Mikey Bates Posted August 15, 2012 Report Share Posted August 15, 2012 kinda like being dehydrated. but for amps its depowered. you can run as fast. but someone is pulling you with a rope making you. at some point your oing to collapse (: Quote Link to comment Share on other sites More sharing options...
LZTYBRN Posted August 15, 2012 Report Share Posted August 15, 2012 Why does it pull more current? Like what physically goes on inside the amp to make that happen? I believe it's because of the regulated power supply, which attempts to always keep power output the same. Quote Link to comment Share on other sites More sharing options...
skittlesRgood Posted August 15, 2012 Report Share Posted August 15, 2012 ohm's law. its not just a good idea. its the law. Quote If I answered you in a well mannered, informative way, you asked a good question or had a good attitude. If I was an asshole, you asked a stupid question or you had a fucktard attitude... or I was in a bad mood. Team BassickHU: Pioneer AVIC Z110Front: Peerless SLS 6.5", Peerless HDS 4", Rainbow tweeter - running activeAmp: JL HD600/4 and DC 4 channel (bridged to midbass)Processor: JBL MS-8Subs: 2x 12" AA MayhemsAmp: DC 3kElectrical: DC power 270xp alt. 1/0 big 4. XSpower D3400 and six D680s. http://www.stevemeadedesigns.com/board/topic/121795-29-update-the-buick-is-getting-a-rebuild/ Top career scores: DBdrag 151.7 MECA SQ 82.25My SOTM build Yeah. im pretty sure they dont warranty retarded people. Link to comment Share on other sites More sharing options...
Skullz Posted August 15, 2012 Report Share Posted August 15, 2012 Low voltage creates a spiraling death for regulated amps, as the voltage drops it requires more power to play the same volume and as the voltage continues to drop it draws even more power and gets to the point of no return and goes nuke and makes the magic smoke. Unregulated power supplies will decrease the volume as the voltage drops so it will save your amp from going nuclear on low power and conversely if you add more power to the amp it will increase in power output. Quote 01 Ford focus ZX3 Pioneer AVH-X491BHS PPI PC 4800.2 Morel Maximo 6.5" x2 Link to comment Share on other sites More sharing options...
SnowDrifter Posted August 16, 2012 Author Report Share Posted August 16, 2012 That's an interesting point, Skullz. So is this less of an issue with unregulated power supplies? Like for example by BC3500, would that be less effected by drop than an amplifier with a regulated power supply? Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
neuspeedescort Posted August 16, 2012 Report Share Posted August 16, 2012 ever tried to spool a small turbo on a large motor. its kind of the same theory. to much effort for what is designed for. NEUMAN Quote Link to comment Share on other sites More sharing options...
STEvil Posted August 17, 2012 Report Share Posted August 17, 2012 You mean a large turbo with a small motor, but no that analogy doesnt work if you understand it really. The components are meant to work at a certain voltage (12-18 as mentioned before) and if used at that voltage they will consume a known amount of current (amperage) to produce a known amount of output power. With current regulated amplifier technology this is controlled by cycling the mosfets on and off to create a steady amount of power for the second half of the amplfier. Less voltage means the controller of the mosfets cycles the "on" time longer which means the mosfets build up more heat. Heat creates resistance which means the fet controller must cycle the fets longer again which can create further voltage drop.. which means longer duty cycles... This is known as a "thermal cascade" and as you can see it is not the voltage that is the actual death culprit but just a factor that drives the issue. High voltage can kill an amplifier by creating what is known as electron migration. Basically arc (stick) welding inside the electrical components. Computer processors are an example of something that is very suceptible to this - hence why overclocking with increased voltage has the possibility to degrade or destroy processors. Pentium 4's were great examples of this Quote MickyMcD - "Capable of making some serious trouser flapping volumes at where's-my-testicles frequencies, the Servo-Drives used to be fairly jaw dropping..." Any time you have have a power wire next to your frame put some rubber hosing (or cut up an innertube) around it. The wire is bound to wiggle (due to driving or flex) and the casing will eventually wear through. Hammerdown... 1% no links to outside websites, business related FB/YT pages allowed. Link to comment Share on other sites More sharing options...
