CCA vs. OFC 1/0 Power Wire - Is Cheaper just as good? Definitive Results
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- čas přidán 12. 09. 2024
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You get what you pay for. I got this small run of Tinned OFC from www.ceautoelect... . I actually have 2/0 at the shop but that wouldn't be a very good comparison. So i got this strictly for the video. I may use it in something now that i have it though!
#CCA #OFC #Amplifier
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Thanks mr Steve Meade, I was totally thinking if I should cut cost...I’m thinking not... good shit brother 👍
meade916 are those b2 2500’s half ohm stable?
Should have ohm tested 3ft of each wire that would tell which one is better
And when I said ohm tested I mean how many ohms per 3ft in each wire
OMG! Tinned OFC gain 300w in my truck that means alot!!
As an installer I want to thank you for doing the test, this should help alot of the ebay kids understand its cheaper for a reason, let alone all the other downsides to it.
I keep coming back for the quality content, but I'm really here to see the doggo! :D
ive been watching SMD since the early days and i gotta say i love his progress, much respect to his work ethics.
Love how your dog was like, hey, dad, I'm bored... Pay attention to me
Always respect for you doing videos like this to teach and inform! Thanks Steve for being such an important figure in the audio community for so many years!
Its funny. I have just started putting everything together for a new system. I left everything in my last car. I had 2ga OFC Rockford Flat wire. I haven't bought any wire in over 10 years. I see all of this $25-$40 CCA 1/0 wire and I was like wow wire is cheaper now a days. Then I realized it was aluminum. So I thought that probably works about the same. Then I did some research and your video proved it. OFC is worth the added price. The timing could not have been better. Thanks for taking the time to do it.
Do a comparison with welding wire alot of people in the bass industry have been using welding wire because its half the price... maybe power comparison there
Lol really?
Same copper different jacket
You need to do a OFC vs. Welding cable comparison! Purdy pleez!
@@sethgt1234 thanks for the info Seth much appreciated!!!
@@Bryan_327 why?
This is one of the best executed tests from an engineering standpoint I have seen in almost four decades of being a professional engineer. Hats off to you Steve!!! Well done!!!!
The reason *why* Copper Clad Aluminum for DC applications is so vastly inferior is that DC current flows through the *entire* conductor and the ampacity (which is the inverse of resistance which by itself is determined by the wire diameter and the wire material) for CCA is about 20% less than OFC. The copper clad aluminum for AC applications may not have this severe a disadvantage since AC current (due to skin effect) primarily flows on the surface.
The speaker wires (being much shorter AND since they are carrying AC audio signals) may not be hurt too much by using CCA but the power supply current (pure DC at several hundred amps) of course will which is what we see here with Steve's experiments.
Bottom line everyone - if you want a top of the line system with minimal ohmic losses on the cable, please spend the extra money and get the OFC. If you are spending thousands of dollars on a high end audio system, you can spend a few more hundred dollars and get the top-of-the-line cables. Don't skimp!
Thank you Steve Meade!!! We wish you were around in the late 1980's with all of this fabulous gear available back then!
Ever since I watched this video years ago, it's been nothing but OFC for me, bro. I appreciate these videos u put out. It helps out alot.
here's a good test Mr. Meade, Try 4 gauge OFC against 0 gauge CCA and see what the difference is. Thanks for all the great info
Doggo be like "wha u doin hooman, lemme halp"
The number one reason to use OFC is, at some point the CCA wire will go through enough heat up/cool down cycles that it becomes brittle. Eventually it will crumble. You can't stop it from happening & there are things that will speed it up, like sharp bends or stepping on it repeatedly. As it degrades it's resistance increases & it will get hotter & hotter. I know this because I ran CCA once, not knowing that's what it was. I had never seen or heard of CCA before & neither had anyone I asked who didn't work in the car audio biz. I started having intermittent problems with the amps & after a lot of digging it was the power wire. About mid run the wire had broken up so bad the insulation was cooked off & the immediate area around that spot was black. That's how much heat was generated by that crappy, brittle, pathetic excuse for wire that it could have very easily started a fire as this was under carpet. I can only guess that my drive times were short enough that it didn't stay hot enough, long enough. CCA is fine for jumper cables but for safety's sake I urge everyone to please use copper wire in your vehicle for everything. OFC is not cheap, I understand, but it's a lot cheaper than your ride or your life & you can reuse it for the next several installs. Great video. Thanks for taking the time & putting forth the effort. This is an important topic because it's about more than money, it's about safety. So thanks for making the video. It gave real world numbers showing the difference between OFC & CCA & gave myself & others somewhere to share our experiences with CCA. Hopefully we change some minds. Stay away from CCA!! It's crap!
