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In Reply to: RE: ATI 6002 Signature Amplifier for 3.6 posted by TitaniumTroy on July 25, 2015 at 18:58:25
The specs do tell you something and i would be most concerned about how much the 6000 current limits going from 8-4 ohm , apparently they didn't invest much into the PSU for their thermal tracking output devices .. :)
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Current limits comes into play when using sine waves and SOA of the Power Transistors (and/or heat sinking) more than the instantaneous voltage a power can output into a load... However some amplifier do have a switch that select 4 ohm operation that in many cases reduces the rail voltages of the power amp at lower impedance to inexpensively "protect" the power amp. Other amp will change the current limiting cuits of the power amp with the impedance select switch.With MUSIC it is never the RMS capability that is important it is the Peak voltage swings that come into play. The power supply needs to be able to supply the peak current only for a moment or so. And yes - sometime the instantaneous current need to be supplied when the voltage is lower than peak.
I Amplifiers would be rated an Peak Power @ 50Hz, 1kHz and 5kHz with a five cycle tone riding on a -15dB RMS pink noise signal- it would tell you more what the Amp would be capable of on real music. And for fun you could also spec it for a challenging -60 degree (inductive) phase load as well.
"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius
Edits: 07/30/15
They could have adjusted their rated the output power to 225 wpc into 8 and 450 into 4 as some manufacturers do, so they would then appear to double down.
Most if not all manufacturers tend to overstate the power since relatively fewer customers understand the implications of doubling down and there are plenty of buyers who think of amplifiers like muscle cars.
Ironically so does ATI , Amercan Muscle is their slogan ... :)
It's going to take a lot of 'Muscle', American or otherwise to move them around; 88 to 138 lbs. (model dependent), shipping weight 96 to 146 lbs. No matter how it performs it's still a killer of an amp!
I suggest to read up on Morris Kessler. The ATI amplifiers are superior designs.....both from a technical aspect and from the value aspect as well.
Many design features and they build their own multi-secondary transformers in-house. You won't find anything better in any amplifier anywhere.
Dave.
Yes but that would be advertised not factual , can you name an amp that claims to double down and measures not ...
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