Speakers at 3 ohm resistance, how do I calculate power given by an amp?

Question

Lets say the amp puts out 150 watts x 2 @ 4 ohms and
275 watts x 2 @ 2 ohms (Specs from an actual amp) is it safe for me to assume that the wattage will be right in the middle of the 4 and 2 ohm rating? Or is there a way to calculate this a better way?

Answer 1

Yes, just take the average of the two wattages.

(150+275) / 2 = 212.5

Answer 2

Wow - some sturdy questions. enable me clarify some concepts that would desire to help. "audio gadget exchange their impedance" An 8 ohm speaker is purely 8 ohms whilst enjoying a million frequency of sound. the full phraseology is that a speaker is 8 ohms "nominal". think of of "nominal" as user-friendly. A "comprehensive-variety" speaker has a tweeter, mid-variety and a woofer. frequently: Woofer - is 3-6 ohms Mid-variety - is 7-10 ohms Tweeter - is 11-30 ohms So the impedance of a speaker relies upon on which driving force is producing the sound at that 2d. The closer you get to 0 ohms - the closer you're to a short-circuit which could over-warmth your kit and shrink the existence span. right it somewhat is the different thought: "Amp ability variations whilst impedance of the audio gadget exchange". there is not any such element as a "8 ohm" amp or a "4 ohm" amp. you are able to bypass to the Yamaha website and for an identical AV Receiver see something like right here: 80 watts@ 8 ohms non-inductive load a hundred and twenty watts@6 ohms non-inductive load a hundred and fifty watts@4 ohms non-inductive load See the way it fairly works? word: "non-inductive" capacity they used a fixed resistor to degree. This gets rid of the priority that audio gadget exchange impedance at diverse frequencies. Your question states "If an amp says 4 ohms".... yet it somewhat is mindless via itself. you're lacking that someplace in the documentation - there's a ability score that the amp grants to output whilst hooked as much as a 4 ohm load. that very same amp can paintings with 6 ohm audio gadget and eight ohm audio gadget. it fairly is virtually continually risk-free to apply 6 or 8 ohm nominal audio gadget on any good amp. desire this facilitates.

Answer 3

sparky3489 may be correct. I really not sure what you try to ask.
Power Factor=Resistance in Ohms / Impedance in Ohms?
Power Factor=power in watts / (current in amps x volts)?
Power Factor= cos (Phase Angle)?
Power Factor= True Power / Apparent Power?
Hope you understand, if, not, just look at what the speakers handle as most people do. Sorry, this all I know.

Answer 4

i think it would be absolutly safe because an amp powered 7/8ths of a milisecond divided by 6/16ths of what ever you want to divide it by is approximetly 5/7ths of some number thus leaving us with a total of185,000 octegons also multiplied by a few of them squares. did this help you out? if not just visit www.i dont know what the **** i'm takling about.com this site should give you all the load of crap you need. take care now son.

Answer 5

Pff i donna dude my amp puts out 650 watts.