Same shit happened in my car lol.
I haven't even made it a quarter of the way in the video oh, and I have to stop and say that dog is absolutely freaking adorable ...
Now to finish watching the rest of the video and find out what I came here for. :)
haha thanks :) that is baby. czcams.com/video/PBUttEEsVQQ/video.html
I absolutely love your dog! I have a Siberian Husky and watching her reminds me so much of my baby. ❤
I use 1/0 flex-a-prene welding cable. It’s like $2.33 a foot. 🤷🏽♂️
Is welding cable better then ofc?
Not only is it 300 watts difference, but th efficiency as well. That is something that benefits your entire system.
Aluminum
Copper
Gold
Silver....silver tinned true high quality ofc properly shielded is dope wire.
Thanks for putting some numbers on this ongoing debate Steve. Up to now I wasn’t shure if ofc actually made a difference. The arguments I had heard against cca were about corrosion, which I doubted. I have used ofc because that’s what the quality brands have. Great job.
Dude, you are the reigning King of Car Audio
Steve What we really need to see is the Audio Cable VS welding cable... Everyone is screaming Audio Cable is better but welding Cable is ran off 120/240V with tons of amperage. Doesn't add up
I always thought the same thing. Only thing i can think of is the car audio wire is more ambidextrous.
Welding cable is typically 100% copper too (or at least it used to be) so that seems fine; however welding cable isn't "OFC" to begin with and isn't tinned either so it also degrades more with time as the cable will oxidise more. OFC is "oxygen free" to begin with and tinned to prevent further oxidation while bare copper has neither measure.
With the numbers above it's a 5-15% difference between the CCA and the pure copper. But OFC tinned v. plain old copper will probably result in much less of a difference maybe a couple percent. Take the same two wires after being exposed to real life after a couple years and it will probably get to be a larger difference but I doubt you'd get anywhere near 15% we're seeing here--that's quite a big difference because CCA is mostly aluminium. But yes It would certainly be interesting to see them tested side by side to put to bed any thoughts that expensive "car audio wire" is hugely better than welding cable, speaking of both pure copper examples.
Remember that the difference between 120/240 VOLTS as compared to Amps /watts equations
Back 30 years ago, I used welding cable which was less than half the cost of Streetwires AND was pure copper. I just got in 10 feet of the 2/0 AWG from CE and it is *awesome* cable! Also, Team Shok has an insane product - 8/0 AWG!!! (If you do not understand "8/0 AWG", go visit their website). Steve used this cable when he installed his test bench power supply:
czcams.com/video/S6TvHLU-C5w/video.html
.
You are correct about the drawbacks with welding cable especially regarding degradation. This can be minimized by using quality terminators with high compression crimp tool PLUS heat shrink. A good installer will do this anyway even with OFC! :)
Not only is there power loss with CCA, OFC won't oxdize as quickly as CCA will. With oxidation comes more resistance and with more resistance comes voltage drop. SMD keeping it 💯
i would like to see a run with one input of ofc, then a dual input of ofc, then a triple input .... that would be informative...
Great video SMD! I think this really helps out the entry level enthusiast who’s on a tight budget. Not many people can spend $100+ just to connect a amp. Appreciate the video!
When I put together my first system (almost 20 years ago) I went to home depot and got 12gauge wire. Figured if it was good enough for 220 volt what the hell...🤷♂️
I just ordered my 0 gauge from them also hahahah
@@hectorheco5194 Wendynation copper cables american made 100% copper cable
Hah as a kid I actually used an extension cord. Ran the hot from the battery, stopped by the fuse block and picked up an acc and off to the trunk it went. Worked fine for the tiny little amp I had. Good memories :)
As the CCA wire heats up, it expands more than the OFC, and you lose even more power, CCA will become brittle and corrode much sooner than OFC because of this thermal difference.
Shouldn't be heating up at all, if so you're running way to small of wire.
