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Author Topic: yet another way to describe amp power  (Read 3404 times)

Keith Broughton

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yet another way to describe amp power
« on: July 02, 2017, 11:55:48 am »

Recently found in amplifier description...

Quote
Unusually these are not, ‘transient’, ‘burst’ or ‘peak’ power figures, they are the power levels that are delivered by both channels simultaneously even when driven with the same dense program material.
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Tim Weaver

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Re: yet another way to describe amp power
« Reply #1 on: July 02, 2017, 12:16:41 pm »

Wut?



Why is it a problem to just say XX watts at X ohms with X% distortion?
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Ivan Beaver

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Re: yet another way to describe amp power
« Reply #2 on: July 02, 2017, 12:39:24 pm »

Recently found in amplifier description...
Is this a review or in a spec?

Either way, it needs a lot more explanation
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Ivan Beaver
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Keith Broughton

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Re: yet another way to describe amp power
« Reply #3 on: July 02, 2017, 01:03:12 pm »

Is this a review or in a spec?

Either way, it needs a lot more explanation
This is from a description of a power amplifier on the product page of an amplifier manufacturer.
They use it on each of their model pages.
A bit of WTF from my POV!
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David Sturzenbecher

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Re: yet another way to describe amp power
« Reply #4 on: July 02, 2017, 01:16:24 pm »

Recently found in amplifier description...

Just cut to the chase.

http://linea-research.co.uk/44c-series/

Weren't these the same guys that gave the confusing specs that included crest factor into some other manufactures OEM amp?
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John Roberts {JR}

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Re: yet another way to describe amp power
« Reply #5 on: July 02, 2017, 02:15:29 pm »

It seems I have been writing about this subject a very long time. No not specmanship, but the difficulty in coming up with meaningful power duty cycle specs for use in live sound reinforcement.

Back last century, because consumers rewarded them for it, amp makers stopped designing continuous duty (24x7)  amplifiers and sold amps that made significantly more power for significantly less time. While extremely short term burst power could be abused, the market place would sort out what amps are wimps soon enough.

Marketing copy is rarely written by engineers and in this case it probably wouldn't help because AFAIK there is no concise spec that is meaningful across multiple genres and applications, and many have tried. Back in the 70's the hifi industry proposed a dynamic headroom spec and that kind of worked where everybody was running amps full range into modest (one box per channel) loads, playing pre-recorded music. In live sound the loading is all over the place and playback bandwidths too.

I wouldn't lose too much sleep, or read too much into these latest adventures in copywriting.

JR
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Roland Clarke

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Re: yet another way to describe amp power
« Reply #6 on: July 02, 2017, 03:33:24 pm »

They are a good product, slightly surprised that Ivan wasn't aware of their techno speak!
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Ivan Beaver

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Re: yet another way to describe amp power
« Reply #7 on: July 02, 2017, 06:46:14 pm »

They are a good product, slightly surprised that Ivan wasn't aware of their techno speak!
I generally don't read the "marketing speak".

But you can find the same sort of "what did they say/mean?" at all levels of products.

I especially love it when they come up with a new name for very common items.  Such as "Transportation assisting devices built in"  ie handles.  (I just made that up)
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Eric Dodson

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Re: yet another way to describe amp power
« Reply #8 on: July 02, 2017, 09:59:55 pm »

I generally don't read the "marketing speak".

But you can find the same sort of "what did they say/mean?" at all levels of products.

I especially love it when they come up with a new name for very common items.  Such as "Transportation assisting devices built in"  ie handles.  (I just made that up)
I like to clarify to a DJ when they brag how many watts their speaker's can handle......
"The wattage rating of a speaker doesn't tell you how loud it gets, all its telling you is what it takes to blow it up!"
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Chris Grimshaw

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Re: yet another way to describe amp power
« Reply #9 on: July 03, 2017, 03:38:30 am »

Recently found in amplifier description...

Sounds like a "pink noise, both channels driven" rating.

Chris
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Re: yet another way to describe amp power
« Reply #9 on: July 03, 2017, 03:38:30 am »


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