The Lowell 50LVC 50W Speaker Volume Control is a professional mono autoformer attenuator designed for controlling speaker volume in commercial 25V and 70V distributed audio systems. Featuring a rotary volume control, 50-watt power rating, and standard one-gang stainless steel wall plate, the 50LVC provides convenient local volume adjustment for installed speaker systems.
Ideal for restaurants, retail stores, offices, schools, houses of worship, and other commercial facilities, the Lowell 50LVC allows users to adjust the volume of a connected speaker or group of speakers without changing the main amplifier's output level.
The attenuator provides stepped volume adjustment with 3 dB increments and two additional 6 dB attenuation steps before the off position, for a total of 33 dB of attenuation. Phoenix-style removable screw terminal connectors simplify installation, while the included stainless steel wall plate provides a durable, professional appearance.
Lowell 50LVC Key Features
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50-Watt Power Rating: Designed for speaker circuits with a connected load within the attenuator's rated capacity.
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25V/70V Speaker Compatibility: Suitable for commercial constant-voltage distributed audio systems.
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Mono Autoformer Design: Provides local speaker volume adjustment through stepped attenuation.
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3 dB Volume Steps: Allows gradual adjustment of speaker output levels.
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33 dB Total Attenuation: Includes two 6 dB steps before the off position.
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Rotary Volume Control: Easy-to-use knob with positions from 0 through 10.
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Stainless Steel Wall Plate: Includes a standard one-gang plate with black rotary knob.
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Phoenix-Style Terminal Connectors: Removable screw terminal strips simplify wiring and installation.
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14-Gauge Wire Capacity: Accepts speaker wiring up to 14 AWG.
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Standard Electrical Box Mounting: Fits a compatible one-gang electrical box with at least 2.125 inches of internal depth.
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ETL Listed: Conforms to UL 60065 and UL 2043.
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TAA Compliant: Suitable for projects requiring Trade Agreements Act compliance.
Local Volume Control for Commercial Speaker Systems
The Lowell 50LVC is designed for distributed audio installations where different rooms or areas require independent volume adjustment.
For example, a restaurant may use a central 70V amplifier to supply background music throughout the building while allowing individual dining areas to adjust their speaker levels locally.
By installing a 50LVC in the appropriate speaker line, users can reduce or turn off the volume in that area without adjusting the central amplifier or affecting other independently controlled speaker zones.
This makes the attenuator useful for commercial installations that need simple, accessible volume adjustment without additional electronic controls.
Stepped Attenuation for Consistent Volume Adjustment
The Lowell 50LVC uses an autoformer-based design to provide stepped attenuation of the connected speaker line.
Most volume steps reduce the level by approximately 3 dB, with two additional 6 dB steps before the off position.
This provides a total attenuation range of 33 dB before the control reaches off.
The rotary knob offers clearly defined positions, allowing users to make repeatable adjustments to speaker volume.
Unlike a conventional low-impedance speaker volume control, the 50LVC is specifically designed for 25V and 70V distributed speaker systems.
Easy Installation with Phoenix-Style Connections
The 50LVC features removable Phoenix-style screw terminal strips that allow installers to prepare wiring before connecting the attenuator.
The terminals accommodate speaker wire up to 14 AWG, making the control suitable for many commercial audio installations.
A standard one-gang stainless steel wall plate and rotary knob are included.
The attenuator is designed for installation in a compatible electrical outlet box with a minimum internal depth of 2.125 inches. The electrical box is sold separately.
Lowell 50LVC Technical Specifications
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Specification
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Details
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Manufacturer
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Lowell Manufacturing
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Model
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50LVC
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Product Type
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Mono autoformer speaker volume attenuator
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Power Rating
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50 watts
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Compatible Speaker Systems
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25V and 70V
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Attenuation
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3 dB per step
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Additional Attenuation
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Two 6 dB steps before off
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Total Attenuation
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33 dB before off
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Volume Positions
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0–10
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Control Type
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Rotary dial
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Wire Termination
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Phoenix-style removable screw terminals
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Maximum Wire Size
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14 AWG
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Wall Plate
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Standard one-gang
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Wall Plate Finish
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Stainless steel
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Knob Color
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Black
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Wall Plate Dimensions
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2.75 × 4.5 inches
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Minimum Box Depth
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2.125 inches
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Certifications
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ETL Listed, UL 60065 and UL 2043
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Trade Compliance
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TAA compliant
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Country of Manufacture
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Made in USA with US and global components
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Recommended Applications
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Restaurants and Cafés: Adjust background music volume in dining rooms or seating areas.
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Retail Stores: Provide local volume control for music and paging speakers.
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Offices and Conference Rooms: Manage speaker volume in individual rooms.
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Schools and Educational Facilities: Control audio levels in classrooms and common areas.
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Houses of Worship: Adjust distributed speaker levels in designated areas.
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Commercial Buildings: Provide convenient volume adjustment for 25V/70V paging and music systems.
Selecting the Correct 50W Attenuator
The Lowell 50LVC is rated for a maximum connected speaker load of 50 watts.
When selecting an attenuator for a 70V or 25V speaker system, add together the transformer tap wattages of all speakers connected downstream of the volume control.
The combined speaker load must remain within the attenuator's rated capacity.
For example, four speakers tapped at 10 watts each would represent a total connected load of 40 watts.
The 50LVC is not intended for conventional 4-ohm or 8-ohm speaker circuits.
Why Buy the Lowell 50LVC from Audio Supply?
Audio Supply offers Lowell commercial audio installation products for distributed speaker and paging systems. We can help you select the appropriate volume controls, speakers, and mounting accessories for your installation.
Need a Compatible Wall Box?
The Lowell P1X one-gang surface-mount wall box is a manufacturer-listed mounting accessory for the 50LVC.
For installations requiring surface mounting rather than a recessed electrical box, the P1X provides a compatible mounting option.
Contact Audio Supply for help selecting the correct mounting hardware or additional 25V/70V speaker accessories.
