Electronics > Beginners
Speaker watts same as electrical watts?
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ZeroResistance:
I am looking for a 230 to 110Vac converter / tranformer for these https://www.monoprice.com/product?p_id=605800

Speaker rating is given as total of 120W rms output power.

How much input (electrical) power would these consume, would it be same as the 120W rms output power.
Should I go in for a 110V, 250W transformer considering that each speaker would consume 120W, so a pair would consume a max of 240W (rms).
wraper:
Active speakers should have consumed power rating. Also amplifier efficiency and PSU power factor plays a big role.
wraper:

--- Quote ---Power Requirements   100 ~ 120 VAC, 60Hz or 200 ~ 240 VAC, 50Hz
--- End quote ---
Do you need a transformer at all?
IanB:

--- Quote from: wraper on June 19, 2018, 04:49:30 pm ---
--- Quote ---Power Requirements   100 ~ 120 VAC, 60Hz or 200 ~ 240 VAC, 50Hz
--- End quote ---
Do you need a transformer at all?

--- End quote ---

Snap! I was just about to ask the same question.
wraper:
Actual speaker seem to have 100-120V written on it. In any case I could first take it apart and see if it has a transformer with multiple taps so could be reconfigured for 230V.
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