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Author Topic: Power Rating in AMPS for DBR12  (Read 1323 times)

Peter Z Collins

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Power Rating in AMPS for DBR12
« on: March 05, 2019, 05:26:13 am »

Anyone know the power rating in amps for the Yamaha DBR12 speakers and the DXS12 MKII Sub ?

I am trying to find a suitable AVR and conditioner
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Mac Kerr

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« Reply #1 on: March 05, 2019, 11:21:00 am »

I am trying to find a suitable AVR and conditioner

Please go to your profile and change the "Name" field to your real first and last name as required by the posting rules displayed in the header at the top of the section, and in the Site Rules and Suggestions in the Forum Announcements section, and on the registration page when you registered.

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Lyle Williams

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Re: Power Rating in AMPS for DBR12
« Reply #2 on: March 12, 2019, 04:28:12 am »

Anyone know the power rating in amps for the Yamaha DBR12 speakers and the DXS12 MKII Sub ?

I am trying to find a suitable AVR and conditioner

Why would you do that?  Don't they both have autoranging switched-mode power supplies?

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Chris Grimshaw

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Re: Power Rating in AMPS for DBR12
« Reply #3 on: March 12, 2019, 06:11:20 am »

The DBR12 pulls 74w when run up to 1/8th average power. ie, just clipping a signal with a 9dB crest factor.
The DXS12 MkII pulls 100w under the same conditions.

I'll leave it up to the reader to determine whether those conditions are realistic or applicable - I'm not willing to spoon-feed all the answers when finding the numbers was as easy as searching "[model] manual" and scrolling to the correct part.

Chris
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Jean-Pierre Coetzee

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Re: Power Rating in AMPS for DBR12
« Reply #4 on: March 14, 2019, 07:13:23 am »

I will assist some more with a formula.

P=I*E

P = Power(watts)
I  = Current(amps)
E = Voltage(volts)

Now you need to figure out basic algebra and how to use a calculator
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Mike Sokol

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Re: Power Rating in AMPS for DBR12
« Reply #5 on: March 14, 2019, 10:35:41 am »

I will assist some more with a formula.

P=I*E

P = Power(watts)
I  = Current(amps)
E = Voltage(volts)

Now you need to figure out basic algebra and how to use a calculator

Here's the Ohm's Law chart which is what all my basic audio electronics students learn.
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Mike Sokol
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Stephen Swaffer

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Re: Power Rating in AMPS for DBR12
« Reply #6 on: March 14, 2019, 12:16:50 pm »

Just a pet peeve of mine-why is that chart easier to learn than:

P=I*E
E=I*R

and use basic algebra?

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Steve Swaffer

Bob Taylor

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Re: Power Rating in AMPS for DBR12
« Reply #7 on: March 15, 2019, 03:28:50 pm »

I will assist some more with a formula.

P=I*E

P = Power(watts)
I  = Current(amps)
E = Voltage(volts)

Now you need to figure out basic algebra and how to use a calculator

Actually this gives you Volt Amps.

Now the Electrical Engineer side of me wants to toss in that this actually only works with DC to get to Watts. When you look at Watts in AC, It's Volts times Amps times Power Factor. Power Factor is the Cosine of the Angle between Volts and Current. Capacitive circuits will lead in Power Factor, (Current is ahead of Voltage) Inductive Lags in Power Factor.(Voltage ahead of Current) This is why Generators have 2 power ratings, KVA and Watts. Don't exceed either to live long and prosper.

Speakers are Reactive, Meaning they can have Inductive or Capacitive traits. Just measuring the Voltage, and using that across the specified Impedance may be close, but there is much more happening in that circuit.

AC power is a different animal than DC, Just keep that in mind as terms are tossed freely around. Current times Volts will get close, but could also kill you for not knowing there is a difference.

Bob T
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Lyle Williams

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Re: Power Rating in AMPS for DBR12
« Reply #8 on: March 15, 2019, 04:03:29 pm »

Start with the fundamental question.  Why does the OP want an AVR/conditioner on autoranging/switched-mode supplies?

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Scott Holtzman

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Re: Power Rating in AMPS for DBR12
« Reply #9 on: March 16, 2019, 04:57:21 am »

Actually this gives you Volt Amps.

Now the Electrical Engineer side of me wants to toss in that this actually only works with DC to get to Watts. When you look at Watts in AC, It's Volts times Amps times Power Factor. Power Factor is the Cosine of the Angle between Volts and Current. Capacitive circuits will lead in Power Factor, (Current is ahead of Voltage) Inductive Lags in Power Factor.(Voltage ahead of Current) This is why Generators have 2 power ratings, KVA and Watts. Don't exceed either to live long and prosper.

Speakers are Reactive, Meaning they can have Inductive or Capacitive traits. Just measuring the Voltage, and using that across the specified Impedance may be close, but there is much more happening in that circuit.

AC power is a different animal than DC, Just keep that in mind as terms are tossed freely around. Current times Volts will get close, but could also kill you for not knowing there is a difference.

Bob T
Bob, have you ever heard ELI the Iceman pneumonic for current lead/lag?

Sent from my VS996 using Tapatalk

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Scott AKA "Skyking" Holtzman
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