Do You ACTUALLY Need a High Output Alternator?
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- เผยแพร่เมื่อ 6 ก.พ. 2025
- Ok if you ever wondered if you needed to upgrade your alternator for your car or truck then watch this!..... Or if your bass cuts out at high volume. We conduct a ground test and also a current test and show you exactly what to do so you can do it yourself.
Big 4 is extremely useful. Just adding a ground from the alternator to the fuse block under the hood. Completes the circuit.
8:00 nice video I’m currently building an 86 Silverado pickup and been talking with JS as well and looking at (2) or (3) alternator’s and main battery’s 4-5 extra batteries , according to JS fun fun stuff
I have a 3500w (RMS) system! I have a 160 amp alternator, 3 big marine lead batteries with 1 medium sized agm battery! I eliminated my factory battery altogether and am running everything out of the trunk 😂😂 only slight voltage drop not enough to dim the lights! Drops down to like 13.9 on super low sound! Comfortable listening absolutely 0 drop!!!
Could have left factory and installed battery isolator to separate 2
@@stevelovesgod it was junk so eliminated it lol
Long winded service announcement
I will try to make this as simple as I can.
The reason you want a high output alternator, even if you don’t have a high draw system in your car is because it will last longer than a cheap or stock alternator.
Basically, the higher output alternator will put out more amperage and power at the same RPM as the stock alternator, which means you will put less stress on the new alternator to provide the same amount of power that the old alternator provided.
This will reduce heat wear and tear and help your battery last longer because it will be charging more even with short trips around town, whereas with the Stock alternator, you could end up smoking your battery because it’s not getting charged enough .
Just ordered with js5 code and got $20 off, it makes me feel better about my purchase fasho
1:03 he just called me out completely 😭 I have a 2002 Honda civic as well
Thak you Josh for this helpfull video. Keep teaching us.
Yeah!! You got it brother!
Was between Mechman and JS ... went with a custom JS 320alt for a toyota FJ build. Using 3x XS power AGM. Everyone seems to go with Mech' , hope JS is as good, better, or all the same. Looking to power @ 8500-10k rms combined (not crazy, but not normal)
Good 👍 stuff 👏
I thought Big 3 was +alt to +battery, engine to chassis, -battery to chassis
So is engine to chassis / -alt to chassis the same?
Just got my 370 alt im a be running 3000x1 amp ran at 1ohm with a 4 channel 100x4 at 4ohm will i need second battery gonna be running 3000 watt too one 15
I needed this I comment I have two 15’s 4 mids 4 tweets and 2 marine speakers for the outside
Good video man.
Appreciate it!
I have a 2018 Honda accord, I will be running 2 amps, 1 down4sound jp3300, 3300 watts, and 1 down4sound jp95 1500 watts, I order an AutoTech engineering alternator 290amps. I some help with batteries under the hood and in the trunk, what should I look into?
Lto lithium cells bro best in the game
Even with hi output alternator u still need power storage or you'll get drop!!! Plus you'll strain your factory wires that's a big ass alternator for a small vehicle
Xs power d3400 for underhood batteries and xs power xp3000 for a reserve in trunk battery.excellent agm battery's
Hello I have a 2012 yaris with a 80A alternator no power windows or locks how much wrms will the alternator handle with no alteration thanks
Hey man i have all 4 gauge wire running to cap and grounds to body of chassis 130 amp alternator 1500 watt amp nothing huge but lights dim and i have a voltage drop battery is 5 years old but still charges could it be the battery and should i do big 3 02 silverado thanks
I have a 220amp. According to your math, between my amplifiers, I was a total of 190 which I multiplied times 60% and I got 114. Do you recommend I do the big three? I’m going to add a capacitor just to be safe.
My system a RF 1,500 mono block and a JL Audio 600/4, car is a Cadillac CTS with an OEM 130 amp alternator, at idle my voltage does dip at heavy bass songs at 3/4 volume which is about as high as I run unless the song isn't an older non remastered which tend to be lower volume to 11.7 volts for short bursts, but stays over 12 volts 90% of the time, this is at idle and I don't notice listening wise any dip in volume or SQ , and my headlights don't flicker, so should I upgrade my alternator or am I fine for now
Bro wire in another battery in series and you'll be good to go minimal voltage drop!!!
@@jwelch1027parallel
Appreciate the info, my current alternator in my truck is 220amp
I only have kicker cx800.1 amp, but i noticed the needle drops for battery voltage if at low rpms or idling at half volume or more, should i be concerned and or would a big 3 alone fix this?
