{"title":"Attenuators","description":null,"products":[{"product_id":"rdl-ru-vca2a-001-3455","title":"RDL RU-VCA2A Digitally Controlled Attenuators","description":"\u003cp\u003eThe RU-VCA2A is a full-featured studio-quality dual-channel audio attenuator module for local and\/or remote control of balanced or unbalanced line-level sources. Each module can be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment. Audio levels are controlled in 0.5 dB steps using noiseless zero-crossing digital attenuators for optimum reliability, precise tracking and long-term click-free service. Exceptional wide-band low-noise performance makes the RU VCA2A suited to level adjustment in the most demanding applications. Rear-panel inputs and outputs may each be wired balanced or unbalanced. The RU-VCA2A powers up in one of two operating modes set by a rear-panel switch. MOM (momentary) Mode In the MOM (momentary) mode, audio level is controlled by momentary pushbuttons or pulses. Remote terminals and front-panel pushbuttons are provided for up and down ramping control. If either button is held in, the audio will ramp automatically. If a button is pulsed (\u0026lt; 0.5 second), the audio will increment one step. The time of both the UP and DOWN ramps is individually adjustable on the front panel. Pushing remote UP and DOWN buttons simultaneously, or pressing the front-panel GO TO PRESET button, returns the audio to a preset level. The preset level is stored by adjusting the desired level using the UP and DOWN buttons, then pressing and holding the front-panel PRESET button for 3 seconds. A rear-panel switch sets the audio power-up level to either the preset level or the last level setting used. Multiple remote control locations are possible in the MOM mode. External control pulses may be either of positive polarity or pulled-to-ground (open-collector). 0 to 10 VDC Mode In the 0 to 10 VDC mode the preset function is disabled and the audio level is controlled by a remote 10 k\u0026amp;ohm; linear taper pot or by 0 to 10 Vdc. A single remote control location is possible using a remote 10 k\u0026amp;ohm; pot. In both operating modes, two separate 0 to 10 Vdc outputs are provided. The linear RAMP output drives the level display on RDL remote controls; the EQ RAMP output is used to control an automatic RDL Loudness Equalizer (see ST LEQ1). A front-panel 10-LED string display indicates the relative audio level. Control expansion is possible using the EXTERNAL CONTROL DATA jacks. One module can be set as a MASTER module to control the level of one or more additional RU-VCA2A or RU VCA6A modules set to the SLAVE mode. Use the RU-VCA2A individually, or combine it with other RDL products as part of a complete system.\u003c\/p\u003e","brand":"Radio Design Labs","offers":[{"title":"Default Title","offer_id":52416036765880,"sku":"77423","price":463.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/77423_ru-vca2a_ecd78f24-779a-4914-8a2f-6e4d52a63d40.jpg?v=1769535117"},{"product_id":"alfatron-electronics-alvc-30","title":"Alfatron Surface Mount 100V Stepped Attenuator | 30W","description":"\u003cp\u003eThe Alfatron Electronics Surface Mount 100V Stepped Attenuator series is designed for integrators and AV installers working with constant-voltage distributed audio systems. These units pass the amplified 100V line signal directly, using a step-up\/step-down controller to give occupants local volume control at each zone endpoint. The series is offered in multiple wattage ratings so installers can select the correct unit for the speaker load in each zone without over- or under-specifying the attenuator.\u003c\/p\u003e\u003cp\u003eThe surface mount form factor and included back box make these attenuators well suited for classroom, retail, hospitality, house of worship, and commercial office installations where a discreet, wall-mounted volume control is required at individual listening zones. Unlike passive inline attenuators, the signal actively passes through the stepped control, providing consistent level adjustment across the attenuation range. This design approach keeps installations tidy and allows for straightforward replacement or upgrade without rewiring the speaker circuit.\u003c\/p\u003e\u003cp\u003eFor AV integrators specifying 100V line systems, the Alfatron Electronics stepped attenuator series offers a practical, appropriately rated zone control solution across a range of wattage options, reducing the need for external volume control modules or amplifier channel splitting on smaller distributed audio builds.\u003c\/p\u003e","brand":"Alfatron Electronics, Inc.","offers":[{"title":"30W","offer_id":52449622098104,"sku":"111997","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/111997_Alfatron-Electronics-Surface-Mount-100V-Stepped-Attenuator-30W_ALT01sqr.jpg?v=1788970994"},{"product_id":"alfatron-electronics-alvc-60","title":"Alfatron Surface Mount 100V Stepped Attenuator | 60W","description":"\u003cp\u003eThe Alfatron Electronics Surface Mount 100V Stepped Attenuator series is designed for integrators and AV installers working with constant-voltage distributed audio systems. These units pass the amplified 100V line signal directly, using a step-up\/step-down controller to give occupants local volume control at each zone endpoint. The series is offered in multiple wattage ratings so installers can select the correct unit for the speaker load in each zone without over- or under-specifying the attenuator.