AMPS: High Power Vs High Current?

[speakerman39]

I aced Calculus III and Engineering Mathematics I, but I can't remember anything now to save my life.

These days there is an app for everything.

Back then using Calculators was a big thing. Now we don't even use calculators. Just use apps on phones.

Calc III is Differential Equations from what I remember. However, Cal II kicked my a$$ so bad there never a Calc III my way. The Differential Equations we solved in Calc I were not too bad at all. But, Calc II was a totally different ball game inmho. Oh well, at least I aced Calc I.......LOL!!!!


Cheers,

Phil

 

[mtrycrafts]

IOW: High Power means High Voltage and High Current.

So a "High Current" Amp will have "High Power" and "High Voltage".

There is no such thing as an Amp with High Current, but Low Power and Low Voltage. If the amp has high current, then it's also going to have high power and voltage.

Exactly!!! And visa versa. HP=HI and HV.

Finally we have a good explanation.

 

[PENG]

Nah, that ain't nothing.

He's going to be showing off in his next post when he talks about E=MC^2 and Einstein's Theory of Relativity as it pertains to loudspeakers, power, gravity and all that physics crap.

Actually that one is as popular as Ohm's law so there isn't any point for anyone to show off on that one. My favorite show off topic would probably be Fourier series and transform, and Z transform too. I never understood those topics well until years after graduation. Not too many people know those ugly music waveforms can in fact be represented by the harmonics of sine waves. Without Fourier, there would have been no audiophiles, no cell phones etc. Differential and Integral calculus are much easier relatively speaking.

 

[highfigh]

Just a friendly reminder, everyone knows Ohm's so please remember it is just V=IR for a resistive load, and V=IZ for a reactive load.

Z is a phasor, or incorrectly called, vector, that has the magnitude and phase components.

To calculate power, you can use the power formula P = V x I x Cosine of the phase angle between V and I (the voltage and current phasor)

For a resistive load, the phase angle is virtually 0, and cosine 0 degree is 1

For a reactive load such as the impedance of a loudspeaker, the phase angle can be as high as 60 degree, and cosine 60 degrees = 0.5 so you can do the math and figure out how much watts would end up in the amp instead of the speakers.

You can also see that the phase angle does not factor into the current (I) calculation using Ohm's law, but it obviously affect the power calculations.

ADTG: I hope you aced in trigonometry too.

The Power Cube also takes into account capacitive reactance, too. Rockford made a big point of their amplifiers doing better on these tests than their competitors. I think I still have their manual, so I'll post some of the charts.

 

[PENG]

The Power Cube also takes into account capacitive reactance, too. Rockford made a big point of their amplifiers doing better on these tests than their competitors. I think I still have their manual, so I'll post some of the charts.

Understood..,thanks.

 

[highfigh]

I aced Trigonometry and Analytic Geometry too, but that was 25 years ago when I actually worked part time as a Math Tutor.

Ah, the good old days when I felt a lot smarter.

I did great in Trig, Analytical Geometry, Structural Analysis, Physics, and any class with applications for the math but Algebra and Calc kicked my ass. I had problems with the abstract problems. I can do stuff in my head now that used to give me problems. Must have been all of the head trauma.

 

[PENG]

Pretty funny this subject because my amp is the HCA 1205A amp which stands for high current amp I believe. What that actually means or what that does is way above my pay grade but that is what that means it now Parasound model number.

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Regardless of what HCA means, that amp can be considered literally a high current amp.

 

[highfigh]

You beat me to it as I was getting ready to google PowerCube.........LOL!!!! Got a lot going on this morning. Thanks!


Cheers,

Phil

Just an example of my cat-like reflexes.

 

[Hetfield]

Regardless of what HCA means, that amp can be considered literally a high current amp.

She is a beast for sure. I wish Parasound still made 5 channel amps in the lower end lines like they used to. Now it's only Halo that has 5 channel amps. They are too rich for my blood. If I had to replace this which I don't think I will, I think it'll last for a very long time, I'd have to go with Emotiva or Outlaw audio. I can't touch a Parasound Halo amp.

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[speakerman39]

Just an example of my cat-like reflexes.

That's right! Bruce Lee himself did NOT have nothing on YOU.....LOL!!!!!


Cheers,

Phil

 

[AcuDefTechGuy]

Understood..,thanks.

Did they teach you guys about PowerCubes in Electrical Engineering classes?

I never thought about this before, but both my brother and brother-in-law are electrical engineers, and neither one of them care about Home Theater electronics at all.

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[AcuDefTechGuy]

Actually that one is as popular as Ohm's law so there isn't any point for anyone to show off on that one. My favorite show off topic would probably be Fourier series and transform, and Z transform too. I never understood those topics well until years after graduation. Not too many people know those ugly music waveforms can in fact be represented by the harmonics of sine waves. Without Fourier, there would have been no audiophiles, no cell phones etc. Differential and Integral calculus are much easier relatively speaking.

What? No way. Theory of Relativity is so much more popular. They make movies (Interstellar) and TV shows (Genius) about that.

Sent from my SAMSUNG-SM-N900A using Tapatalk

 

[speakerman39]

Dang this watermelon is delicious! So darn sweet. Might have to have another piece......LOL!!!!! Anyone here like watermelon too?


Cheers,

Phil

 

[PENG]

Did they teach you guys about PowerCubes in Electrical Engineering classes?

I never thought about this before, but both my brother and brother-in-law are electrical engineers, and neither one of them care about Home Theater electronics at all.

Sent from my SAMSUNG-SM-N900A using Tapatalk

No, too practical I guess. Back in those days they taught mostly theories in universities.

 

[PENG]

Dang this watermelon is delicious! So darn sweet. Might have to have another piece......LOL!!!!! Anyone here like watermelon too?


Cheers,

Phil

Thanks for the reminder, I have some in the fridge, going for it now.

 

[PENG]

What? No way. Theory of Relativity is so much more popular. They make movies (Interstellar) and TV shows (Genius) about that.

Sent from my SAMSUNG-SM-N900A using Tapatalk

I have to agree..

 

[PENG]

She is a beast for sure. I wish Parasound still made 5 channel amps in the lower end lines like they used to. Now it's only Halo that has 5 channel amps. They are too rich for my blood. If I had to replace this which I don't think I will, I think it'll last for a very long time, I'd have to go with Emotiva or Outlaw audio. I can't touch a Parasound Halo amp.

You should be able to get the HCA2205 that is essentially a A51 if you look closely at the specs. That's a 85 lbs beast.

 

[Hetfield]

You should be able to get the HCA2205 that is essentially a A51 if you look closely at the specs. That's a 85 lbs beast.

Yeah that is a sweet amp. Buying used isn't something I normally do but I won't replace the 1205 unless it goes bad on me. I'm good right now.

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[speakerman39]

Thanks for the reminder, I have some in the fridge, going for it now.

That is the least I can do after all of the times you have helped me. Enjoy!


Cheers,

Phil

 

[speakerman39]

I aced Trigonometry and Analytic Geometry too, but that was 25 years ago when I actually worked part time as a Math Tutor.

Ah, the good old days when I felt a lot smarter.

Darn it! Are you (me included) getting that old already............LOL???? I mean 25-years like where did the time go?


Cheers,

Phil