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X2.^^^^. If you don't like it then don't buy it.. Looks like it passed to me

You also know, that the .5 load test, is reactive right? .Not nominal....Would you wire to like .2 ? I thought it was nominal not reactive. Like nominal would mean that it is always .5 and a reactive load would change. Could be wrong though. No, the Dyno tests using purely resistive loads. It is NOT subject to any type of rise. If a test is done at 1 ohm, then that is what the amp is seeing for the entire duration of that test. Now that being said, the dynamic test is much easier on the amp and electrical than the certified or uncertified tests. I would be very surprised if that amp stayed on for a .5ohm certified test. And for the fact that he simply states they will not warranty the amp at .5 ohm. I don't get why a company would test at .5 ohm load and then not warranty if they are going to brag about results? Still great numbers and loved my 4500s. We did the test because customers requested it, and just because we cannot warranty them at that load does not mean a lot of our competitors don't run it at that load without issues =) They are on an uncharged bank of (16v) batteries (4 Batteries), so of course the dynamic runs are short and not as much of a drain on the batteries as the cert and uncert tests, but nonetheless it gets the point across that this is a very strong amplifier. The Certified and Uncertified Tests are the most accurate tests to go by if you are looking for real power at 1 ohm.

Speaking as a Dyno owner and having done the tests myself, the 2 numbers that truly matter to me are the Certified and Uncertified. I dont know enough about the Dynamic test to really understand how that would translate over to a daily application. If an amp passes Certified mode, then in my book it is a good amp. Now when bench testing an amp, you are testing it under the best possible conditions. Once the amp is in a vehicle, it is at the mercy of that specific vehicles electrical. Things I would like to know about a bench being used to test amps. 1) What batteries and how many are being used. 2) What charger or power supply is being used to keep the batteries charged. 3) Is said charger or power supply being used during the test From the tests I see here, I see a 15.5v, that tells me that 16v batteries are probably being used. There is a lack of information here other than just showing dyno numbers.

.5 run would protect. .....

I'm not a skar far but I wouldn't hesitate to buy a skar amp, his amps are pricey but they are legit.

inb4 whatever happens boring or banning.

I don't get why everyone wants give Skar shit about their dyno results.... anyway I would like to see the Sk2500 on the dyno @ 12volts

Today at Skar Audio we put the Skar Audio SK-4500.1D on our newly built test bench and got it all set up with the SMD AD-1 Amplifier Dyno for power testing results... Needless to say many customers asked us to Dyno this amplifier once we started putting videos up of our smaller amps, and now that we are set up to do so, the time has finally come to post those results. Steve and Tony did a great job with designing and building a product like the AD-1 so that way we can easily test and get across the real power output capabilities of these amplifiers in the most accurate way possible. Enjoy! SMD AD-1 Amplifier Dyno Testing Results Model: Skar Audio SK-4500.1D Monoblock Amplifier Certified Run at 1 Ohm : 4,943 Watts at 13.85 V Un-Certified Run at 1 Ohm : 4,996 Watts at 13.85V Dynamic Power Run at 1 Ohm : 6,208 Watts at 14.88 V Dynamic Power Run at 0.5 Ohm : 8,641 Watts at 15.42 V Thank you for taking the time to read this thread on our SK-4500.1D, for more information about this product or to find an authorized dealer from which to buy, please visit our website at www.SkarAudio.com -Kevin

Guys, I veering off topic a bit here, but this might add some perspective. I was going to wait for Tony D's education video to come up about impedance, but it might help to throw this out there for consideration. There's soo much more to amplifier output then just what you're nominally wired at. Here's an impedance sweep from a Hertz ES200 8" sub that I have: Notice the raw driver has an impedance peak of about 30 ohms at ~31Hz. In a ported box, notice there are two peaks of ~20 ohms at 22Hz and 53Hz. So your resulting impedance really depends on the frequency of material you're playing. Burping at one of those peaks would obviously cause no issues to the amp whatsoever. Notice that the lowest impedance that the driver gets to is approximately its nominal impedance (4 ohms) and it only happens in a few frequency bands. "Re" is it's DC resistance (2.9ohms) if anybody is wondering. So you can see why testing an amplifier at a resistive load (constant 4ohms) would be a MUCH harder test, which is what the AD-1 does. Hope that helps.

