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Will my electric bill go 'sky high' by leaving my subwoofer plugged in all the time?

No. MartinLogan subwoofers, when the power switch is set to 'Auto' or 'Standby', will draw about 10 watts when idle (depending on model).

Uncompromising performance. Unflinching accuracy. Unwavering reliability. Harnessing the myriad technical advantages of electrostatic principles to recreate sound in its truest form—this is what MartinLogan is all about.