Visonik v4000xd not putting out as much power as I would expect.

[Asystole 10+ year member]

So I just bought a Visonik v4000xd on here, and decided to hook it up to check it out.

Rewired my Fi Q to 4 ohm.

This thing is supposed to put out 2.5 kw rms at 4 ohm.

So I turn the gain all the way to 0 turn on the car/HU and start turning up the gain to set it up.

Half way up, barely hearing the sub.

Gain all the way up, it sounds to be about 3/4 what my US amps md1d was pushing.

Now, I don't have 1/0 going to it yet I do have 1 gauge going to it. But it's not even dimming my lights like the md1d did at 1200 watts @ 1ohm.

So what am I doing wrong here?

Click to read more...

 

[infamous_e46 5,000+ posts]

cant you wire it down to 1ohm ?

 

[Asystole 10+ year member]

If i took out some resistors, its 2 ohm stable.

 

[infamous_e46 5,000+ posts]

hmmm

 

[Asystole 10+ year member]

hmmm

That's what I'm saying.

I dont think the amp's messed up I just don't see what I'm doing wrong here.

 

[sexy 10+ year member]

check with a dmm to see if you are at 4ohm maybe something there is not right i have done that before with a new amp i thought i was at 1ohm and all along i was at 4ohm.

 

[Asystole 10+ year member]

yep im at close to 4 ohms

 

[Vossy 10+ year member]

That's 2500w rms @ 4 ohms at 16 volts

Idk what it is with 14 volts. But maybe the sensitivity has a wider range then the US amps.

Are your settings on the deck optimizing the prevolt outs?

 

[Asystole 10+ year member]

That's 2500w rms @ 4 ohms at 16 voltsIdk what it is with 14 volts. But maybe the sensitivity has a wider range then the US amps.

Are your settings on the deck optimizing the prevolt outs?

# Rms Power @ 14.4V DC: 1 x 2500W @ 4 Ohm, 1 x 3500W @ 2 Ohm

# Rms Power @ 17V DC: 1 x 3000W @ 4 Ohm, 1 x 4000W @ 2 Ohm

But I dont know that I have my deck's preouts set to a certain voltage yet, time to read the manual on that one,

So the amps spec say that 0.2 - 8V RCA Input Voltage if I have the ability should I set my HU to 8v output?

 

[Vossy 10+ year member]

Many decks only go to 2.5v, not many at all go to 8v. Nicer decks go to 5v. Read up on your deck. And then remember it's that voltage at near max volume

 

[chode_d 10+ year member]

probably the input sensitivity on the amp. line drivers are always worth the buck.

 

[heyitsmekyle15 10+ year member]

Lawls at visonik. Get some clamps......

 

[Asystole 10+ year member]

Hu's max preout is 2.2 volt so I guess you're right about the line driver.

I still havnt turned my HU all the way up, I'm at 50/62 because I'm worried about the HU clipping the signal. Is that a dumb idea?

 

[Vossy 10+ year member]

Hu's max preout is 2.2 volt so I guess you're right about the line driver.
I still havnt turned my HU all the way up, I'm at 50/62 because I'm worried about the HU clipping the signal. Is that a dumb idea?

No that's not dumb, just tune the amp with a multimeter or oscilliscope.

 

[NFAMOUZ 10+ year member]

no, that's a great idea, the highest I crank my head unit is 28/35, I think only retards crank the volume to the max lol, if I'm not mistaken most head units produce higher distortion after 3/4 of volume, but I could be wrong