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Author Topic: Converting amps needed based on ohm change  (Read 573 times)

Tim McCulloch

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Re: Converting amps needed based on ohm change
« Reply #10 on: August 03, 2017, 09:20:29 pm »

^^^

This from the "I'm not the amplifier guy."  8)

JR, you just illuminated a lightbulb over my head.  Thanks.  I think... :D
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John Roberts {JR}

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Re: Converting amps needed based on ohm change
« Reply #11 on: August 04, 2017, 12:13:27 am »

^^^

This from the "I'm not the amplifier guy."  8)

JR, you just illuminated a lightbulb over my head.  Thanks.  I think... :D
sorry it's probably too late, class D makes multi-tier class H obsolete....    8)

JR

PS: I am not the "speaker" guy, I can find my way around power amps.
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Chris Hindle

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Re: Converting amps needed based on ohm change
« Reply #12 on: August 04, 2017, 08:18:26 am »


PS: I am not the "speaker" guy, I can find my way around power amps.

Nicely worded, for the understatement of the year......  ;)
Chris.
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Tim McCulloch

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Re: Converting amps needed based on ohm change
« Reply #13 on: August 04, 2017, 10:23:37 am »

sorry it's probably too late, class D makes multi-tier class H obsolete....    8)

JR

PS: I am not the "speaker" guy, I can find my way around power amps.

I'm not getting design ideas, John.  It's the way you sussed out the approximate points where the power supply rails switch that helped me with an unrelated trouble shooting problem.  Kind of  a liberal arts education thing - learning allows interpolation.
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"Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. Sing in the shower. Dance to the radio. Tell stories. Write a poem to a friend, even a lousy poem. Do it as well as you possible can. You will get an enormous reward. You will have created something."  - Kurt Vonnegut

David Allred

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Re: Converting amps needed based on ohm change
« Reply #14 on: August 04, 2017, 11:46:57 am »

sorry it's probably too late, class D makes multi-tier class H obsolete....    8)

JR


Are you putting down my amps, like they are obsolete and that I might not should have made a recent purchase of them?   :P :'(
I have had them for many years.   Relatively new product at the time.  Just in the middle of a major reconfig (digital mixer) and seeing if 3 amps on a 15A circuit is doable.
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John Roberts {JR}

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Re: Converting amps needed based on ohm change
« Reply #15 on: August 04, 2017, 02:11:39 pm »

Are you putting down my amps, like they are obsolete and that I might not should have made a recent purchase of them?   :P :'(
I have had them for many years.   Relatively new product at the time.  Just in the middle of a major reconfig (digital mixer) and seeing if 3 amps on a 15A circuit is doable.

Back last century when class D was expensive "gee whiz" technology, it was mostly a premium expensive solution.  Now that the technology has caught up and become cost effective it does IMO obsolete the old ways. From a purely engineering perspective a multiple tier class H or class G amplifier (similar but different) involves more complexity with additional points of failure than modern class D, so arguably more expensive to sell and less reliable.

That said do not throw away your amps, but if somebody offers you top dollar for them, don't chase them away.  8)

Back when I was product manager over all Peavey power amps I did some bench comparisons between class D and multi-rail designs. And the efficiency benefits to class D was not a much as touted. The class D technology from decades ago had idle energy dissipation that diminished the efficiency benefit for modest power output.

Now I see cost effective class D being a win-win-win... simpler, cheaper, and more efficient. I am mainly angry that I didn't have today's class D technology to sell back last century.  >:(

JR
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