You can run one 1500D on one healthy battery for a daily system no problem... but you aren't running them at 1/4 ohms like Yuli was in his Street-A car. That is not a realistic scenario for the 1500D daily. You don't see most people driving down the road burping tones @ 1/4 ohm do you?

Any more than 1500 watts from ANY amplifier and I always suggest that customers run a high output alternator and have an extra battery. This would be if someone wanted TWO 1500Ds. And again... they aren't being ran at 1/4 ohm in a daily system either. I don't consider one battery a realistic electrical setup for 3000 watts.

If a competitor asks me about burping them that low I will suggest more than one battery as one battery is not realistic to burp the amp at 1/4 ohm, plain and simple, it wasn't made for that.

They will actually do quite well in SPL with healthier electrical backing. I have several SPL competitors running 1500Ds and 3000Ds -- most of them don't run extremely limited Street classes, though, they tend to run classes that allow more electrical upgrades.

The amps are very efficient at their rated load... but don't stand a chance when ran down to insanely low impedance on limited electrical setups vs. purpose built SPL amps.

 

what about sundown is that ok??

 

Thanks, good to learn something now and again.

So basically the Sundowns are not suitable for street class spl competition, but should do ok otherwise.

I'm an Sq kinda guy, so I will admit that I don't know all the players nor the rules, but it's good that you can at least admit where your amps do well and where they don't.

From what I saw of the testing done on Sunday, the Sundown amp owner/ops were fully involved in setup and wiring, it wasn't just the anti-sundown guys setting things up to favor their equipment.
I think that Sundown got a fair shake as far as setup, at least as well as could be done with the equipment at hand.
In a lab, with properly documented testing done by at least two impartial electrical engineers, there may have been differences.
But, I think that the test being done as it was, really showcased what might happen to the average competitor who buys a Sundown amp on friday afternoon and installs it in time for a saturday comp.

 

Correct, Street dB-Drag is not what they are made for. All of my customers that buy the amps and actually use them for what they are made for are very pleased with them.

Brad was there for testing, yes. But he was not thinking hard enough about it at the time to realize that the gain setting method was flawed. It is also obvious that the impedance that the 1500D was purported to be seeing is 21.6% higher than what the comparison amp was seeing, yet again making the test flawed.

No offense... but it doesn't show in any way what the average customer will do with the amp. The gain ***** were all the way DOWN with no effort made to set the gain properly for the input impedance / sensitivity of the amp. If anything your average Joe is going to slam the **** all the way UP... not that this is the correct way to do it, but it tends to be what people do.

I'm not going to say that the test was skewed on purpose... but the testers did not take the time to do it correctly. I would expect that they would realize their mistakes now that they have been pointed out.

 

it is funny not to say it
then you can't say it
new rule

 

so what is this amp made for? to be ran at 1 ohm with 3 batteries behind it and a 250 amp alternator?? cmon man, you are digging yourself into a deeper hole every time you post.

what you are basically saying that the 1500D, which is a smaller amp than the z1 requires more current to work properly than the bigger z1 amp? that is not true and you know this. you said my statement about the z1 was biased b/c i used it in an spl set up. so what u are saying that at if i run the z1 at 1 ohm (where its rated) and a pair of sundownz at 2 ohm strapped (where they are rated) the sundownz will be louder? but how many batteries and alternators will i require??

once again, you can send me one of your amps, i will put it in my car with two hawker 2150 batteries and we will do an "unbiased" test for power output at any ohm load you want. we will not do any spl measurments cuz thats biased, just use the clamp meter to see the power output at variouse ohm loads. how's that?

i have to ask tho, is it a big surprize if the amp did not produce its rated power? especially after impedance rise.

 

No, you simply aren't understanding what I'm saying. If you read carefully you will see that I am not digging a hole at all.

The discussion with you was regarding TWO SAZ-1500Ds @ 1/4 ohm each (the way I understood you to have used them). They aren't made for this and aren't terribly efficient at this load or under 1 ohm in general. Hence why they aren't going to compete with the Z1 in a Street-A setup. To run at extremely low loads they are going to require more backing than the Z1 to perform to their full potential as the Z1 is made to burp with limited electrical setups.

At 1 ohm the amps are perfectly fine on a healthy stock charging system, and are quite efficient at this load. I stated this above, perhaps you missed it. I've sold 100s of these to people who love them.

I'm not saying using it in "an SPL setup" makes it biased. I am saying YOUR type of setup, being a single battery Street dB drag setup and trying to burp TWO 1500Ds @ 1/2 ohm strapped -- this is NOT a good setup for them and I've said that straight forward. The Z1 was made FOR that class, it darn well better do well there.

I'm also not saying for sure that they will ever be *louder* than the Z1, but given a good electrical system to back them up they will be much *closer* to the SPL output achieved from a Z1. They could potentially come VERY close to the output of a Z1 with a large battery bank.

I'm not sure exactly how much power a Z1 will put out under ideal circumstances, but the testing I did with Sean Belanger showed 5677 watts from his pair of 1500Ds @ 17.9 volts dropping to 15.5 volts strapped at 1 ohm (0.5 per amp) with a significant battery bank and a large high voltage alternator (around 200 amps).

 

Crappy results with an improper setup... they didn't set the gain on the amp. Simply threw it in all the way down with no attempt to optimize the results.

 

i wonder what a sundown would actually do with 24v's. that would be sick.
next test maybe jake?