Question about Audio Players & Recorders
There could be several answers to this question depending on where the figure 150w appears and what other information is with it.
If the figure is next to something like AC100v or 220v then this is the mains power consumption rating - there is no direct correlation to output power because it will depend on the other components in the system and how they are configured.
If it is on the output stage of the amplifier (where the loudspeakers connect) then it could be a either the total of all the channels added together or a per channel rating. If it is an output power it will normally also have the word "at" followed by another number and the symbol ω (or the word ohms). The actual output achieved will vary depending on the resistance of the loudspeakers (for example an amp rated at 150watts at 8 ohms would only be able to push about 75 watts into 16 ohms but 300 watts into 4 ohms)
Further the rated power could be quoted either in Peak output (also known as peak music power or pmp) or, alternatively it may have the letters RMS (Root Mean Square) which roughly equates to 300watts Peak.
Cheaper units tend to quote Peak outputs because it makes them look more powerful than they really are. RMS is generally the power output rating used by high quality equipment and professional musicians because it gives a better indication of general usable power.
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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