Efficient / non efficient amps

[Polecat 5,000+ posts]

efficient

adj 1: being effective without wasting time or effort or expense; "an efficient production manager"; "efficient engines save gas" [ant: inefficient] 2: able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution" [syn: effective]

inefficient

adj 1: not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods" [ant: efficient] 2: lacking the ability or skill to perform effectively; inadequate; "an ineffective administration"; "inefficient workers" [syn: ineffective]

 

[JimJ 5,000+ posts]

I pity the fool...

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[3.5Max6spd 10+ year member]

Alto Mobile amps I believe are the most efficient amps on the market- they claim they 'exceed 90%' in that dept...full range class d's

the work efficient may be an adjective, but 'Efficiency' of an an amplifier is based on technical data..

http://www.altomobile.com/html/amplifiers.html

 

[squeak9798 5,000+ posts]

Alto Mobile amps I believe are the most efficient amps on the market- they claim they 'exceed 90%' in that dept...full range class d's
the work efficient may be an adjective, but 'Efficiency' of an an amplifier is based on technical data..

http://www.altomobile.com/html/amplifiers.html

I don't know though.......CA&E mag just did a test review on one of them and it had significant top end rolloff begining at 7khz........

Eclipse however also has a full range Class D amplifier.

 

[HiAmplidude 10+ year member]

Xtant also makes some super slick 100W full-range "Class D" mono-block amps (small enough, probably, to fit some in the doors) *g*

 

[SteelWheel 10+ year member]

Thanks. Any ideas on AB? Are is there no significant difference in efficiency among the brands in this class?

 

[HiAmplidude 10+ year member]

Thanks. Any ideas on AB? Is there no significant difference in efficiency among the brands in this class?

There certainly can be. But, you don't want to base your whole decision, necessarily, just on how efficient the amp is.

 

[Tirefryr 10+ year member]

I don't know though.......CA&E mag just did a test review on one of them and it had significant top end rolloff begining at 7khz........
Eclipse however also has a full range Class D amplifier.

I thought it was 17Khz?? Maybe that was the -10dB. I was actually thinking of purchasing the Altos until this review. Even the listening session can't sway my vote with that SAD measurement. The Class G Genesis looked appealing thoug, aside from the ridiculous price tag.

And while I'm at it. . . . .

Guess where the breeding ground for stupidity lies. We're all close right now. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Phiber Optik 10+ year member]

Massive Audio's A/B's are great, over 70% at full power from my RS-100

If you want 1 amp to power your component and subs efficiently then look into Avionixx 800.4 class T

 

[squeak9798 5,000+ posts]

I thought it was 17Khz?? Maybe that was the -10dB.

It was -1db at 7khz, -3db ~11khz, and only got worse from there......

 

[Tirefryr 10+ year member]

Avionixx class T

"Oops, my chip fell out. Can I have it back please. I need a WORKING amplifier."

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[Tirefryr 10+ year member]

It was -1db at 7khz, -3db ~11khz, and only got worse from there......

Yeah, I just read that. You made me go get the mag. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Raven 10+ year member]

//content.invisioncic.com/y282845/emoticons/bsflag.gif.21f42eccd34b7d1eb1608fb1b59b69c3.gif
You might see A/B get into the 70s at full output, but efficiency is usually half that at 1/3 output ...

Class D and Class T/X amps are typically the most efficient, with efficiency at full output between 60-90% with a small drop in efficiency as power decreases ...

Me = misreader of stuff

http://www.caraudiomag.com/specialfeatures/0111cae_anatomy/

 

[cstabler 10+ year member]

Your mother is an IDIOT....Look it up, ask an English teacher, the word efficient is an opinion! NOT A FACT.......

The ratio of the useful energy delivered by a dynamic system (such as machine, engine, or motor) to the energy supplied to it over the same period or cycle of operation. The ratio is usually determined under specific test conditions.http://www.natresnet.org/resources/lender/lhandbook/glossary.htm

The measure of loudspeaker's ability to convert power to work. Formula Efficiency = (power out/power in) x 100. Efficiency is always expressed as a percentage.

http://www.precisionautosound.net/glossary.html

The ratio of total output power to input power expressed as a percentage. Normally specified at full load and nominal input voltage.

http://www.snaptec.com.au/technicalnotes/glossary.htm

The percentage of power that gets converted to useful work. Example: An electric pump that is 60% efficient converts 60% of the input energy into work - pumping water. The remaining 40% becomes waste heat.

http://www.thesustainablevillage.com/essays/watpumpglossary.html

The ratio of the output to the input of energy or power, expressed as a percentage.

http://www.canren.gc.ca/prod_serv/index.asp

The efficiency of a transformer is the ratio of its power output to its total power input.http://www.jeffersonelectric.com/techglos.html

Generally speaking, efficiency is the ratio of total energy output to total energy input, expressed as a percentage. Loudspeaker efficiency is usually very low, in the 1% to 3% range, meaning 97% to 99% of the energy is dissipated as heat! A typical car audio amplifier has an efficiency of 50%. Rockford Fosgate amplifiers efficiency ranges from 50% to about 70%, which means less current drawn from your electrical system for a given amount of power than our competitors.

http://www.customautosounds.com/faq.html

Hmm... //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Nikuk 5,000+ posts]

jmac strikes again