The Truth about Stetsom amplifiers

[Upzaw2000]

So they draw about 700 amps at 12.6V through 1/0 gauge inputs?

1/0 is maxed at 500 amps i thought.... maybe a little lower

 

[groundpound4200 5,000+ posts]

700*12.6=8820

8820*85% efficiency = 7497

 

[duece212 5,000+ posts]

1/0 is maxed at 500 amps i thought.... maybe a little lower

At what length of wire and what voltage drop?

I think the single 1/0 input on these is why people build bus bars that plug directly into the amp to run multiple 1/0 runs to it.

 

[Upzaw2000]

At what length of wire and what voltage drop?
I think the single 1/0 input on these is why people build bus bars that plug directly into the amp to run multiple 1/0 runs to it.

cant remember....

I know that my 40.1 takes 2x pos runs and 2x ground runs.... weather or not its needed.... it is comforting.

 

[duece212 5,000+ posts]

cant remember.... I know that my 40.1 takes 2x pos runs and 2x ground runs.... weather or not its needed.... it is comforting.

...and easier than trying to bus bar multiple runs into a 7kw amp //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[stetsom]

we are doubling the power inputs by the way //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif this is something thats needs to be done!

 

[dB-r 10+ year member]

Sounds like a beast. Just hard to believe the efficiency would keep it from overheating, even at 85% which I would think is max for any class D amp, would leave 15% of that dissipated as heat, so if that is 7200 watts that still leave 1080 watts to be dissipated as heat, seems like it would take a larger heatsink (even if it's good metal) to get rid of that heat. I would love to try one out, though my test sub would not hold that kind of power, nor my battery bank, so I would have to upgrade everything to really test it hard.

I am not a rocket scientist, nor a "metals" guy, so can someone here who may be, please calculate how much surface area would be needed in standard alluminum alloy to disipate 1080 watts of heat?

As far as repairing them, looks like a breeze, while I haven't seen one in here yet, I get everything in here from Audiobahn to Zapco, so I am sure at some point I will see one. If you wanted to send me a sample (working or not) that would be great but don't expect any crazy power testing going on here as I generally leave that up to the manufacturers and my customers who are SPL competitors to do since my setup is geared towards repair, not "balls to the walls" tests. Disappointing for some of you I know... Someone donate me about 4 x 18" subs, 4 or 8 x powermaster D3100 batteries and about 3 300amp alternators and I could make that happen, until then you will just have to test them in your SPL comp vehicle.

If you would like to contact us about repair, the best way is via email sales@db-r.com.

 

[Upzaw2000]

...and easier than trying to bus bar multiple runs into a 7kw amp //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

WORD!

 

[stetsom]

We have a 2000AMP test bench that you would love to play around, lollllll

why cant you just believe that our amps don't go thermal like you say, I can tell you you have to play a lot of time to make this go into thermal protection hehehehe.?

the formula for heat dissipation his (depends on the area where the mosfest are, the way they are spreaded, if you have forced ventilation or not, color, etc.....) its harder than a simple equation, thats why we REAL LIFE tests the amps on UNNATURAL conditions, like leaving the amp under 100F sun clipping for 9 hours, and they don't shut, off course we can simulate this in cars but we would have to bang the s@#@# of the car to make this happen.

 

[dB-r 10+ year member]

Just seems like it would get too hot, and I am just going by what some of my customers have told me about other competitors gear that they compete against. I understand making it smaller to fit in smaller cars, I understand if it's more efficient then it will not get as hot, and I understand using less parts to make more power is a function of efficiency in design, it just seems hard to believe, need to see it for myself so I can understand how it survives.

I am still wanting to know if the output mosfets are being ran beyond their rated working voltage? Guess I will have to wait till I get one in here to check that. Also I am curious about the 100amp 200V mosfets.... I have never seen any.

 

[C3 Customs 10+ year member]

Very interesting discussion, glad to see that people are interested in Stetsom....

 

[dB-r 10+ year member]

Will 4 x Bravox 12's hold a Stetsom 7K? I have someone who would probably be willing to try it out. C3 I think you know who I am talking about, other end of Texas from you but he runs Bravox/IA.

 

[njaykaplan 10+ year member]

The Dual 2s will take a ton of power, dual 4 not so much. If your talking about the EDX, 4 of them would take a new 7kv2 all day long.. I had my Bravox edx on the sundown at 16v.. The single sub, not 2 of them.

 

[hrtbrk1 5,000+ posts]

good read

 

[stetsom]

Will 4 x Bravox 12's hold a Stetsom 7K? I have someone who would probably be willing to try it out. C3 I think you know who I am talking about, other end of Texas from you but he runs Bravox/IA.

Yes they will, Bravox are very good subs and will take the power if 4 are used //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

2 I don't guaranty.

TY

Phillipp nice to see you send me an e-mail so we can resume our conversation`s