VR 100 Volume Controls.Available in four power ratings. (12W, 24W, 36W, 50W)Attenuation in 10 steps: 8 x 3dB and 2 x 6dB steps.24V relay fitted for remote attenuator bypass.Supplied with Backing Box.
Volume control should be rated the same or high than the speakerCan be used to switch the speaker off