@@Str8GasGenetics If electrons are moving, heat is being created. Aluminum has a higher resistance to current than copper, therefore causing more heat. You are correct to a point, if you dont want your CCA to get hot, then you will need a wire gauge more than double that of OFC, so what Steve did in this test was compare the same size wire, if he continued to run it, the CCA will be much hotter after a couple minutes than the OFC would be, he would also start losing even more power, he can get around this by running a much bigger CCA wire, spending as much or more than just buying the OFC to begin with. CCA is not worth it.
@@Str8GasGenetics CCA will get warm. You don't have to run to small of a wire for that to happen. Just run CCA and that's it.
@@meade916 nigga you haven't ran CCA in 30 years you don't remember
I run 0 gauge cca with only .03 volt drop and it never heats up at all.
I o ly run 1200 watts rms.
If I was over 2000 I would go off for sure.
about time sumone sheds sum.light on that subject. 😁😁👍👍👍👍👍
GREAT to see a Zapco AMP banner. That is all I used in the late 80's. I think there were Z220s.
I used cca wire once and it corroded so bad the plastic around the ground terminal melted from all the resistance and was stuck in the amp. Just spend the extra money and buy ofc!
Puppy has grown a lot since the rescue 👍👍👍👍
I'll never use CCA ever again. It may not be a huge difference, but significant enough to spend the extra couple bucks for the better wire. I wonder if 100% pure copper wire vs tinned ofc would show any difference?
I know this is old, but I doubt there would be much of a difference between ofc and tinned ofc. The tinned is mostly made for water environments to help with corrosion resistance.
I’ve learned a lot from you for the past years. Everything I do now, I always use OFC no matter what
Well anyone that would use cca for power wire would also use cca speaker wire too.. Why not go the whole nine yards and show what "budget" wire gets you.. Even cheaper RCA's will effect it without compensating with gain. Just to show the total difference in performance. Just a suggestion. Always enjoy your vids man keep it up..
Thanks for this video!! 300 watts is a big deal no matter if you're doing 1000 watts or 20,000 watts. It's the same as drag racing. We've spent $3000 just to gain 3hp before. Once you get into high power every little bit helps!
The only thing you have to ask yourself is, is it worth it to you. If you're on a budget with low end subs and amp I wouldn't expect someone to pay top dollar for just the wire. But for people that have the mid to high end top quality wire (no matter if its RCA or power wire) it's a must.
Who else was expecting his dog to start biting his tape measure or the cords? LOL
If there's gonna be any more comparison videos on this subject, would you be willing to show how much heavier gauge is required to compensate for CCA's deficiencies and the minimal overall cost savings (if any) as a result?
I know what you mean - you want to show all the cheapies and clowns how dumb it will look to have double runs of CCA to have the same performance of one run of OFC. By that point you may as well get the proper tinned OFC rather than almost spend the same on a heavier CCA. Plus no idea how or why someone would want to fit two runs of 1/0 AWG CCA instead of 1/0AWG OFC. THAT is the only way to overcome and surpass the difference on conductivity of CCA vs OFC. CCA only has approximately 62% the conductivity of oxygen free copper. Let's call it 50% to make it easier. What? People are going to run 1/0 CCA plus an additional run of 1 or 2 gauge CCA to make up the difference? That is straight clownish and cheap as is two runs of 1/0 CCA vs one run of the proper 1/0 OFC. Don't be cheap and do it right. A vast majority of ppl with high current draw, high power systems will not be impressed at all with ANY CCA present. Getting a few "oh wow(s)" from a few passerby's that don't know the difference is totally not worth the time nor trouble. They will end up doing things twice in the end. (Unless they are under 2000Watts.) Why are people even trying to argue about advantages of CCA? $$? Really? You all are not the power company in India or even the USA running 60-120KV AC over miles and trying to save money. Those high tension wires have steel cores to prevent sagging and breakage under the tension, intense sun, and heat from power transmission. Aluminum cracks if not drawn properly in the dies. Mr. Meade was kind enough to give a 100% SOLID and clear test showing why it is not wise to use CCA and you all are still in denial. Silly. Wake up.
CCA wires also seems to corrode and have the strands break off very easily. You also can't solder it and have it actually hold.
Everytime I watch one of your vids I learn something. Don't stop. Thanks for all the knowledge over the years.
