Gain Setting Tutorial

[ANeonRider 10+ year member]

You will be running the amp at a 2 ohms load, therefore it would be sqrt(1000*2) since the BX1500D puts out around 1000W into 2 ohms. What kind of box are you using?

Also, FYI, I am using one dual 4 ohm Type R.

 

[ndnbolla 10+ year member]

I am using a sealed box. Each chamber has ~1cu/ft after displacement.

Props to InhumanAcura for makin for me.

 

[IgnoreMe 5,000+ posts]

i got a question. im now runnin a single sx in a sealed box. my gain was set for 2 sx's. i do the math and my voltage for 1 sx at 4 ohms is about the same as it was for 2 sx's at 2 ohms. now i wanted some clarification. the reason i need such a high voltage for 1 sub compared to 2 is due to the impedance right? since there is more resistance at 4 ohms im gonna need more voltage to get to the same spot right? im pretty sure im right i just wanna make sure.

 

[ANeonRider 10+ year member]

What does that Viper amp put out at 4 ohms? 2 ohms?

 

[IgnoreMe 5,000+ posts]

4 ohms it puts out 1500 and 2 ohms it puts out 2500. so 2 ohms its 70 volts and 4 ohms its 77 volts.

 

[IgnoreMe 5,000+ posts]

70.7 volts @ 4 ohms = 1250 watts ...70.7 volts @ 2 ohms = 2500 watts ...

77.4 volts @ 4 ohms = 1500 watts ...

77.4 volts @ 2 ohms = Clipping, Audible Distortion, Overcurrent, etc. (If not underrated) ...

so when i get my second sx back im gonna set my gain to 70.7 volts like i had before right?

 

[ANeonRider 10+ year member]

Just leave it where it is, it is still providing the same power, 1250W to each SX.

 

[NJack2AF 10+ year member]

This is gonna sound real dumb, I know I'm a noob I'm only working on my 2nd system right now... But what exactly is clipping?

 

[Acidburn 5,000+ posts]

have you searched?

 

[psycho72 10+ year member]

Any recommendations on a multimeter. I have already been to autozone (analog only), Kragen (digital with a scary rotary knob that I have no idea what all the settings were for and Radio Shack where I got the 29 range digital one for $29.99 but I am unsure if I got the right one of if perhaps I could have gotten a better one for the money. Please help. Thanks.

Edit: Okay 2 pages down on a search I found that someone here has the same one as I do so I guess it will do the job.

 

[pwnt by pat 10+ year member]

Is there any kind of division across channels for bridging? Like sqrt(1 600 * 4) = 80v so 40v per channel or do you do 40v for the bridge 'cause it's bridged? Would it be easier to measure the entire bridge or each channel?

 

[ANeonRider 10+ year member]

Just measure the bridge, since that is the way you will be running the amp. And for example, if you have an amp that puts out 400W into 4 ohms bridged..

V = sqrt(400*4) = 40, then you would measure the bridged channels and set the gain to get 40V across them.

 

[bossman032 10+ year member]

is this correct.

my two id max 12 d2 with the orion 2500d wired at 2ohms = 1700 watts amp watts.

=34volts??

 

[ANeonRider 10+ year member]

is this correct.
my two id max 12 d2 with the orion 2500d wired at 2ohms = 1700 watts amp watts.

=34volts??

Nope,

V = sqrt(1700W X 2 ohms)

V = 58.3V

 

[bossman032 10+ year member]

Nope,
V = sqrt(1700W X 2 ohms)

V = 58.3V

thanks much bro. //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif