Setting gain *yes I read the sticky*

[bruceg 10+ year member]

Ok, I keep getting unclear answers on this. Hook the sub up or don't hook the sub up? Everywhere I read says something different. Any definitive answer on this one?

Also, can someone double check me on my #'s?

My amp does 760RMS @ 4ohms so I need to set the gain to a voltage of 55.1, correct?

760 x 4 ohms = 3,040. SQ root of that is 55.1 (rounded)

Thanks guys!

Click to read more...

 

[travicles 10+ year member]

Ok, I keep getting unclear answers on this. Hook the sub up or don't hook the sub up? Everywhere I read says something different. Any definitive answer on this one?
Also, can someone double check me on my #'s?

My amp does 760RMS @ 4ohms so I need to set the gain to a voltage of 55.1, correct?

760 x 4 ohms = 3,040. SQ root of that is 55.1 (rounded)

Thanks guys!

Don't hook sub up. And yes that voltage is correct. That's a lot of power @ 4 ohms btw nice.

 

[bubbagumper6 5,000+ posts]

Don't hook sub up. And yes that voltage is correct.

this.

 

[bruceg 10+ year member]

Thanks for the input guys!

 

[CRXBMPN 5,000+ posts]

is it a Pioneer 760w amp by any chance?

 

[bruceg 10+ year member]

Naw, this is just a little budget system for me. It's a Power Akoustick 1800 Watt (lol @1800 watts). Cheap amps, but I've used their amps for years and have nothing but good things to say about them.

 

[CRXBMPN 5,000+ posts]

Cool, as long as you are happy then all's well that ends well playa

 

[bruceg 10+ year member]

Hey, it gets the job done. And for the money, how can you complain?

 

[Haunz 10+ year member]

I wish people that didn't have a clue what they are talking about would stop giving bad advice.... //content.invisioncic.com/y282845/emoticons/suicide.gif.a649d21efc0d1fd4890a6428166586c1.gif

If you own a JL Audio amplifier, or any other amp with a tightly regulated power supply then you may not need a load hooked up.... (although I would personally recommend it anyway).... If your amp is unregulated (most amps) then you most certainly should have a load hooked up to the amp... ideallly, not your subs, but a non-inductive dummy load with a DCR that is roughly equal to your subs nominal impedance... you should also be using a true RMS meter...

If you want to inquire as to why you should have a load...... set your gains with no load, then hook up your load and watch what happens to the voltage......

 

[bruceg 10+ year member]

See, this is what I mean...I keep getting different answers. lol

 

[Haunz 10+ year member]

See, this is what I mean...I keep getting different answers. lol

Mine is the correct one //content.invisioncic.com/y282845/emoticons/graduate.gif.d982460be9f153bb54e5d4cb744f6ae8.gif

 

[bruceg 10+ year member]

Hmmm. So with my gain all the way up, it was only at 47volts. That isn't as high as it should have gone up to huh???

 

[bruceg 10+ year member]

Anyone?

 

[whitedragon551 5,000+ posts]

What headunit do you have?

 

[KyleBechtold 5,000+ posts]

h/u SUB setting? where are the subsonic/hpf set at? if they are filtering out some of the 50hz that can do it..

while using a load on the amp is ideal most don't have dummy loads like that.. I sure don't