8ight Posted August 17, 2012 Report Share Posted August 17, 2012 You mean a large turbo with a small motor, but no that analogy doesnt work if you understand it really. The components are meant to work at a certain voltage (12-18 as mentioned before) and if used at that voltage they will consume a known amount of current (amperage) to produce a known amount of output power. With current regulated amplifier technology this is controlled by cycling the mosfets on and off to create a steady amount of power for the second half of the amplfier. Less voltage means the controller of the mosfets cycles the "on" time longer which means the mosfets build up more heat. Heat creates resistance which means the fet controller must cycle the fets longer again which can create further voltage drop.. which means longer duty cycles... This is known as a "thermal cascade" and as you can see it is not the voltage that is the actual death culprit but just a factor that drives the issue. High voltage can kill an amplifier by creating what is known as electron migration. Basically arc (stick) welding inside the electrical components. Computer processors are an example of something that is very suceptible to this - hence why overclocking with increased voltage has the possibility to degrade or destroy processors. Pentium 4's were great examples of this Here is some good info. As for processors, extra voltage is OK since you have far more diverse and powerful cooling options than you do with an amp. Quote I'm gonna hate Link to comment Share on other sites More sharing options...
SCS_Audio Posted August 17, 2012 Report Share Posted August 17, 2012 Why does it pull more current? Like what physically goes on inside the amp to make that happen? I believe it's because of the regulated power supply, which attempts to always keep power output the same. How many of today's amps have regulated power supplies as opposed to unregulated? This would mean for the most part they can output the same power on a range of input voltages (say 11-15 volts). They will obviously draw more current the lower the voltage goes to make the same output power (Ohms Law). The most common amp that comes to my mind is the JL 1000.1 Slash series. These are regulated on both the input and output stages from 11-14.5 VDC and 1.5 to 4 ohm loads. Power output does vary slightly (a few hundred watts tops) but they are much more consistent than unregulated amps. Major drawbacks are efficiency and all that heat created when the voltage drops and current goes through the roof! Quote 2012 North American Street Stock Runner-up - 150.9 on 1800 clamped watts (Teammate)2013 dB Drag Street Trunk World Champion - 153.9 on 3200 clamped Watts (Teammate)2013 MECA Trunk 1 World Champion - 152.8 Headrest (Teammate)2013 MECA Park & Pound 2 World Champion - 130.6 (Teammate)Checkout our build and videos !! : ) 150+ Trunk Build Log itsgordy1 youtube channel (click for Hairtricks)Smith's Custom SeatsMartinsburg, PA (Second Skin Dealer) Link to comment Share on other sites More sharing options...
STEvil Posted August 18, 2012 Report Share Posted August 18, 2012 You mean a large turbo with a small motor, but no that analogy doesnt work if you understand it really. The components are meant to work at a certain voltage (12-18 as mentioned before) and if used at that voltage they will consume a known amount of current (amperage) to produce a known amount of output power. With current regulated amplifier technology this is controlled by cycling the mosfets on and off to create a steady amount of power for the second half of the amplfier. Less voltage means the controller of the mosfets cycles the "on" time longer which means the mosfets build up more heat. Heat creates resistance which means the fet controller must cycle the fets longer again which can create further voltage drop.. which means longer duty cycles... This is known as a "thermal cascade" and as you can see it is not the voltage that is the actual death culprit but just a factor that drives the issue. High voltage can kill an amplifier by creating what is known as electron migration. Basically arc (stick) welding inside the electrical components. Computer processors are an example of something that is very suceptible to this - hence why overclocking with increased voltage has the possibility to degrade or destroy processors. Pentium 4's were great examples of this Here is some good info. As for processors, extra voltage is OK since you have far more diverse and powerful cooling options than you do with an amp. Depends on the process used for the processor. Some are high leakage, some are low, and cooling doesnt change electromigration until you get near to the point of superconductivity of the silicon used to make the CPU.. if you can get there without hitting a "cold bug" point first. Quote MickyMcD - "Capable of making some serious trouser flapping volumes at where's-my-testicles frequencies, the Servo-Drives used to be fairly jaw dropping..." Any time you have have a power wire next to your frame put some rubber hosing (or cut up an innertube) around it. The wire is bound to wiggle (due to driving or flex) and the casing will eventually wear through. Hammerdown... 1% no links to outside websites, business related FB/YT pages allowed. Link to comment Share on other sites More sharing options...
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