Sundown SFB 3000D Clipping

[EmpiricalApe]

I have a Sundown Audio SFB-3000D Amp wired at 1ohm. I have the gains set somewhere between 1500-1800 watts. I have an xspower d3400 and a mechman 260amp with a "big 3" 0 guage ofc kit as well as 0g ofc amp power and grounds. This amp should be able to do 3k watts rms @ 1ohm, but I'm clipping around the 1700w range. Any ideas why?

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[1aespinoza Premium Member]

Any ideas why?

The radio output voltage may be lacking.

 

[EmpiricalApe]

The radio output voltage may be lacking.

it does it before the radios distortion point of 31

 

[1aespinoza Premium Member]

it does it before the radios distortion point of 31

Does the radio volume goes to 45? If no, then the volume may be too high. Are you reading the clipped signal with an oscilloscope or does the amp have an indicator?

 

[djdilliodon!]

Soon as the subs start playing, the amp isn’t going to see a steady 1 ohm

 

[hispls 5,000+ posts]

I have the gains set somewhere between 1500-1800 watts.

That's not how gains work.

 

[EmpiricalApe]

That's not how gains work.

by that I mean I did the math and set the gain with a multimeter to the voltage that corresponds with the rms power of the sub, plus a little extra.

 

[EmpiricalApe]

Does the radio volume goes to 45? If no, then the volume may be too high. Are you reading the clipped signal with an oscilloscope or does the amp have an indicator?

the radio maxes at 40 and idk how accurate it is but I used test tones to see when I could hear audible distortion from the speakers, and it's night and day from 30 to 31. And yes, the amp has a clip indicator.

 

[Firewalker]

Ohm's Law Calculators and Formulas

www.the12volt.com

For 1700 watts at 1 ohm it should be 42 volts roughly on the dmm. Set volume at 30 and run a 40hz test tone while setting the gain.

 

[EmpiricalApe]

Ohm's Law Calculators and Formulas

www.the12volt.com

For 1700 watts at 1 ohm it should be 42 volts roughly on the dmm. Set volume at 30 and run a 40hz test tone while setting the gain.

that's exactly what I did

 

[EmpiricalApe]

that's exactly what I did

I did it with a 0db test tone, would that have any difference?

 

[spokey9 5,000+ posts]

Did you set the gain with the engine on or off?

 

[hispls 5,000+ posts]

the amp has a clip indicator.

Which is only telling you when your amp is approaching whatever the manufacturer deemed to be maximum output voltage.

 

[EmpiricalApe]

Did you set the gain with the engine on or off?

vehicle on, with sub disconnected and dmm leads to the amps outputs

 

[EmpiricalApe]

Which is only telling you when your amp is approaching whatever the manufacturer deemed to be maximum output voltage.

shouldn't have a good bit more power than that, as it is 3000w rms?