Niles Audio SVL-1 Speaker Volume Control Line-Level Attenuator

Niles SVL-1 Speaker-Level Volume Control – Black – Home Audio

Niles SVL-1 Speaker-Level Volume Control

Niles DPS-1 Amplifier / Speaker Selector A/B Switch

Niles SVL-6 6-Zone Speaker Selector and Volume Control System - UNTESTED

Niles Audio SVC-1 Home Theater Volume Control - Black Metal

Niles SS-4, 4-Pair Speaker selector

Vintage Late 60s Home Audio Stereophonic Speaker Selector / Toggle W/ Wires