Copper's melting point is 1,984°F and Aluminum is 1,221°F ... I've never seen a burnt OFC ground but I have seen lots of burnt CCA grounds. Also the OFC is much more forgiving when soldering in my opinion. GOOD SHIT. 👍👍👍👍👍
Thanks for the the video. I wasn't sure if there would be a big enough difference to matter. Now, I am no professional, I was doing a simple guess really. I thought maybe a small percentage that amounted to at most 100 watts. I was wrong about that for sure. 300 watts is a big deal when you are just talking about a wire. This video showed me the truth.
Gotta get my stretches in while dad is working haha love 🐶
Steve, these numbers may be even more alarming on smaller gauge wires, like connections to speakers. No telling how much loss on a 16ga speaker wire @20ft. Cca may lose SQ as well.
Awe the dog wanted attention lol
Good definitive proof. It's nice that you "let" the dog "help" you.
That was so cool starting at 2:06. That dogs a badass. Trying to help.
Thank God a real comparison. Watch all kinds of ppl burn cca wire up bc they try to go cheap. Thanx for being the boss Steve been watching you since you have been shaking hobos and popping eyes out!!!!
No in his Escalade he pops a ladys eye out of her head with 30,000 watts
Wow! Guess I will stop being cheap and hard headed and go back to ofc
1trucavalier me too!!
I would've liked to see the difference in Resistance between the CCA and OFC. A quick ohms test would tell lots, but wouldn't have got the message across as well or been as fun.
Cheers bruh.
It's general practice in power industry to use aluminum cable only for High Voltage transmission due to its higher resistance.
It is used in *spite* of its higher resistance. You cannot inexpensively use copper for overhead transmission lines because it is too heavy and too weak structurally. You would need poles or towers every 100 feet. What is actually used is a wire type called ACSR (Aluminum Clad Steel Reinforced). The center of the cable is galvanized steel (provides structural strength) and the outer layers of aluminum carry the AC electrical current.
That was a 15% improvement with the OFC. Definitely worth it! Great video!
Standards for tin plating of conductors and metals hace existed for many a decade. Two standards more precisely : MIL T 10727 and ASTM-B-545. At minimum, for both, the tin shall be 99.0000% pure. Most platings I see are 99.970%. The range of plating thickness is 2.5 microns (ASTM Class A) minimum to 30 microns (ASTM Class E). For reference, a micron (um) is 0.0010 mm, or 0.0000393701 inch. MIL T 10727 Class A references ASTM-B-545 (2-30um). The other MIL spec classes are for specific purposes such as severe duty environment (thicker plating) or will the surface need to be soldered (thinner plating). Let us assume there is 5um of tin plating on each OFC conductor of the 2/0 cable. I will say as an example that there are 5292 strands of 0.12mm (36.5AWG). So, 5um of plating is 0.0010mm x 5 = 0.0050mm. Plating is obviously around the circumference of the conductor, so when looking at the cross section it appears in two places. Therefore, 0.0050mm x 2 = 0.0100mm added to 0.1200mm = 0.013mm. This is all heresay since I do not know if the 36.5AWG is before or after plating. If it is before then the strands would be upsized to 36AWG with the plating. If it is after plating then the raw copper strand started as 37AWG. Ok, let's say the 36.5AWG is AFTER plating, so it is actually 37AWG of copper stranding or 0.1100mm. 0.01mm of 0.12mm is 8.33% of the diameter ((0.01÷0.12)×100%). Let's now calculate the difference in area before and after plating. A=2 x pi x r. Area of 37AWG (0.11mm) strand = 2 x 3.14 x 0.055mm = 0.0095033mm2. Now the area after plating, or 36.5AWG (0.12mm) = 2 x 3.14 x 0.06mm = 0.0113097mm2. Now the percent difference of area = 100% x ((0.0113097 - 0.0095033)/0.0113097) = 15.97% increase in conductor area after 5micron (5um) tin plating. So, OK, your concern about tin plating taking away from the overall area of the 2/0AWG cable is founded. BUT this is assuming the plating actually IS 5um versus 2.5um or 3um. A minimum plating of 2.5um will have significantly less change in area of course. My 5um was worst case scenario. Another unknown is if the 2/0AWG calculated area is overall or the copper only. Hope this doesn't confuse. Either way 2/0AWG is a good standard flexible cable. You should see what the railroad uses to connect reactors to the rails on 750VDC electrified third rail systems. I forgot what it is called but it is as big as my forearm at the elbow and the runs are double to and from the reactor (I am a lightweight but dig ditches under four sets of rails with a quickness!). I only spend this much time on responses for viewers of SMD and Williston Audio. Both dudes have been in the audio world since birth and SMD is supremely wise and technical. Viewers of both deserve good explanations and reasoning.