\u003c\/p\u003e\u003cp\u003eThe surface mount form factor and included back box make these attenuators well suited for classroom, retail, hospitality, house of worship, and commercial office installations where a discreet, wall-mounted volume control is required at individual listening zones. Unlike passive inline attenuators, the signal actively passes through the stepped control, providing consistent level adjustment across the attenuation range. This design approach keeps installations tidy and allows for straightforward replacement or upgrade without rewiring the speaker circuit.\u003c\/p\u003e\u003cp\u003eFor AV integrators specifying 100V line systems, the Alfatron Electronics stepped attenuator series offers a practical, appropriately rated zone control solution across a range of wattage options, reducing the need for external volume control modules or amplifier channel splitting on smaller distributed audio builds.\u003c\/p\u003e","brand":"Alfatron Electronics, Inc.","offers":[{"title":"60W","offer_id":52449622163640,"sku":"111998","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/111998_Alfatron-Electronics-Surface-Mount-100V-Stepped-Attenuator-60W_ALT01sqr.jpg?v=1788970998"},{"product_id":"alfatron-electronics-alvc-120","title":"Alfatron Surface Mount 100V Stepped Attenuator | 120W","description":"\u003cp\u003eThe Alfatron Electronics Surface Mount 100V Stepped Attenuator series is designed for integrators and AV installers working with constant-voltage distributed audio systems. These units pass the amplified 100V line signal directly, using a step-up\/step-down controller to give occupants local volume control at each zone endpoint. The series is offered in multiple wattage ratings so installers can select the correct unit for the speaker load in each zone without over- or under-specifying the attenuator.\u003c\/p\u003e\u003cp\u003eThe surface mount form factor and included back box make these attenuators well suited for classroom, retail, hospitality, house of worship, and commercial office installations where a discreet, wall-mounted volume control is required at individual listening zones. Unlike passive inline attenuators, the signal actively passes through the stepped control, providing consistent level adjustment across the attenuation range. This design approach keeps installations tidy and allows for straightforward replacement or upgrade without rewiring the speaker circuit.\u003c\/p\u003e\u003cp\u003eFor AV integrators specifying 100V line systems, the Alfatron Electronics stepped attenuator series offers a practical, appropriately rated zone control solution across a range of wattage options, reducing the need for external volume control modules or amplifier channel splitting on smaller distributed audio builds.\u003c\/p\u003e","brand":"Alfatron Electronics, Inc.","offers":[{"title":"120W","offer_id":52449622196408,"sku":"111999","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/111999_Alfatron-Electronics-Surface-Mount-100V-Stepped-Attenuator-120W_ALT01sqr.jpg?v=1788970989"},{"product_id":"lowell-100lvc-rm","title":"Lowell 100W Mono Volume Control With Adhesive Dial Scale For 70V | Without Bypass","description":"\u003cp\u003eLowell's 100W mono autoformer attenuator volume control is designed for installed audio professionals managing distributed speaker systems on 25V or 70V lines. With a rotary dial providing 0-10 volume positions and 3dB-per-step attenuation, it gives system integrators precise, repeatable level control at each endpoint without requiring additional amplification or complex DSP infrastructure.\u003c\/p\u003e\u003cp\u003eThe phoenix-style plug-in screw termination strips simplify field wiring and support 14-gauge conductors, making this control practical for both new installations and retrofit projects in commercial facilities, houses of worship, retail environments, and educational buildings. The included adhesive dial scale features a pocket for a paper label, so each control can be clearly identified at the installation point, reducing confusion during commissioning and ongoing maintenance.\u003c\/p\u003e\u003cp\u003eAvailable with or without an emergency bypass relay, the range accommodates installations where life-safety code compliance or paging override capability is required as well as standard background music zones where bypass is unnecessary. This flexibility makes the family a reliable choice across a wide range of project types without forcing over-specification on simpler zones.\u003c\/p\u003e","brand":"Lowell Manufacturing Co.","offers":[{"title":"Without Bypass","offer_id":52450988294328,"sku":"147714","price":62.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/34196_LOWELL-100LVC-SA_ALT01sqr.jpg?v=1784841120"},{"product_id":"biamp-920-01949-00001","title":"Biamp Voltera A 300.4 Four-Channel 300W Amplifier","description":"\u003cp\u003eThe Voltera A 300.4 addresses the need for adaptable amplification in commercial environments where loudspeaker types, mounting constraints, and acoustic sensitivity vary. Its four Class D channels support mixed-load systems with independent per-channel selection of 100 V, 70 V, 8-ohm, or 4-ohm operation, eliminating the need for separate amplifiers when distributed and low-impedance speakers coexist in the same installation.