The Russound ALT-70V-50 gives a room or zone its own volume adjustment on a commercial or residential 70-volt speaker system. It installs in a standard wall box and sits between the 70V amplifier line and the local speakers, letting occupants turn a space down without affecting the rest of the building.
Eleven attenuation steps use make-before-break switching, so the signal is never momentarily interrupted as the knob turns. Wiring is handled by a removable four-pole screw-down connector that takes up to 12 AWG cable, which makes pre-wiring and service simple. Although designed for 70V lines, the control can also be used on 25V or 100V systems provided the total speaker load wired through it does not exceed 50 watts. White, light almond and ivory plates and knobs are all in the box so it can match the room's other devices. Insertion loss is rated below 0.5 dB. Inside is an autoformer rated for 50 watts, enough for up to six speakers tapped at 7.5 W or twelve at 3.75 W, and it can serve as a master control over sub-zones as long as the combined load stays within 50 W. The Decora-style design fits a single-gang 18 cubic inch box and pairs with other Decora devices or multi-gang plates. It is meant for indoor use, but can go outdoors under a properly designed weatherproof device cover.
Key Features
- 50 W rating for 70V constant-voltage lines
- 11-step attenuator, make-before-break
- 25V/100V use at 50 W or less total load
- Removable screw-down terminal, up to 12 AWG
- Three trim colours included
Ideal Applications
Zone volume for restaurants, retail floors, offices, conference rooms, houses of worship, schools and larger homes that use a 70V paging or background music amplifier.
Compatibility
Works with 70V (and, within the 50 W limit, 25V or 100V) amplifiers and transformer-equipped speakers, including Russound 70V/100V speakers. Not for direct-coupled 4/8-ohm speaker systems. Fits a single-gang 18 cu in junction box (about 2.33 in depth behind the plate).