Leaderboard

I like the way you think sintorman, I just think the way you express yourself might get you banned here. I totally agree with mrd6 though. There was a flaw in this test that was easy to overlook, but now that its been brought to the attention of everybody I don't see why you can't just redo the test. Its not that the amm-1 or amp dyno is worse because of a redo. If anything it will prove they work consistently. But I would just be weary seeing a salesman keep up an advertisement that he knows is false and slandering his competition.

See now this to me is where it gets interesting. Now since you are posting a cheaper alternative people have choices. From the clamp tests I've seen people do it's a dmm and clamp, this is my first time seeing a scope or true rms meter for such a low price. Still comes into factor of how well the user can see clipping on the scope.It would be nice to see a comparison of equipment like what sintorman posted and the amm1. Take a look at that scope and tell me you think it will be accurate. http://www.electricstuff.co.uk/velleman_hps140.html Everything has its place and if they are used right the results will be true, but if you use cheap equipment or use it in the wrong way you will get inaccurate results. It's only cheap because it uses 1 channel and can't measure high frequencies.. something that doesn't apply in the car audio industry. It's a damn good scope for the money. You should be listening to what I'm saying.. I could save you a lot of money. But nah you should just listen to the mfg for the dyno and amm1.. he's not biased at all. ROFL. Tony props to you. Laughing all the way to the bank. Look here im a grown ass man, i don't have to listen to you. who the hell are you. How many tools have you brought to the market. You also don't have to worry about saving me any money. I worked for my money and i will spend it the way i see fit.. Plain and simple get a name for your self first, then maybe we would start listening to you. I would listen to an engineer before i listen to a nobody. Just because you don't know who I am doesn't mean you can't use common sense. Typical CA guy here. Oh man if he's not hitting a 160 then he's just an idiot. You are what's wrong with the industry. You rely on people to get your answers without using your damn head and actually learning why things happen the way they do etc..

Man...this thread... Let's sum it up, AMM-1 is not the only way you can get reasonably accurate power results. Using a scope with true rms clamps and meters will get you there. That being said, the AMM-1 takes alot of the work and math out of it for those who could not do it otherwise. It's a tool, like any other tools, there is always another way. If you use a jig saw to make your sub cut outs why buy a router and circle jig? Because it is easier to get good results. But that doesn't mean the guy who uses the jig saw is suddenly doing it wrong. The same logic can be applied to this situation. Clamping with the right tools and knowhow will give you accurate results. Im sure this is why Taylor and that sinterman dude as well as myself are frustrated after reading through here and watching the vid, since it is suggesting that clamping will never be accurate which is really not the case. I think the AMM-1 is an awesome tool but it's just kinda shitty to start misleading the general audio community for a marketing campaign...intentional or not, it's happening

Velleman HPS140I 99$ Craftsmen clamp meter 72$ Fluke 113 true rms meter 116$ Sorry just under 300$ and you can clamp your amps power for efficiency as well as many other tasks you can do with these three items vs the AMM1.

I'm not against the amm1.. Seems like a neat tool. However I am against people making videos misusing equipment and praising the equipment that was used properly. It's just low.

Did I argue against the accuracy of the AD-1 or AMM-1? Nope. *I* happen to be one of those people with the proper tools, so yeah... I take offense to the way clamping is getting shit on in this vid. If the vid was just about how awesome the AMM-1 is, I'd have just said, "Awesome. Can't wait to get mine." But the focus of the video is how far off the clamp is, when in reality... it's not.

I'm not bashing the dyno or the AMM-1. Or even taking up for clamping for that matter, but the way the test was done using the dyno for the clamp portion isn't the best way to illustrate the difference. Cody retested the amp. He videoed the clamped portion this time. This is a screen shot of the 900w clamp result. Pay particular attention to the wave on the scope-meter The dyno and AMM-1 stop reading at 1% THD. Does that look like 1% to you? Yeah... me neither. This is much closer. This is a screen shot of the same vid, but while the wave is still clean. That's 570w and MUCH closer to what the dyno and AMM-1 are seeing. Clamping is flawed because of the phase angle on reactive loads. But he isn't using a reactive load here, is he?

Please take this viedo down. It's extremely misleading.