The big 3 is highly recommended to try that first
@@BreakersStereo did the big3, still have drops in voltage, was trying not to upgrade alternator but i guess im left with no choice
Big 3 on 220 amp alt and still voltage drop on an 800 watt setup? Something’s off
@therealb_angel8774 yeah its not affecting sound any, but i can see the lil bar dropping and rising on my 23 silverado
Definitely recommend the big3/ 4.irs called the big 3 but most times it's 4 wires that need to be installed
Do I need a higher output alternator or a better battery if I’m just trying to run a new android head head unit and 3 screens? And an Xbox from time to time
My alternator is goin out just started getting light dimming top of that when I was driving I decided to turn it on full throttle n good thing my amp shut off before anything blew smh after that I took my extra battery out took some fuses out n just decided to u hook eveytime before I ruin something or burn something out
Thank you so muchness, it was very educational
I have a 86 4runner old school running 3,200 watts .... what is a good alternator. Old school cars are hard to get alternator.
Only if your system exceeds the cars electrical demands... I would still do a big 3.
Yes big 3 is critical if you can't get the voltage fast enough you'll burn shit up!!!
My alternator belts squeaks only when i cut my system up. Do that mean i need a bigger alternator?
This means you need a new belt or a pulley somewhere is bad.
@humansvd3269 i replaced belt & alternator and still doing it.
@DJ-du1mf Then the issue is likely in another pulley. You should try to take the belt off and test the pulleys or use a stethoscope to narrow down the problem.
Most newer vehicles are an absolute nightmare to replace the alternator and can actually cost over $1,250 with labor. Can just add a lithium battery to supplement the system without upgrading alt for a few hundred.
Not true have an xs power battery and still experiencing voltage drop
You need a capacitor not another battery.
@BuenasVibras909 Voltage drop is inevitable in any system. It can happen. Do you want to fix that? Get a converter.
Great video!
i have a Dual 12" 2,400 Watt SDR Series Complete Subwoofer Package with Vented Enclosure and Amplifier. My amp is 1200rms I have a 130 stock alternator, do I still need to upgrade to a better alternator or will I be okay with what I have for while ?
Skar? Yes alt and battery. Thank me later
Nice video. I needed this. My goodness.
I've been trying to figure it out for weeks now. I want to add a second battery. I'm running a 2500 W amp with 2. 12. I have done the big 4 upgrade. But I'm just not smart enough to figure out what kind of battery I need. I cannot get nobody to give me a direct answer. And it is driving me crazy. I drive a 2007 Kia Ronda. And I'm running a Pioneer head unit and Both of my twelve are rated for twenty five hundred
All you need too do is go too auto zone or Riley’s and ask for the same battery you have in your engine bay
Down4sound has a guide on the site. They have 12v lithium for the truck you can use with a regular 12v battery in the front or find out the size agm your car accepts for the front or the largest you can fit. For both batteries, you'll be spending around 600-700.
Check out xs power d3400 for underhood and xs power xp3000 for a in trunk battery.excellent 🔋
@TG-qy3us the Titan8 lithium for under hood battery before an alt. The one battery alone can power 2k-5k just. 1yr warranty though and the new ones coming out will have 4yr.
No you are not done. Unless you take steeps to seal the ground location and or take steeps to prevent rust, in a few months you will lose ground and smoke everything!
Nope your wrong! Just keep corrosion clear and good to go!!! True I've been installing stereos since 1996 when I smoked my first amp wiring incorrectly 🤣🤦
Unfortunately sounds like you just live in the rust belt
@allamerican5127 yeah, pretty much.
I have 320 amp alternator, 86 ah of lithium and a super cap with two deaf bonce asa 6000.1 with two 15” fi audio MT subs
Has it got overhead underhang though? Bet it hasn’t!
Your forgetting that the stock alternator uses about 50 to 60% to power the car. So in reality you don't have 70 amps starting you have 28 amps enough to power a 300 watt rms amp before causing issues. But since you wont play a 35hrtz tone and you will play music you can power a 500 to 600 watts of musical play on your amp. The math is this per every 100 amps you can power a 1000 watt amp. Use the knowledge as you like
And it’s a better battery preferably a agm not a shotty one like in the video
Question: When calculating the amplifier power, do I calculate ALL AMPS or just the bass amp? I'm running 14 speakers. 2 subs, 10 midrange and 2 horns. 12000 V between the 3 amps. When I do the math, I'm getting some really high numbers. I may be doing something wrong.
Add all of it up, also im pretty sure you mean 12000 watts not volts. Hope that helps.
Watts devided by current(volts) puts you at a 1,000 amp load with a 12v system. With everything in use and at full load. If you upgrade your alternator, you can add controls to controll the voltage, probly wanna turn it up to 14v that would put you around 857 amps. Which is still pretty hi. done correctly you would probably need two Mechman alternators, a second battery, isolator for the second battery is nice as well.
I have a 12000rms amp the music amps is 643 and a 1000rms amp and the pull is between 70 to 100 so add the to amperage pulls 70a plus 643a which is 710amps music pull then times it by 60% which equals 427.8 so I may need 2 alternators😬😬😬 if yours is 12000rms you'd still need around 350 to 400
Thank you for this video
Yes sir! Thanks for the comment!!
great video