Setting Amplifier Gain Control

[WhiteTB]

good info here. Ive got 2 sa2500 starped at .5ohm for me is it square root of 5000x.5 and get 35.3? Would I use the positive from master amp and pos from slave amp with the dmm (the negatives are wired together between both amps)or can I just use the pos and neg from the master?

[JZeFF]

good info here. Ive got 2 sa2500 starped at .5ohm for me is it square root of 5000x.5 and get 35.3? Would I use the positive from master amp and pos from slave amp with the dmm (the negatives are wired together between both amps)or can I just use the pos and neg from the master?

Wondering the same thing. I have 2 saz1500's strapped at 2 ohms... No clue where to put the probes from the DMM.

[ktraughb]

You put the probes of the meter on the ends of the speaker wires from the outputs of the amp. If strapped, then the pos and neg you are using as outputs. Of course this without the speakers hooked up, just open end speaker wires.

[ktraughb]

You put the probes of the meter on the ends of the speaker wires from the outputs of the amp. If strapped, then the pos and neg you are using as outputs. Of course this without the speakers hooked up, just open end speaker wires.

[Deadly hertzz]

I adjusted my gain using a chart from a

Formula and used a volt meter and I was

Wondering if i installed a line driver if

I would have to re adjust my amps gain again

[252chevyboyz]

I have a couple of questions on my amp. It is a Planet Audio BB1250.1. It is running 2 Treo SSi 12" dual 4's and is wired to 1 ohm.

First, I was adjusting the gain today by ear and it has the gain setting but also has a input sensitivity switch and you can select either 100mV-2V or 2V-8V. When I switch it to the 2V-8V setting and adjust the gain, there is no difference in output. The subs are playing but very low. Now if I switch it back to 100mV-2V, the gain setting actually changes output. Anyone have any ideas on why there is no difference throughout the 2V-8V setting. The deck is a Alpine 9813. Eq for lower frequencies are either flat or - (which that setting is not being changed during the process) and subwoofer level control at 12 also did not change. If I understand correctly, the subwoofer level control acts as an control for the level output. I have read that the deck puts out 4V with subwoofer level control at 15 but will be less at a lesser setting.

Second, the amp came with a birth sheet that has it at 1251@1 ohm. I don't want to dig the birth sheet up but I believe that the rating was with 12.x or 13.x v of power. The voltage readout that I have at the amp never really goes below 14.0V. Would the rated power be increased, even by a little, with the higher voltage rating or is it the same from 12-14.4V like some amps?

Thanks in advance.

What's up y'all I got the same question as the member above. The input switch when set on 2-8v makes the subs very quite and have no movement. When I set the amp on .1-2v the gain actually makes the subs hit and has a fair bit of adjustment to the amount of output power. Wondering why this is.

I am running a soundstream rub2500.1d @ 1ohm. I just don't want the gains set to "strong" and mess the amp up or make it over heat.

HU:

Bass: 0

Mid:+2

Treb: +3

Subwoofer level: 6/6

Preout voltage: 5v

[ZachG]

How do I find out the voltage thing for my 2011 zx1500.1. I don't see it in the manual anywhere. The one the no video says to get