\u003c\/p\u003e\u003cp\u003ePower sharing mode allows any channel to deliver up to 150 watts when additional output is required, providing twice the symmetric allocation without reconfiguring the system. Manual per-channel controls including high-pass filtering, gain trim with up to 3 dB boost, and fixed 4 dBu input sensitivity ensure repeatable commissioning and predictable behavior across diverse source equipment and loudspeaker models.\u003c\/p\u003e\u003cp\u003eThe half-rack chassis ships with mounting solutions for standard 19-inch racks and remote placement behind displays, under tables, above ceilings, or within furniture. Thermally controlled fan operation supports whisper mode for noise-sensitive applications such as conference rooms and private offices, while TAA compliance, CE marking, UL listing, and 5-year warranty coverage meet institutional procurement and reliability requirements for long-term commercial deployments.\u003c\/p\u003e","brand":"Biamp Systems","offers":[{"title":"Default Title","offer_id":52451771383992,"sku":"152490","price":1378.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/152490_BIAMP-Voltera-A-300.4_ALT01.jpg?v=1782918336"},{"product_id":"rdl-ru-vca6a-digitally-controlled-6-channel-audio-attenuator","title":"RDL GENETIXGN10P RDL RU-VCA6A","description":"\u003cp\u003eRDL RU-VCA6A | Digitally Controlled 6 Channel\u003c\/p\u003e","brand":"Radio Design Labs","offers":[{"title":"Default Title","offer_id":53345747861688,"sku":"205028","price":747.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/RU-VCA6A_a50bcfa5-f74a-4f61-bd0b-f0549f499af2.webp?v=1785873832"},{"product_id":"sonance-92158","title":"Sonance VC60RIM 60W In-Wall Rotary Impedance Matching Volume Control","description":"\u003cp\u003eThe Sonance VC60RIM is a 60-watt impedance matching volume control designed for AV integrators and installers working on residential or commercial distributed audio systems. It mounts in-wall or in-ceiling, making it a practical solution for multi-zone audio where individual room control is required without adding a separate amplifier stage at each location.\u003c\/p\u003e\u003cp\u003eThe rim-mount construction keeps the unit flush and unobtrusive, and the white paintable finish allows it to blend into any decor. The screwdriver-adjustable impedance matching eliminates the need for additional impedance correction hardware, simplifying system design and reducing installation time on multi-speaker runs. Its compatibility with Sonance distributed audio systems makes it a natural fit for integrators already working within that ecosystem.\u003c\/p\u003e\u003cp\u003eCompared to standard passive attenuators, the VC60RIM's impedance matching capability protects amplifier loads and maintains consistent performance across multiple speaker zones. For integrators specifying whole-home audio or background music systems in commercial environments, this control provides a reliable, code-friendly in-wall solution that keeps wiring tidy and operation straightforward for end users.\u003c\/p\u003e","brand":"SONANCE","offers":[{"title":"Default Title","offer_id":53960046903480,"sku":"208539","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/208539_Sonance-VC60RIM-60W-In-Wall-Rotary-Impedance-Matching-Volume-Control_ALT01sqr.jpg?v=1787351719"},{"product_id":"alfatron-electronics-surface-mount-100v-stepped-attenuator-parent","title":"Alfatron Electronics Surface Mount 100V Stepped Attenuator","description":"\u003cp\u003eThe Alfatron Electronics Surface Mount 100V Stepped Attenuator series is designed for integrators and AV installers working with constant-voltage distributed audio systems. These units pass the amplified 100V line signal directly, using a step-up\/step-down controller to give occupants local volume control at each zone endpoint. The series is offered in multiple wattage ratings so installers can select the correct unit for the speaker load in each zone without over- or under-specifying the attenuator.\u003c\/p\u003e\u003cp\u003eThe surface mount form factor and included back box make these attenuators well suited for classroom, retail, hospitality, house of worship, and commercial office installations where a discreet, wall-mounted volume control is required at individual listening zones. Unlike passive inline attenuators, the signal actively passes through the stepped control, providing consistent level adjustment across the attenuation range. This design approach keeps installations tidy and allows for straightforward replacement or upgrade without rewiring the speaker circuit.\u003c\/p\u003e\u003cp\u003eFor AV integrators specifying 100V line systems, the Alfatron Electronics stepped attenuator series offers a practical, appropriately rated zone control solution across a range of wattage options, reducing the need for external volume control modules or amplifier channel splitting on smaller distributed audio builds.\u003c\/p\u003e","brand":"Alfatron Electronics, Inc.","offers":[{"title":"120W","offer_id":52449622196408,"sku":"111999","price":34.99,"currency_code":"USD","in_stock":true},{"title":"30W","offer_id":52449622098104,"sku":"111997","price":22.99,"currency_code":"USD","in_stock":true},{"title":"60W","offer_id":52449622163640,"sku":"111998","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/111999_Alfatron-Electronics-Surface-Mount-100V-Stepped-Attenuator-120W_ALT01sqr.jpg?v=1788970989"}],"url":"https:\/\/soundpro.com\/collections\/attenuators.oembed","provider":"SoundPro","version":"1.0","type":"link"}