I was waiting for the dog to hold the tape for ya. I bet he would lol
Steve, good example of what cheap wiring can cost you. What about the inverse though? At what power level does the cost of OFC negate any gains over CCA? Could you run a few tests say at 1500, 1000, 500 and even say a basic 250 watt power levels. This would show that it is still in the best interest to use OFC even at lower power levels if one can throw a little more money at the install.
A comparison of 4 gauge ofc and 2 gauge cca would also be interesting.
The cca would probably still be cheaper and be close to, if not equal, in current delivery.
Assuming you could use either gauge on the same amp.
Lol WHAT! 300 WATTS! Hey bro that enough to me especially since I'm getting ready to re wire my charging system and amp power supply. I just got my first set of Fi audio subs entry level but there Fi hooked them up to my home theater system just to hear them and literally had my floor going up and down with the sub. Thanks Steve you the man.
The dog does all the work lol
I like how you competed against your own wire and still showed the results. Sweet man
no i didn't. I don't have wire. That was just heat shrink to make the connection look decent for the video.
I buy o gauge welding cable. No aluminum very sturdy and cheaper than buying car audio wire.
baby has grown so much glad your a good guy and saved that dog keep up the good work buddy one day i will have u build one of my systems for me
Baby's all like "hey man, what you doin down here? What's goin on??" Hahaha
i think i watch for baby only some times LOL
Thank you for doing this, I've been honestly wondering if there was actual loss of power with cca and you've proved it. Keep doing it "champ" ;)
Came for the content.. stayed for the doggo
been in to car audio for awhile, but just now getting into the higher end stuff. just bought my 1st set of OFC 0m gauge and at 7 bucks a foot im glad to see from this video it actually makes a diffrence, i know i dont want to lose any watts lol thanks for the video
😂 that dog 😂
On a 2500 watt amp that is roughly a 10% loss. Just like Steve said that was also a very short run!
Steve I would love to see this test on a larger amp with a more realistic length of power wire.
Your dog is amazing
Also cool video
I tried telling people that copper is better than aluminum when it comes to wire. That is all I run. My very first big amp was a boltar amp and it took 4 gauge. I went to Home Depot and purchased the most expensive wire because I did not know anything about installing an amp. It was that big thick heavy and stiff wire you would use for a power line. I ran that in my car for years. You needed bolt cutters to cut it lol. For some reason this video reminded me of that wire.
I was just looking at the wire at home depot 2days ago and i was wondering if it would work. Thanks bro on the confirmation👍!! I will purchase some and 2/0 gauge is only about 2.30$ ft and1/0 about 1.80$ ft
I did this back in 2001. I wouldn’t do it now because you can go on amazon and get the real good welding wire for a decent price and it will be more flexible. The wire I had was stiff and hard and very heavy. I had to modify my terminals on my amp to hold that wire. It was crazy but it worked. I even had the extra batteries in my trunk.
Your dog is absolutely gorgeous!!!
What I'd be interested in is a price comparison, for instance, if a 15ft length of 4 guage OFC and a 15ft length of 1/0 CCA were to cost the same, how will the performance differ? Most people that would be using CCA are on a budget so a price to performance ratio could be more relevant than comparing the conductor material to performance. That all being said, yea, CCA is pretty lousy.
Can you do a test on ofc compared to welding cable PLS
People dispute welding cable due to the overall diameter of the 2
Diesel locomotive cable if you can get it locally. Good stuff.
Good shit, but Ima still keep using welding cable.
Welding cable is nearly as good as OFC as long as the welding cable is 100% copper and is less expensive. Because far fewer strands are used, it will also be stiffer than high-strand-count OFC (which is specifically designed for autosound and automotive applications).
And there you have it. This has been my arguement between my installer partners and I ! They have been saying theres NO DIFFERENCE for years.. but numbers don't lie. Im sharing this vid brother, thx
Im guilty of using cca because in my electrician coarsre they taught me that aluminun was ok to use but i guess cars moves lots of amps and housing moves higher volts using only 30 40 amps max.
