Power is hooked up. Ground is connected. Both subs are connected. The triangle light is red, and there is now sound. All wires are hooked correctly...

Red triangle is kenwood power light. Check rcas

You have connected it to the wrong power wire - one that is only active in service mode - first key position.
You should draw a wire directly from the battery (don't forget to add a 40 amps fuse on the wire) to the amps. If you don't want them constantly operational (you will have to manually shut them down) install a relay on the wire with the command coming from a wire from the instrument key position - second position of the key. Use a voltmeter to identify the wires.

i have a smaller kenwood amp but it has the same triangle, i had that problem too, so i ran a ground wire from the battery to the amp, with 12 ga wire, and then i also grounded it with the chassis ground, on the big amps its better to have really good grounds and connections

My best guess is that it would be your ground wire or even the power into your amp. I would check all the connections going to and from your amp

when you car is running, it charges the battery somewhat. So the voltage problem is not a problem. The red light means the amp is going into ''Protect Mode". This usually happens when something is wrong with the amp. Usually the amp is getting hot. Check all of you connectiong and check the final impedance of the subs. Make sure the amp can handle the impedance of the subs. If you need anymore help, message me.

Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.

turn down all the knobs all the way, if it still does it you probly have a bad ground connection. check all power wires.

norally grounding them in the same place is ok but it could just theres not enough power from the amp too power two subs try hooking up one and see if that gives you the sound your looking for

a green light is the power indicator, a red light is when the protector is in affect

ground wires(heavy black)is connected when the red light lit.so no need check the red hot wire which is connected to battery terminal maybe loose.or theres no power comming in.thre are 2 hotwire in that amp one is red which is the main and yellow or sometimes orange which is the remote on. now if you sure that the power terminals is properly connected,ur speakers is working and input wires are good and still no sound. your amp is probably gone...do not try experimenting the wires or hook up two amp by any means..u might destroy all ur amp. hope this help u....