Sub making horrible thumping garbage sounds

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would definitely look at getting it repaired. These new amplifiers can't hold water to an old school Zed audio hifonics Zeus.

if i were you i would put the switch to 4ch and the run one sub from ch1-2 bridged and then ch3-4 bridged. I would have to bet this amp is stable only to 4 ohms bridged with so many channels

yes you have a internal fault of the amp. the circuit that puts it into safe mode is bad and or a channel or power supply and that is a very small chip on the board know as a op amp. needs to be repaired.

There may be a cracked solder joint on the main PCB.
also - check the wiring.
There should be no noise if the radio is off.
When it's on - remove the RCA cables... and see if the noise persists.

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no sony has like 400 rms on that amp. eventualy u will blow the subbs. buy the hifonics 1608d amp to power thees subbs connect them all positives together at amp terminal and all negative together at negitive on amp terminal. this will make it a 1 ohm load with around 1400 true rms so around 500rms each sub.this amp on ebay runns like 250 and is worth every penny

Hello king3132,

Three 4 ohm subs can be wired parallel for a 1.34 ohm final load or series for a 12 ohm load. If you have the channels of the amp bridged, I hope that the subs are connected in series because the Sony XM-2200GTX is NOT rated for or stable at 1.34 ohms. It's only stable down to 4 ohms.

You definitely will not get the maximum potential of the subs from that amp. They can handle 400 watts RMS each (total 1,200 watts) and the amp is only capable of 500 watts RMS into 4 ohms (less at higher impedance), so each sub could only be getting a maximum of 166.6 watts RMS.

Hope this helps.

Sounds like your amp has some power supply compents shorted out. Maybe some of the power mosfets are shorted and your only getting a little bit of power. That why only the H is lighting and as far as the green light, it don't take much for it to turn on. If it was major it would go into protect mode but it is'nt. I repair amps for a living and I'm the cheapest you'll find. But if you know about electronics and think you can take a crack at it, check it out. Becareful you could do more damage. Let me know if your interested. [email protected]

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

first off nice choice on the amp check ur power and ground connections make sure the main battery to bady ground is good if questionable add a new one cant hurt to have extra grounds from the batt to the body make sure the amp ground is as short as u can make it make sure its grounded to bare metal if any of these dont work u may have a prob inside ur amp 

you have a foulty amp i wtake it bk and change it

This could be a DC offset condition. Check you manual for what this means. Or other condition. First Disconnect the Subs and try it. If it still goes red then disconnect the RCA's and try it again. If the Led continues to go red after the click then the Amp is hosed. The Click you hear is an internal relay that cuts the subs in after a dely so you do not get the turn on THUMP of the radio at your subs.