It depends on the environment, a 2 watt speaker is usually smaller and more portable but a 12.5 watt speaker is louder and usually has better sound quality.
They may vary according to system. In my non-Bose factory system, it is a 6" Clarion speaker. they are rated at 2 ohms and 40 watts max (25 watts nominal).
2 Watts RMS (it has only a 5 inch speaker, but for home practice, it's easily loud enough)
The Rockford Fosgate R150-2 2-channel amp puts out 50 watts RMS per channel to your speaker system, or you can bridge it to supply 150 watts RMS to a subwoofer.
Power (Watts)/ Decibels (if the speaker is efficient) 2 Watts = 93 decibels 4 Watts = 96 decibels 8 Watts = 99 decibels 16 Watts = 102 decibels 32 Watts = 105 decibels 64 Watts = 108 decibels 128 Watts = 111 decibels 256 Watts = 114 decibels 512 Watts= 117 decibels 1024 Watts = 120 decibels Some Volumes to Compare 10 decibels = normal human breathing 60 decibels = normal human conversation 110 decibels = power saw, car horn, shouting in ear, 120 decibels = jet aircraft close by, emergency vehicle siren, rock concert
It depends on the model speaker. The speaker has an RMS amperage rating used for choosing the amp size needed. You would want to choose the upper number if there is a range. For example 50-200 rms watts, choose an amp with 200 watts. It is worse for the speaker to have too little than too many amps. Crutchfield even recommends 75%-150% of the RMS rating. You will also need to know the OHMs of the speaker when choosing the amp. There are sub woofers rating at 2 and other rated for 4 OHMS and have different amp requirements.
These are not convertible quantities. The same way that you cannot convert seconds into pounds. Or pounds into miles per hour. If you reconstituted your question into the form of "I have a device that draws 2 amps at 125 volts, how many Watts is it consuming?" we'd be off to the races. Hope that helps.
Two resistors in series, one 5 ohms and one 2 ohms, with a current of 5 amperes, will have a power dissipation of 175 watts. Ohm's law: Voltage = current times resistance E1 = I R1 = (5) (5) = 25 volts E2 = I R2 = (5) (2) = 10 volts Power law: Power = current times voltage P1 = I E1 = (5) (25) = 125 watts P2 = I E2 = (5) (10) = 50 watts PT = P1 + P2 = 125 + 50 = 175 watts
Yes, half of 250 is 125. To prove it: use a calculator and calculate 125 times 2.
watts = volts x amps, example-2 watts=2 volts x 1 amp, example- 2 watts=120 volts x .60 amp.
500 and 27 watts
2,000 kw is 2,000 kilo watts is 2,000,000 watts
2 is 1.6% of 125.