The AtlasIED AT100 100-Watt Volume Attenuator provides reliable, wall-mounted speaker volume control for commercial 25V and 70.7V distributed audio systems. Designed for background music and paging installations, the AT100 allows users to adjust the volume of a connected speaker zone without changing the central amplifier's output level.
Featuring a 100-watt autoformer design, the AT100 is suitable for commercial installations with multiple transformer-equipped speakers. Its rotary control provides ten stepped attenuation positions plus a positive off setting, allowing convenient local adjustment in restaurants, offices, retail stores, schools, and other commercial facilities.
The AT100 delivers 3 dB attenuation steps with 27 dB total attenuation and approximately 0.6 dB insertion loss. Silver-plated make-before-break contacts help provide smooth, quiet switching between volume settings.
A removable terminal block simplifies speaker wiring, while the included single-gang stainless steel wall plate and black rotary knob provide a durable, professional finish.
AtlasIED AT100 Key Features
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100-Watt Power Rating: Designed for commercial speaker circuits with a combined connected load up to 100 watts.
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25V/70.7V Compatibility: Suitable for constant-voltage distributed speaker systems.
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Ten Attenuation Steps: Provides approximately 3 dB adjustment per step.
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27 dB Total Attenuation: Allows substantial volume reduction before the off position.
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Positive Off Setting: Completely turns off the connected speaker circuit.
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Make-Before-Break Switching: Helps minimize interruptions when changing volume levels.
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Silver-Plated Contacts: Designed for reliable, low-noise operation.
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Low Insertion Loss: Approximately 0.6 dB.
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Removable Terminal Block: Simplifies installation and speaker wire connections.
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Stainless Steel Wall Plate: Includes a single-gang plate with volume scale.
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Black Rotary Knob: Skirted design provides convenient adjustment.
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Five-Year Manufacturer Warranty: Backed by AtlasIED.
Local Volume Control for Commercial Speaker Systems
The AtlasIED AT100 is designed for distributed audio installations where different rooms or areas need independent speaker volume adjustment.
For example, a restaurant using a central 70V amplifier can install an AT100 to control background music in a dining area without changing the volume in other independently controlled areas.
The attenuator is installed in the speaker line between the amplifier and the connected speakers, providing convenient local control without requiring additional electronic processing equipment.
Smooth, Stepped Volume Adjustment
The AT100 uses an autoformer-based design with ten make-before-break attenuation steps and a positive off position.
Each step provides approximately 3 dB of attenuation, with a total attenuation range of 27 dB before the off setting.
Silver-plated contacts help reduce switching noise, while the autoformer design maintains low insertion loss during normal operation.
The rotary knob allows employees and building occupants to make repeatable volume adjustments without accessing the main audio equipment rack.
Easy Single-Gang Installation
The AtlasIED AT100 includes a stainless steel wall plate with a clearly marked volume scale and black rotary knob.
Its compact design allows installation in a suitable single-gang electrical outlet box.
A removable terminal block makes it easier for installers to connect the amplifier and speaker wiring.
The AT100 has a mounting depth of approximately 2.5 inches, so installers should confirm adequate clearance inside the selected electrical box.
AtlasIED AT100 Technical Specifications
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Specification
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Details
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Manufacturer
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AtlasIED
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Model
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AT100
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Product Type
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Mono autoformer speaker attenuator
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Power Rating
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100 watts
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Compatible Speaker Systems
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25V / 70.7V
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Attenuation Steps
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10 plus off
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Attenuation Per Step
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3 dB
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Total Attenuation
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27 dB
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Insertion Loss
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0.6 dB
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Switching Contacts
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Silver-plated, make-before-break
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Wiring Connection
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Removable terminal block
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Wall Plate
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Single-gang stainless steel
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Control
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Rotary black knob
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Height
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4.5 in. (11.43 cm)
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Width
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2.75 in. (6.99 cm)
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Depth
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2.5 in. (6.35 cm)
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Shipping Weight
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1.6 lb (0.73 kg)
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Safety Listings
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UL 813 / UL 2043
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Manufacturer Warranty
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60 months
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Recommended Applications
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Restaurants and Bars: Local background music volume adjustment.
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Retail Stores: Speaker volume control in sales areas.
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Offices: Adjust music and paging levels in individual rooms.
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Schools: Control distributed audio in classrooms and common areas.
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Houses of Worship: Manage speaker levels in designated listening areas.
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Commercial Buildings: Convenient volume adjustment for compatible 25V/70V systems.
Choosing the Correct 100W Volume Attenuator
When selecting a volume control for a constant-voltage speaker system, calculate the combined transformer tap wattage of the speakers connected downstream of the attenuator.
The total connected speaker load should not exceed the AT100's 100-watt rating.
For example, eight speakers tapped at 10 watts each represent a total connected load of 80 watts.
Important: The AT100 is designed for 25V and 70.7V speaker systems. It is not intended for conventional 4-ohm or 8-ohm speaker circuits.
Why Buy the AtlasIED AT100 from Audio Supply?
Audio Supply offers AtlasIED commercial audio equipment and installation accessories for distributed speaker systems. We can help you select the appropriate attenuator, amplifier, and speakers for your installation.
Need Help Selecting a Compatible Volume Control?
The AtlasIED AT100 is designed for installations requiring up to 100 watts of local speaker volume control.
If your installation requires a different power rating, wall plate style, or paging priority function, contact Audio Supply for assistance selecting the appropriate AtlasIED attenuator.
