OMNITRONIC XDA Series PA Amplifier
Introduction
Thank you for choosing an OMNITRONIC amplifier. Following these instructions will ensure long-term enjoyment. Please keep this manual for future reference.
CAUTION! Keep this device away from rain and moisture! ⚠️
For your own safety, please read this user manual carefully before initial start-up.
This user manual is valid for article numbers 10451635 and 10451636. The latest update is available at: www.omnitronic.de.
Important User Information
- Be qualified for installation, operation, and maintenance.
- Follow all instructions in this manual.
- Consider this manual part of the product.
- Keep this manual for the product's entire service life.
- Pass this manual on to any subsequent owner or user.
- Download the latest version from the internet.
Safety Instructions
CAUTION! Be careful with operations. Dangerous voltage can cause severe electric shock when touching wires. ⚡
HEALTH HAZARD! Operating an amplifying system can produce excessive sound pressure levels leading to permanent hearing loss. ?
This device was in perfect condition when shipped. To maintain this and ensure safe operation, follow all safety instructions and warnings in this manual. Damages from disregarding this manual are not covered by warranty. The dealer is not liable for resulting defects or problems.
Operating Determinations
Product Purpose
The OMNITRONIC XDA Series PA amplifiers are designed for stage and disco applications. They can be used in stereo or bridge (Model XDA-1002) operation. The amplifiers and connected speakers are protected by extensive circuits.
Power Supply
Connect only to a power source matching the device's voltage and frequency. Cable connections: Brown (Live/L), Blue (Neutral/N), Yellow/Green (Earth). The earth connection is mandatory. For direct connection to the local power supply, install a disconnection switch with a minimum 3mm pole opening in the permanent electrical installation. Ensure the installation complies with IEC standards and is equipped with a Residual Current Device (RCD) with a 30 mA fault current.
Installation
Avoid shocks and excessive force during installation or operation. Choose an installation spot away from extreme heat, moisture, and dust. Ensure no cables are lying around to prevent hazards.
Ambient Conditions
Designed for indoor use only. Do not operate or store where splash water, rain, moisture, or fog may occur. Moisture or high humidity can reduce insulation and cause electric shock. When using smoke machines, keep the device at least 0.5 meters away from the smoke jet. Ambient temperature: -5°C to +45°C. Keep away from direct sunlight and heaters. Relative humidity must not exceed 50% at 45°C. Operate between -20 and 2000m altitude. Ambient contamination level must not exceed 1 (dry, non-conductive). Disconnect during thunderstorms to prevent overvoltage damage.
Cleaning
Use a soft, damp, lint-free cloth. Do not use solvents or aggressive detergents.
Operation
Operate only after familiarizing yourself with its functions. Do not allow unqualified persons to operate the device. Most damages result from unprofessional operation.
Transport
Use original packaging for transport to avoid damage.
Serial Barcode
Never remove the serial barcode, as this voids the guarantee.
Modifications and Guarantee
Damages from manual modifications or unauthorized operation are not covered by warranty. Deviating from this manual may damage the product and void the guarantee. Other operations may lead to hazards like short-circuit, burns, or electric shock.
Avoiding Hearing Loss
Amplifying systems can produce sound levels causing permanent hearing loss. Refer to "Legal Instructions" for details.
Public and Industrial Use
Operation in public or industrial areas requires adherence to specific safety instructions. Operators must inform themselves and comply with current safety regulations.
WEEE Directive
Dispose of the unit at a local recycling plant at the end of its life. Do not dispose of as municipal waste. Contact your retailer or local authorities for information.
Legal Instructions
Operating amplification systems can cause permanent hearing loss. Legal instructions vary by country; users must inform themselves and comply. Monitor sound pressure levels in discotheques/concerts and never exceed authorities' specified limits. Document noise level monitoring.
In Germany, specific laws apply (Strafgesetzbuch § 223 ff, TA Lärm, DIN 15905-5, etc.). Hearing damage can be treated as physical injury. Organizers are responsible for noise levels and may face cancellation or civil liability for damages. OMNITRONIC is not liable for damages from incorrect installations or excessive noise levels.
Information on Hearing Loss
Young people increasingly suffer hearing loss due to loud music. Operators must be aware of sound pressure levels exposed to themselves and the audience. Levels can reach 75-105 dB(A) in discos and 95-115 dB(A) at rock concerts, with peaks exceeding 130 dB(A). Doubling power increases noise by 3 dB; hearing perceives a 10 dB increase as double loudness. Hearing damage occurs below the pain threshold. Habituation to noise is not adaptation but a sign of hearing damage, making one insensitive to certain frequencies. This loss is irreversible and can only be partially compensated by hearing aids. To ensure hearing recovery, noise levels should not exceed 70 dB(A) for 10 hours. Higher levels during rest periods can hinder recovery and promote permanent damage (Tinnitus).
Overview of Noise Levels
| Decibels (dB) | Sound Source |
|---|---|
| 10 dB | Heartbeat |
| 20-30 dB | Whisper |
| 40 dB | Average home (with closed windows) |
| 50 dB | Light traffic |
| 60 dB | Normal conversation |
| 70 dB | Vacuum cleaner |
| 80 dB | Heavy traffic or telephone ringing |
| 90 dB | Pneumatic drill |
| 100 dB | Power mower |
| 110 dB | Rock/Pop concert (at a distance from stage) |
| 125 dB | Jet engine at 100m |
| 130 dB | Pain threshold |
| 140 dB | Jet engine at 25m |
Operating Elements & Connections
Front Panel
Status LEDs
- LIMIT: Overload indication
- SIG: Signal indication
- ON: Power indication
- PROT: Protective circuit active
Level Controls
Controls for Channel A and Channel B (volume adjustment).
