DMM tuning of amp

[agarabaghi 10+ year member]

Can you use the DMM to tune an amp before a sub is broken in?

I just got my sundown sa10 and i know i need to run this at low volumes for a while before slamming it, but can i still set my input sensitivity using the dmm before it's broken in?

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[Z1NONLY 10+ year member]

Yes.

 

[agarabaghi 10+ year member]

just dont play it at full blast once it's tuned?

 

[Z1NONLY 10+ year member]

Correct. If you tune your amp for full power, it's up to you to decide how loud you want to go to break in your sub. (with the volume control)

If there is a specific amount of power that you don't want to go over while breaking in the sub, you could tune the amp to that (lower) power level.

 

[agarabaghi 10+ year member]

gotcha

thanks

 

[TheUnderFighter 10+ year member]

Sundowns come fully broken in as they are played during QC testing. Now if you're going to slam it on 1,000+ w, be gentle for the first couple days, would be my recommendation to be safe. but if you're around the RMS rating you're good to go.

 

[agarabaghi 10+ year member]

Im going to be slamming ~ 1000 watts //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[disturbed471985 5,000+ posts]

I have never "broken in a sub" and I have never had a failure of any kind..//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[kramer_212 10+ year member]

Wouldn't worry about it sundown makes a quality product

 

[wenn_du_weinst 10+ year member]

sa's don't need to be broken in do to their design, needing to be broken in or not is NOT a sign of quality. I know of tons of HT drivers that need to be broken in some costing over anything available for the car.

 

[agarabaghi 10+ year member]

question... when doing sqrt(watts*ohm) do i do the ohm load that the dmm is seeing or "what it's suppose to be" when i put the dmm on the sub, i get ~1.5ohm while its suppose to be 1 ohm (2ohm dvc) ...

 

[Z1NONLY 10+ year member]

"What it's supposed to be." Your DMM uses direct current (DC) to measure resistance but the amp is going to be sending alternating current (AC) in the form of a music signal. The subs VC is a "reactive" component in that it presents different loads at different frequencies.

The DC resistance is just a "ballpark" reading in this application.

 

[agarabaghi 10+ year member]

Hmm I seem to be getting better results using

Sqrt(1000*1.6) than sqrt(1000*1)

Obviously my volts went from around 31 to 40 but it just seems to react / sound better. I'll have to re do the tuning anyways one the proper box is built and I'm using my 8v pre out eq and not the stock land rover headunit