Is this ok?

[Xkrtwi]

I have 1000wrms subwoofer and amp that is class d and able to give 1700wrms 2ohm its now connected to 2ohm is it ok that my amp gain is 80-90 of max and the output is 45v measured with dmm. Can this hurt my subwoofer?

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[Lasherž]

That's perfectly okay, but just make sure you use more than one frequency of 0db sine wave files before you write it off completely. The gain knob position isn't an accurate depiction of volume.

 

[SlugButter]

seems ok just looking at the voltage. You’re close to 1000 watts at 45v. You’re gains are set kinda high, but that depends on the audio signal the amp is receiving. What is the preamp voltage on your head unit?

 

[Xkrtwi]

I dont know i havent measured it but i adjustet the amp with headunit volume of 43 so it doesnt clip. I think the preamp voltage is relatively low because the headunit seems old

 

[SlugButter]

I dont know i havent measured it but i adjustet the amp with headunit volume of 43 so it doesnt clip. I think the preamp voltage is relatively low because the headunit seems old

That’s probably why the gain is set higher than it seems it should be. Preamp voltage is probably 2 volts. I switched from a head unit with 2 volt preamps to one that had 4 volt preamps, and didnt have to turn gains up as much to amplify the signal. You may want to consider a head unit upgrade at some point down the road.

 

[Xkrtwi]

Ok but just to clarify is it okay to play the subwoofer at headunit volume 43 even tho the gain almost max?

 

[SlugButter]

Ok but just to clarify is it okay to play the subwoofer at headunit volume 43 even tho the gain almost max?

Sure. That’s what the gains need to be set at to get to get your 1000 watts rms. As long as it’s a clean, unclipped signal.

 

[SlugButter]

What kind of enclosure is your sub in?

 

[Xkrtwi]

Its in a ported enclosure aprox 45 liters, is there a way to know if its clipped etc will it produce more heat then? I dont have oscope yet

 

[SlugButter]

Its in a ported enclosure aprox 45 liters, is there a way to know if its clipped etc will it produce more heat then? I dont have oscope yet

You can probably hear clipping by ear. It will also let you smell burning coils being in ported. You should be fine.

 

[Xkrtwi]

Ok thank you!

 

[Xkrtwi]

Update: i played the sub with volume 43 and after about 25minutes the sub gave a little voice coil smell and little bit warm should i turn my gain down or could the smell and warm be because this setuo havent played this hard before?

 

[Firewalker]

Yes turn down the gain, you have it too high. How exactly did you set the gains with what method? And what amplifier & subwoofers as well.

 

[Xkrtwi]

I set my gains with digital multimeter setting the headunit volume to 43 and turned the sub gain until i achieved 45 volts with 50hz test tone

 

[Firewalker]

Once again what amplifier and subwoofer and head unit? All this comes into play as some head units have lower volt output on the rca's