Enough with the bashing, everyones been given a warning in the past. I mean lets grow up. The sk4500 bench was requested by me and a number of other potential customers. I even asked for a .5ohm run. Granted I'm even saying I think there needs to be a 3 step bank for the dyno runs, 12v 14v and 16v. I'm impressed with the numbers even with the spiked voltage. The only amp that worries me is the sk3500.

You also know, that the .5 load test, is reactive right? .Not nominal....Would you wire to like .2 ? I thought it was nominal not reactive. Like nominal would mean that it is always .5 and a reactive load would change. Could be wrong though. No, the Dyno tests using purely resistive loads. It is NOT subject to any type of rise. If a test is done at 1 ohm, then that is what the amp is seeing for the entire duration of that test. Now that being said, the dynamic test is much easier on the amp and electrical than the certified or uncertified tests. I would be very surprised if that amp stayed on for a .5ohm certified test. And for the fact that he simply states they will not warranty the amp at .5 ohm. I don't get why a company would test at .5 ohm load and then not warranty if they are going to brag about results? Still great numbers and loved my 4500s. We did the test because customers requested it, and just because we cannot warranty them at that load does not mean a lot of our competitors don't run it at that load without issues =) They are on an uncharged bank of (16v) batteries (4 Batteries), so of course the dynamic runs are short and not as much of a drain on the batteries as the cert and uncert tests, but nonetheless it gets the point across that this is a very strong amplifier. The Certified and Uncertified Tests are the most accurate tests to go by if you are looking for real power at 1 ohm. I get that part, but to advertise it as such...I mean the intro to this thread says Dyno results 8600 watts. I'd just hate to see someone buy it and ruin it and it not be warrantied for something you advertised saying hey looky here. You know I love the amps. I had two, until I sold the car. Would still have them if I had something to put them in. At least put a disclaimer in the first post lol. People these days are so huge in to running a lower (most of the time unneeded) impedance and then when the thing pops...oops sorry. And no one is hating (not me at least I still run Skar lol). It's seeing an amp posted up doing something like this with little info to go on that throws the red flag. Can the amp do these numbers? Sure, but how were these numbers attained? And Sactown916...Efficiency @ 4 Ohm : 85%< It is listed

I know these amps(Skar)and others like CT Sounds, Crescendo, Shok industries don't have the Efficiency % listed. The ones that did were Sundown, Digital Designs, Ampere Audio and Incriminator Audio. I didn't look up any more. Now we all know all of these amps can put up impressive numbers, but can someone tell me why some don't put the efficiency %? I actually would like to know every test result before buying. Which is why I bought my NS-1 and a .4. Just curious cause I thought these amps went through a ton of test before being sold. I asked one of the company's about the % and his reply was he didn't have that info in his R&D testing results. It may mean nothing cause I'm not an amp guru, but it kinda put up a red flag and I bought from someone who did have it. With that being said I have nothing bad to say about any of the mentioned amps cause I always hear/read good things. I'm just curious about that info.

This has my vote.

Alright so one last one

You also know, that the .5 load test, is reactive right? .Not nominal....Would you wire to like .2 ? I thought it was nominal not reactive. Like nominal would mean that it is always .5 and a reactive load would change. Could be wrong though. No, the Dyno tests using purely resistive loads. It is NOT subject to any type of rise. If a test is done at 1 ohm, then that is what the amp is seeing for the entire duration of that test. Now that being said, the dynamic test is much easier on the amp and electrical than the certified or uncertified tests. I would be very surprised if that amp stayed on for a .5ohm certified test. And for the fact that he simply states they will not warranty the amp at .5 ohm. I don't get why a company would test at .5 ohm load and then not warranty if they are going to brag about results? Still great numbers and loved my 4500s.

Man this is super stuff, I learned it all in physics last year but this is a really good refresher and I can't wait to see what you go into in your next videos. Thank you very much for making these! It takes some real effort to teach it and go through it in a way that anybody can really get a grasp on. You seem to naturally be a great teacher!

been installed for a bit now, before amps went in

Tahoe Build local shop did: quad mechmans, all XS Power wiring, d3400 under the hood and 4 d3100's mounted under the truck where the spare tire was Soon to be in my civic: XS Power FTW! Thanks Nathan!

Hows this?

Yes, FedEx has done a much better job so far. We couldn't handle eating the cost of the damaged batteries from UPS.