![]() Adding a capacitor will eliminate the light dimming issue you are having. but if you are consistently pulling more than your alternator can supply then you are right, you should upgrade your alternator.If all you have for your stereo is a normal head unit (stock or common aftermarket) and this 1,000 watt amplifier, you will probably be okay with your stock alternator. these are very short and transient, and that's where a cap really shines. caps WORK BEST WHEN your system DOES NOT routinely draw more current than your alternator can supply but is capable of drawing much more under sudden peak conditions such as heavy bass hits. they are designed to be discharged and charged rapidly also. You are right that the cap works essentially as a spare battery, but the difference is that it can get repeatedly charged/discharged for thousands of cycles as opposed to a battery, which can only survive a couple of charges/discharges. So in the end, if you are concerned about the load on your battery/alternator, it is more important to know how much current your amp(s) pull rather than how much power is going to the speakers, which doesn't take into account the efficiency of the amp, how much is being lost as heat. it has 4 3A fuses + 1 5A fuse, for a total of 17A. it puts out more power than my a/d/s amp (240W versus 200W) yet it draws less current from the battery. it is also one of the most efficiently designed amps out there, whereby virtually all the power consumed is converted to speaker power, not heat. i also have an old soundstream amp that puts out 35x4 watts + 100x1. Let's take another example to further the point. lots of energy is wasted in heat production. that's also why it has a 30A fuse and not a 15A fuse. but the fact is, the amp draws up to twice that current, because it also produces heat. if i used the calculation W=V*A, (or A=W/V), i would calculate a maximum load of 14 amps on my battery. for example, lots of amps generate a huge amount of heat, sometimes over half of the power they consume is converted to heat and not speaker current!!! for example, i have an old a/d/s pq10 amp that churns out a meager 50Wx4. but my point is this: a lot of people do have cheap equipment that is for sure overrated, and they may think they are overburdening their alternators when they really aren't. not claiming that your equipment is overrated or that you don't know what you're talking about- i agree with you on the alternator issue (see bottom of this msg). (and by the way.not to be a smart ass but my amp isnt running a 50fuse.) So im running the alternator at the max 80 amps with car running I remember there being things about the very shitty batteries put into the hyundais.might wanna check into that! So if u have a 420 watt amp running at about 14 volts ur pulling.30 amps! Just by ear i think i might hit between 150-160 DB.not bad for 1 sub! On saturday im going to get my system tested for splīecause i know someone is thinking (he only has a 700 watt amp thats why hes not dimming his lights) So all i need to do is find the formula and it will tell you how many watts you can run safely! with the 45-55 amps that are free! I know just to run the car you are pulling between 25-30 amps constantly! There is a formula to convert watts to amps! i will get that for you guys! I would understand with the people running 2-3 amps and anything over 1000 watts would dim the lights!Īlso whoever said, you add up the numbers on the fuses on the amp to find out the amps is wrong! I also have a digital fuse block that reads the car voltage and i have not ever dropped lower than 13.8 volts! Im running a solid 7-800 watts no cap, stock batt and alt and no lights dimming! This is weird that your lights are dimming! I know a very lot about stereo systems, kinda weird this is the first time posting in the car audio section! (never even posted on the old forums) The WORST thing would be to get a 5 farad cap!Īll a cap is, is an extra battery, and would anyone here hook up 2 batterys for ur one alternator to charge? ![]() With a cap ur battery is shooting power to the cap when it drains and ur alternator has to dish out even more power because its charging the battery and the cap! Yes your lights wont dim (if thats the only problem you want to fix then a cap is good)īut ur problem is with a cap u are working ur alternator twice as hard! ![]() I would hate to rain on everyones parade and piss people off.īut getting a CAP will do nothing for you!
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