DIY Bass Traps and Acoustic Panels Best Acoustic Treatment 7x white in-ceiling/in-wall speakers hifi home surround sound cinema 952.184 power rms 100v line 20w. Spring loaded terminals for easy connection. Rotary selector switch for 100V line tappings or 8 ohms. Power rms 8 Ohms 40W. The seller is commsandsound and is located in this country GB.