Amazon.com: Pyle Ceiling and Wall Mount Speaker-8” 2-Way 70V Audio Stereo Sound Subwoofer Sound with Dome Tweeter,600 Watts,in-Wall&in-Ceiling Flush Mount for Home Surround System-Pyle PDIC8LT(White) : Everything Else
audio - Speaker systems: When is 25 volt used vs 70 volt? - Electrical Engineering Stack Exchange