Boulderguy Posted February 14, 2006 Share Posted February 14, 2006 Here's a car amp someone pointed out to me, AudioBurnMeBadly. It's ridiculous the claims people are making with these days. Check out the specs on this "4800 watt amp" - see attached pic. Note the RMS is 300x2, I doubt if it really does that. Also included - Sticker, manual & WHITE GLOVE Link to comment Share on other sites More sharing options...
jazzymt Posted February 14, 2006 Share Posted February 14, 2006 Huh? It looks like the RMS specs are accurate...according to the MFG. It's a low impedance amp. I'm not sure I understand what you're asking. http://www.audiobahn.com/Audiobahn06/pages/amps.html [CENTER][URL="http://legacygt.com/forums/showthread.php?t=18504"]Subaru Plug & Play Aux-in Mod[/URL][/CENTER] [CENTER][URL="http://www.jazzyengineering.com"]www.jazzyengineering.com[/URL][/CENTER] Link to comment Share on other sites More sharing options...
Boulderguy Posted February 14, 2006 Author Share Posted February 14, 2006 Not really asking anything, just dumbfounded over the marketing companies use these days - a 600w amp listed as almost 5000w. Link to comment Share on other sites More sharing options...
Gire Posted February 14, 2006 Share Posted February 14, 2006 It's Audiobahn. What do you expect? Link to comment Share on other sites More sharing options...
rony Posted February 14, 2006 Share Posted February 14, 2006 It's Audiobahn. What do you expect? /nod My Car vBGarage Link to comment Share on other sites More sharing options...
Brandon-K Posted February 15, 2006 Share Posted February 15, 2006 throw out any amp that tries to list its "MAX", "Peak", or "Music" power. The reason manufacturers do it is simple: kids that don't know any better want to compare their "4800 watt amp" vs their friends 400 watt amp. Link to comment Share on other sites More sharing options...
mwiener2 Posted February 15, 2006 Share Posted February 15, 2006 dual cooling fans...i'll believe 4800w peak @ 1ohm i'd also believe it's gonna melt a hole through your floor and drain your battery in 3 min...probly burn a hole in your wallet too My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Boulderguy Posted February 15, 2006 Author Share Posted February 15, 2006 Ohm's law - - Max amperage (fuse total) x voltage = max wattage That amp - - 160 x 14.4 = 2304 max watts A week or two back some guy was here asking about adding a sub to his stock system, said he wanted at least 1000 watts (the rest of the system was stock). This is where these ideas come from. Link to comment Share on other sites More sharing options...
mwiener2 Posted February 15, 2006 Share Posted February 15, 2006 2304 ~ 2400w which matchs the RMS value 4800 peak is perfectly reasonable then this is all stupid considering the stock Alternator on most cars is somewhere between 120 and 180 amps My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Boulderguy Posted February 15, 2006 Author Share Posted February 15, 2006 No, in theory 2304 watts output will blow the fuses - that's max wattage, not RMS. And most likely that amp wouldn't do half that. Good point about the alternator. Link to comment Share on other sites More sharing options...
jazzymt Posted February 15, 2006 Share Posted February 15, 2006 Not really. Your alternator is only important for continuous power. Your battery (and if you have one) capacitor take care of instantaneous peaks just fine. [CENTER][URL="http://legacygt.com/forums/showthread.php?t=18504"]Subaru Plug & Play Aux-in Mod[/URL][/CENTER] [CENTER][URL="http://www.jazzyengineering.com"]www.jazzyengineering.com[/URL][/CENTER] Link to comment Share on other sites More sharing options...
Boulderguy Posted February 15, 2006 Author Share Posted February 15, 2006 Yeah, but the car's gotta run on something... most alt's are around 60-90A, tow package gets you 110-125. HO aftermarket is 140-180A+. I'm pretty sure ours is 90A. Link to comment Share on other sites More sharing options...
jim malach Posted February 15, 2006 Share Posted February 15, 2006 ours are like 60a I have an ohio alternator oh yea thats the name of the company. Link to comment Share on other sites More sharing options...
mwiener2 Posted February 15, 2006 Share Posted February 15, 2006 i'm pretty sure we have a 100amp+ alternator. Think of all the electric resistance heaters we have to run and then all the regular stuff. Rear defogger, Side view heaters, windshield wiper heater, TWO seat heaters.... most HO aftermarket alts are int eh 200+ range edit: 110amp "generator" as per SPC-3 of the shop manual My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
jim malach Posted February 15, 2006 Share Posted February 15, 2006 no sorry Link to comment Share on other sites More sharing options...
LotusSeven Posted February 15, 2006 Share Posted February 15, 2006 ours are like 60a I have an ohio alternator oh yea thats the name of the company. As noted: 05' Legacy manual SPC-3 lists the alternator (Subi-talk "generator") at 110 Amps. The main fusable link between the alternator output and the battery is rated at 120 Amps (ref.: WI-05254), so this is the absolute max the alternator can deliver, even into a short circuit. Audio amplifier manufacturers have always played "specification games" and even use numbers derived from multiplying the peak current output by the peak voltage. Of course, the amp can't actually supply peak current at the peak voltage so the number is meaningless and misleading. It's almost as bad as vacuum cleaner or circular saw motor "specifications" where ratings of 5 or 6 "horsepower" are listed from a motor that actually uses less than an equivalent of 1.5 HP from the power line at peak load. For an audio power amplifier, the only power rating that means anything is true RMS output, both channels driven, at a rated load impedance and at a rated distortion level with specified bandwidth. Anything else is just hype. Heavy Metal Killed Beethoven Support Classical Music Link to comment Share on other sites More sharing options...
bmorrisj Posted February 15, 2006 Share Posted February 15, 2006 yup, when lightning strikes.... Link to comment Share on other sites More sharing options...
jim malach Posted February 15, 2006 Share Posted February 15, 2006 oh forgot to say that ohio generators is 160 to 180 amps Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.