ALA20T - Loudspeaker ATLAS - Free user manual and instructions
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| Brand | Atlas |
| Model | ALA20T |
| Product Type | Passive loudspeaker for commercial sound systems |
| Mounting Type | Ceiling mount (flush) |
| Speaker Driver | 6.5 inch single cone driver |
| Power Handling | 20W RMS (continuous) |
| Transformer Taps | 70V/100V: 20W, 10W, 5W, 2.5W |
| Frequency Response | 80 Hz - 20 kHz |
| Sensitivity (1W/1m) | 88 dB |
| Coverage Angle | 120° conical |
| Impedance (bypass mode) | 8 ohms |
| Dimensions (diameter x depth) | 200 mm x 85 mm |
| Weight | 1.2 kg |
| Color | White |
| Material | ABS baffle, steel grille |
| Input Wiring | Via 4-pole terminal board for easy loop-through |
| Cleaning | Wipe with a dry soft cloth; avoid water and solvents |
| Safety | Professional installation required; do not expose to moisture |
| Repairability | Replaceable driver and transformer; refer to qualified service |
| Use | Designed for background music and paging in commercial spaces |
Frequently Asked Questions - ALA20T ATLAS
How do I set the power tap on the ALA20T?
The ALA20T features a multi-tap transformer for 70V/100V line systems. Locate the rotary switch on the baffle and select the desired tap: 20W, 10W, 5W, or 2.5W. Matching the tap to your amplifier's output and system voltage ensures safe operation and avoids distortion.
Can I use the ALA20T as a standard 8 ohm speaker?
Yes. The transformer includes a bypass mode (8Ω) allowing you to use the speaker without a 70V/100V line system. Set the switch to the 8Ω position to connect directly to a low-impedance amplifier.
What is the recommended mounting height for ceiling speakers?
For optimal sound distribution, mount the speaker approximately 2.5 to 3 meters above the floor. Keep at least 1 meter away from walls to reduce reflections.
How do I clean and maintain the ALA20T?
Clean the grille and baffle with a dry, soft cloth or a vacuum cleaner with a brush attachment. Do not use moisture, solvents, or abrasive cleaners. Periodically check the mounting hardware to ensure it remains secure.
What type of wire should I use for installation?
For 70V/100V systems, use twisted-pair speaker wire with a gauge appropriate for the total cable run (e.g., 18 AWG for runs up to 100 m). For 8Ω operation, use 2-core speaker cable with adequate cross-section (e.g., 16 AWG) to minimize resistance.
Can I paint the speaker grille to match my ceiling?
Yes, the grille is painterly. Remove the grille before painting and apply a thin layer of latex or acrylic paint to avoid blocking the sound holes. Ensure the paint is fully dry before reinstalling.
Is the ALA20T suitable for outdoor use?
No. The ALA20T is designed for indoor use only. It is not rated for exposure to rain, humidity, or extreme temperatures. For outdoor installations, choose an IP-rated speaker.
How many ALA20T speakers can I connect to an amplifier?
The number depends on the amplifier's output power and the tap setting used. For example, a 100W amplifier can drive up to 5 speakers set at 20W, or 10 speakers set at 10W. Always calculate the total wattage sum to stay within 80% of the amplifier's rated power.
Does the speaker have a built-in volume control?
The ALA20T does not include a built-in volume control. You can adjust volume by changing the transformer tap or using an external volume attenuator in the speaker line.
What should I do if no sound comes out?
First, verify the amplifier signal and output. Check that the transformer tap is set correctly and the wiring is polarity-correct. Ensure the speaker switch is not in an incorrect position. If still silent, test the speaker with a multimeter at the terminals or replace the driver/transformer as needed.
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USER MANUAL ALA20T ATLAS
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Product information
Brand : ATLAS
Model : ALA20T
Category : Loudspeaker