2000 watt amp not working right

[s0rserer]

i have a 2000 watt performance tecknique amp and 2 audiobahn 12'' subs that run 400 rms. on the box of the amp it says 350 X2 channel @ 2 ohm. when i hook up both subs (one sub to each channel on the amp, 2 channel amp) it sounds like there isnt enough power to run the sub, but as soon as i unplug one of the subs the bass is hitting hard and clean, the way i want both to hit. any ideas on why the two cant work simultaneously?

 

[av_phile]

Let me get this right. You have a stereo power amp rated at 350wpc at 2 ohms (where does the 2000-watt amp come in?). IS this 350 also in RMS? And you have a couple of identical passive subwoofers rated at 400watts RMS each that you both connected to the amp's channels, respectively. And they don't sound as powerful as when only one subwoofer is connected, right?

Are the connections correct?

Have you checked the speaker polarities and phasing? LF are most susceptible to cancellations when at odds.

 

[annunaki]

That appears to definitely be a polarity issue. Make sure your positives are going to positives and negatives going to negatives. Inside your enclosure and out.

Also, you amplifier is rated at peak power. Are your subwoofers 2 ohm, 4 ohm, or dual voice coil? Your amplifier, at 12.5 volts, 4 ohms will do about 175 watts continuous power. At 12.5 volts, 2 ohms you would see around 350 watts continuous power. It is quite common on many car audio amplifiers, to find them rated at peak power. Typically, if you divide the power on the box by 3, that will give you a rough idea of continuous output. Basically what you have is a 700 watt continuous amplifier, whether it being 350 watts x 2 at 2 ohms or 700 watts x 1 at 4 ohms mono (bridged). Let me guess, it has a total fuse value around 60-80 amperes.

A true 2000 watt amplifier would have around a 200-250 ampere fuse, require at least 1/0 ga. power wire, and most likely require an alternator upgrade.