Per the National Electrical Code, aluminum wire is perfectly acceptable provided certain design criteria not the least of which includes circuit breakers and outlets that are approved to use aluminum. Some local building codes depending on where you live will *still* not allow alumimum wire for residential use (commercial use for aluminum is pretty much allowed throughout North America). Aluminum because of its lower ampacity requires lower circuit breaker ratings than copper wire of the same size.
What Steve demonstrated is NOT avoiding CCA because of increased fire risk but rather ensuring excellent power delivery using the correct sized OFC cable.
Checkout Kicker's demo and comparison test of CCA vs. OFC:
czcams.com/video/MK48fn5FRUg/video.html
@@volleyballjerry I know what your saying and your absolutly right but i was shocked that building a couple high wattage stereo systems and used cca and never gave my 12 to 14 volt wiring much thought as i would if i was wiring a 240/120 housing structure and ive seen older houses that still had alot of aluminum wiring but not in the fuse box or any termination points. Steve just had me in deep thought after his video and when i posted i see now i wast to clear for others to understand what i meant and i thank you Jerry for taking the time to point out fix.
Thanks brotha for taking the time to do this video!! 👌👍
Your dog is awesome.
2:08 loving your dog and how it’s in the mix🙌🏽
Your dog wants to help lol
I know this video is old but this was exactly what I was looking for. Thank you Steve for your awesome information. 🤙🏼
Should try 4ga ofc vs 1/O cca
I was told the 4ga would be better
That's results you can read. Great video. I'd like to see 1/0 ofc vs tinned ofc.
As an electrotechnican, i hate Aluminium cables. The only upside is price. Everything else is downside. In car, CCA cables turn to powder in a while.
But, copper is expensive and we don't have enough of it for everything.
100 true I had a cca wire turn to a coal dusty substance
This is a great vid. I will forever share this vid to anyone getting into car audio!
What’s your opinion on welding cable?
But I thought you already made an ofc vs cca video back in the day... But props to you for teaching class today and spending your time showing (and shutting down) the opposition.
I've always, only, used ofc.
nope.
The dog is main expert. :)
got rid of cca years ago went with Skyhigh and never looked back it's the most flexible and slightly oversized you get more for your money.😎
Bottom line is, is it worth the extra money to get OFC wire? FUCK YES
Now what might be a cool add on to this, is to test multi wire input lug/adapters to see if there are power gains. You could test dual, triple, etc, and see if there are any gains to be had on the dyno. That would be interesting.
I appreciate the results but I’m just curious if the temperature of your dyno can change the results? On the CCA the dyno was at 62 degrees and the OFC was around 90 degrees
Well he's smart he did cca first while the dyno was still cool meaning there was less strain from heat
As temperature increases conductivity actually decreases. So if temps were the same theoretically the copper would do even better when compared to o aluminum! Hope this helps :)
That is so crazy you made that video my buddy was just asking me about why each Orion amp comes with a different rating. I had to explain to them that resistance and wire every little thing can change it so much. He’s not a stereo guru like us. Seeing baby she so friendly with you is an amazing sight , it almost brings a tear to My eye . I have almost the same dog that I saved and he does the same stuff looks the same Sheds the same. Lol.. great vid as always
Love how the dog asks for attention.
That right there is just one of the reasons i watch your channel.
Why not used copper welding cables???
always use ofc imo. been in the industry for a good long time myself. this was a good one. thanks for showing what many better shops tell people is true.
CCA fine with me.for the price I don't need every watt fir daily driving. Imjs
Glad I saw this video, was in the market for a new amp kit. Now I know, appreciate it bro.
Same here. Still cant decide if I should go with 4 guage or 0 guage. Prob dont need the 0 gu. But I dont like to do shit half ass. Then ya just wind up wishing you had just saved a little more cash to do it right.
Herd some judas priest playing. Love their music. And the copper made a substantial difference. Greatly video.
Another type of metal :)
AWESOME STUFF MAN CANT WAIT TILL YOU HAVE TIME FOR THE NEW BUILDS ITS GOING TO BE SO SWEET
Friends don't let friends run CCA.
😉👍
I use cca , just alot larger than the ofc I would be able to get away with. 0 gauge cca kit from knukonceptz on my 1200 watt rms amp and has 0.03 voltage drop in a 20 foot run. I doubt that the 4 gauge ofc kit would be any better and at double the price I am good with big ass cca.
I saw test on YT that should CCA heating up to the point of melting. I never mess with it. Do it right the first time.