POWER Switch
Switches the amplifier on and off.
Rear Panel
Power Input
Connection for the supplied power cord.
Ground Lift Switch
Separates signal ground and housing ground to avoid humming.
Speaker Connectors
Speaker jacks for Channel A and Channel B.
Input Jacks
XLR jacks for Channel A and Channel B for line-level signals.
Feed-through Outputs
XLR jacks for connecting a further amplifier.
Operating Mode Selector Switch (Model XDA-1002)
Switches between stereo and bridge operation.
Setup
Rack Installation
The amplifier is designed for 19" racks (483 mm). Use a double-door rack allowing front and rear access. Ensure the rack has a cooling fan. Allow sufficient space for ventilation to prevent overheating. Secure with four M6 screws. If mounting multiple units, leave 1U space between them.
Making the Connections
All connections must be made or changed with the amplifier switched OFF.
Inputs
Connect line signal sources (e.g., preamplifier, mixer) to the XLR inputs. Select the operating mode before connecting.
Feed-through Output
Use the LINK XLR jacks to connect the output to the input of a second PA amplifier for parallel connection.
Speaker Outputs
In stereo mode, connect two speakers or speaker groups to the Speaker jacks. For bridge operation (XDA-1002), switch to bridge mode for higher output to a single 8Ω speaker or group. Ensure plugs are locked into place. Use cables of at least 2.5 mm². For multi-speaker setups, ensure correct polarity and minimum impedance (4Ω stereo, 8Ω bridge). Consult a professional if unsure.
Power Supply
Connect the amplifier to a mains outlet using the provided power cable after all other connections are made.
Operation
Selecting the Operating Mode (Model XDA-1002)
Use the selector switch: Switch disengaged = Stereo Operation (independent channels). Switch pressed = Bridge Operation (Channel A signal to Channel B, Channel B input ignored, volume controlled by Channel A's knob).
Switching On/Off
To prevent loud switching noise, turn on all other system units before the power amplifier, and turn off the power amplifier first. Before switching on, set all level controls to minimum and ensure the operating mode switch is correctly set.
Turn on the amplifier using the power switch. The PROT indicator will light for ~10 seconds. If it stays on, check the mains connection. After the delay, speakers are activated (PROT off). The ON indicator shows the amplifier is powered.
Adjusting the Level
Set pre-amplifier volume controls to zero and amplifier level controls to the middle position. Check for humming; if present, verify connection cables (switch off components first). Adjust level controls to the desired volume. The LIMIT indicator lights up if overload occurs; reduce volume accordingly. In bridge mode, Channel B's level control is disabled; adjust volume with Channel A's control.
Ground Lift Switch
If hum occurs without a music signal, a ground loop may be the cause. Pressing the Ground Lift switch interrupts the ground loop, separating signal ground and housing ground to eliminate humming.
Protective Circuits
Integrated circuits protect speakers and the amplifier. If activated, speakers are disconnected, and the PROT indicator lights up.
Problem Chart
| Problem | Cause | Remedy |
|---|---|---|
| No power. |
|
|
| No sound. |
|
|
| Fans do not work, LEDs do not light up. |
|
|
| PROT LED lights up permanently. |
|
|
Cleaning and Maintenance
DANGER TO LIFE! Disconnect from mains before maintenance. Use a soft, lint-free, moistened cloth. Never use alcohol or solvents!
The device contains no serviceable parts. Maintenance and service must be performed by authorized dealers only.
Use genuine spare parts. If the power supply cable is damaged, it must be replaced with a special cable from your dealer. Contact your dealer for further questions.
Technical Specifications
| Specification | XDA-1002 | XDA-2402 |
|---|---|---|
| Power supply | 230 V AC, 50 Hz | 230 V AC, 50 Hz |
| Power consumption | 210 W (1/8 power) | 465 W (1/8 power) |
| Power output sine | 2 x 510 W (Stereo 4 Ω) | 2 x 1200 W (Stereo 4 Ω) |
| 2 x 300 W (Stereo 8 Ω) | 2 x 880 W (Stereo 8 Ω) | |
| 1 x 1000 W (8 Ω bridged) | ||
| Frequency range | 30-20000 Hz | 30-20000 Hz |
| Distortion factor | <0.05 % | <0.05 % |
| Voltage gain | 36 dB at 8 Ω | 36 dB at 8 Ω |
| S/N ratio | >100 dB | >100 dB |
| Input sensitivity | 1.25 V RMS | 1.25 V RMS |
| Input impedance | 20 kΩ (balanced), 10 kΩ (unbalanced) | 20 kΩ (balanced), 10 kΩ (unbalanced) |
| Input connectors | 2 x XLR | 2 x XLR |
| Output connectors | 2 x Speaker, 2 x XLR feed-through output | 2 x Speaker, 2 x XLR feed-through output |
| Circuitry | Class D | Class D |
| Control elements | Power switch, level control per channel, mode switch (XDA-1002), ground lift switch | Power switch, level control per channel, mode switch (XDA-1002), ground lift switch |
| LED indicators | Protect, Limit, Signal, Power | Protect, Limit, Signal, Power |
| Protection circuits | Short-circuit, overheat, DC voltage, power on/off transients, softstart | Short-circuit, overheat, DC voltage, power on/off transients, softstart |
| Construction | Steel chassis | Steel chassis |
| Dimensions (DxWxH) | 240 x 483 x 44 mm (19", 1 U) | 355 x 483 x 44 mm (19", 1 U) |
| Weight | 4 kg | 6.4 kg |
Specifications are subject to change without notice due to product improvements.
StGB - nichtamtliches Inhaltsverzeichnis
DIN - Deutsches Institut für Normung
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