise only use pre-made flexible
cables.
There are no user or serviceable parts inside the amplifier.
2. INTRODUCTION
The LPA range of amplifiers offers the classical and acknowledged professional reliability of Ecler
amplifiers with a new aesthetic style and at an affordable price. The range consists of 3 stereo models of 320, 500
and 760W RMS per channel over 4Ω. All models are 2 rack units high and are based on a robust chassis. Thanks
to their oversize power supply, the amplifiers can work comfortably at loads of 4 Ω.
The LPAs include balanced inputs via XLR3 connectors and a ¼” jack, and non-balanced inputs via RCA
connectors. Their outputs offer complete versatility, thanks to the dual format used: connectors of the safety
terminal type with a normalized distance and Speakon
®
connectors. They also include an electronic limiter system
to prevent clipping due to signal saturation, and a practical cut filter or switchable crossover, which permits a single
amplifier to provide the low and high signals of a two-way mono loudspeaker system (with one LPA amplifier on
each channel for a stereo configuration).
2.1. Main features:
• Efficient system of progressive ventilation with a flow adaptable to the internal temperature of the amplifier.
Air is taken in at the rear and throws it out at the front panel
• The rotary input attenuation controls are easily accessible on the front panel.
• Indicators for power-on and standby indicators (POWER ON, STBY), signal presence (SIGNAL), clipping
(CLIP), operating mode (BRIDGE), crossover activation (XOVER) and activation of protections
(PROTECT).
• Efficient system of protections against short-circuits, overheating and the presence of a continuous signal,
to prevent damage to the amplifier itself and/or to the loudspeakers connected to it.
• Integrated anticlip circuit (clipping or saturation of the signal) which is permanently activated.
• Operating mode selector: STEREO, PARALLEL and BRIDGE.
• Input sensitivity selector.
• Symmetrical inputs via XLR3 connectors, and ¼” jack type. Asymmetrical inputs via RCA connectors.
• Outputs amplified with terminal-type connectors and Speakon
®
connectors.
• Operation at 8 and 4Ω, or 8Ω in bridge mode.
• Warranty: 2 years.
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