Current output

[Halla]

Hi,

Can anyone tell me what the current output of a Yamaha rxv 2500 is, and what the current output of an amplifier indicates.

Thank you

 

[mtrycrafts]

Hi,

Can anyone tell me what the current output of a Yamaha rxv 2500 is, and what the current output of an amplifier indicates.

Thank you

Well, it is rated at 130 watts into 8 ohms, so, that would deliver 4A into 8 ohms on a continuous basis, if need be.
Its dynamic rating is 165 watts into 8 ohms which would be 4.5A
260 watts into 4 ohms and that would be 8A.
It also has a dynamic rating into 2 ohms.

The current output means it can deliver that power Nothing more, nothing less.

 

[Johnd]

Well, since it is a seven amp receiver "rated" at 130 wpc, would that not then be 1.1 A x 7 for a maximum potential of 7.7 A? Where's the calculus?

Never mind the accuracy of their purported wattage, let alone the all channels driven debacle. Per paper, I calculate 1.1A x 7 + 7.7 Amps maximum current. Whether that could ever be achieved, or how many amps the recever outputs, and for how long goes to the:

1) accuracy of Yamaha's specifications;
2) the all channels driven question; and,
3) the quality of their capacitors.

Regardless, on a 5.1 system, I doubt if you would sustain half this draw for any length of time, unless you keep it cranked all the time.

 

[Halla]

...I am a bit confused

Well, it is rated at 130 watts into 8 ohms, so, that would deliver 4A into 8 ohms on a continuous basis, if need be.
Its dynamic rating is 165 watts into 8 ohms which would be 4.5A
260 watts into 4 ohms and that would be 8A.
It also has a dynamic rating into 2 ohms.

The current output means it can deliver that power Nothing more, nothing less.

My plinius p10 peak current output is 40A, and it is only a 200 wpc amplifier?

 

[Johnd]

My plinius p10 peak current output is 40A, and it is only a 200 wpc amplifier?

Hey Halla (good morning).

Peak current output has nothing to do with current draw (from the circuit), but has everything to do with the robustness of the capacitors in your amplifiers. Mtry and I started discussing the latter, rather tha the former. The high output is great (and necessary) for those stressful times: the speakers need some push, and the capacitors have plenty to give...in (very) short bursts. In a phrase, you have plenty of dynamic headroom for on call power demand. What are you driving with that amp?

But I'm also a little confused. You first referenced the Yammy 2500, now the Plinius P10. Do you have both? Lucky guy.

 

[Halla]

E855

Hey Halla (good morning).

Peak current output has nothing to do with current draw (from the circuit), but has everything to do with the robustness of the capacitors in your amplifiers. Mtry and I started discussing the latter, rather tha the former. The high output is great (and necessary) for those stressful times: the speakers need some push, and the capacitors have plenty to give...in (very) short bursts. In a phrase, you have plenty of dynamic headroom for on call power demand. What are you driving with that amp?

But I'm also a little confused. You first referenced the Yammy 2500, now the Plinius P10. Do you have both? Lucky guy.

Already 14h00 in Cape Town - Yes I use the p10 with the 2500 for the Jamo E855 fronts, actually tinking of getting other fronts - maybe some B&W's, but I like my speakers to get enough power. An suggestions?

 

[Johnd]

Ahhh...1400. I see that now in your location.

B&W? Love 'em. In fact, it was between B&W and Paradigm for me. I don't know if 'digm is available in your area, but I think you'll be hard pressed to go with most any B&W.

Opinions? On speakers? You ask that question around here, and you'll get twenty different responses. I'm sure you realize it's (speaker preferences) very subjective. I love my Studio 100's with my servo amp.

Depending on your budget?, I would at least listen to the 803D's as a reference...and go from there. What is available in Cape Town? Frankly, imho, you need not look any further than B&W. Not to be trite, but only your ears and your wallet can make that correct decision. Cheers.

 

[no. 5]

but I like my speakers to get enough power. An suggestions?

Find out how reactive the speakers you want/have are; Ohms law dictates how much power an amplifier will provide into a given resistance (as mtry stated), however, an amplifier is usually rated into a purely resistive lode - but speakers are not purely resistive, and their resistance varies with frequency. So, if you can find how difficult the speakers are to drive, you will know how powerful of an amplifier you'll need.

This thread has information on the subject.

 

[mtrycrafts]

My plinius p10 peak current output is 40A, and it is only a 200 wpc amplifier?

Well, that is what it states at one of the sites I found, looks like the Plinius place.
It has no further info what that means. Is it for 2 ch peak? Into what load?

Not hard to find the amps at 300 watts they also claim that would be 8.6A for a continuous power of 300 watts into 4 ohms. For that, it would need 34.6V RMS. Peak volt would be 49V, right? That into 4 ohms would be 12.24A peak and that in turn would be 600watts peak and is still a far cry from 40A peaks.

So, I have no idea where that 40A is coming from and under what conditions, 2ch? 1ch? at clipping? 10%? Into what load?

If that were the case, that would be 1600 watts into a 1 Ohm load
AND 6400 watts into a 4 Ohm load. You think that is what that amp is capable of?

 

[mtrycrafts]

but I like my speakers to get enough power. An suggestions?

How do you know what is 'enough' power for your speaker? Do you know the speaker's limits? At what point will it start to compress and distortion goes through the roof? Its sensitivity? Impedance? Your listening levels?

 

[no. 5]

Well, that is what it states at one of the sites I found, looks like the Plinius place.
It has no further info what that means. Is it for 2 ch peak? Into what load?

Not hard to find the amps at 300 watts they also claim that would be 8.6A for a continuous power of 300 watts into 4 ohms. For that, it would need 34.6V RMS. Peak volt would be 49V, right? That into 4 ohms would be 12.24A peak and that in turn would be 600watts peak and is still a far cry from 40A peaks.

So, I have no idea where that 40A is coming from and under what conditions, 2ch? 1ch? at clipping? 10%? Into what load?

If that were the case, that would be 1600 watts into a 1 Ohm load
AND 6400 watts into a 4 Ohm load. You think that is what that amp is capable of?

Precisely! Watts, Amps, Volts and Ohms are all inseparably related, for a amplifier to deliver "X" number of Amps it must also produce a specific amount of Voltage into the known speaker impedance.

 

[mtrycrafts]

Precisely! Watts, Amps, Volts and Ohms are all inseparably related, for a amplifier to deliver "X" number of Amps it must also produce a specific amount of Voltage into the known speaker impedance.

Some time back, years now, Sunfire cube sub claimed 2500 watts for the amp.
Dr Hsu, of the current sub maker dissected and found that for the amp to do that, the load had to be way less than 1 ohms. Fortunately that driver was not it, nowhere it goes that low.