My phd2 amp is hooked up but it making my subs hum for some reason no bass just a loud hum y is this

Recheck your connections from deck to "non-sub" speakers. Are you using an adapter from deck to vehicle wiring harness OR are all wires individually connected?

Vibrations from inside the trunk which is acting like a boombox is releasing the latch due to high Decibels.

If your head unit has an amp gain, turn it up as high as it will go. If it is hooked up to subs, the head unit will say subwoofer output in the menu. Then take a small screwdriver and turn the amp gain on the side of your amp counterclockwise to zero. Turn your freq. up to about a third. Crank your system up, with a song with good bass, and slowly turn your gain up till the bass from the subs sound distorted, and back it back down. If the bass is drowning out the other speakers in your car, then turn the gain down some more. I find it works best if you have your trebble up high, your mid range at a little less than half. And your bass at zero or one. Your amp is cranking up the bass, so let your other speakers handle the rest. This allows it to sound clearly at higher volumes.

U need to turn the gain up and it will make it more bass and turn your loud on on ya cd player and if the amp has to channels get sum splitters then u can use both channels and it will make it louder hope that helps

does the new amp you have have a hpf setting if so check to see if thats on, turn off the x-over so it will play both lpf and hpf, bass and treble. are all the speakers wired to the amp aswell, this is the only thing that would stop bass other than the head units settings.

Well if you have an amplifier you should be able to change the setting on the amp or check your bass, treble on your stereo. This will make a big difference if not then you don't have a very powerful amplifier or subs..

Good Luck!

www.crutchfield.com has a "what fits" section, it will allow you to pick a new head unit that will fit the stock size of your SUV. As for as Amps, a Bass tube or Subs, they will help you too. They sell you have any thing you will need. Remember, this tip, grounding cables need to be drilled or bolted to a non-painted surface to the chassis.

Umm.. subs are usually meant for bass. do you mean amp power wire? if you just want to be able to hear the mid's and highs better just turn the bass down either on the equalizer on your amp or on your cd player.

The sound system is exceeding the capacity of the Alternator, it takes allot of power to run the subwoofers, they make higher output alternators for just this situation, u will need one with at least 130 Amps output.

This is normal. I also have a 2000 ES300. This became a problem when i tried to run an aftermarket sub off of the wire leads from the stock sub-woofer. When I would switch the radio off there would be a loud, deep, constant bass tone. As far as I know you cannot stop the voltage from continuously supplying the sub-woofer this is the way the factory amplifier is programmed, however, if you cut one of the wires(youhave to cut because wires are soldered to sub-woofer) the humming noise will not occur when radio is shut off. Cut the wire in middle and add crimp connectors so you can reconnect later if needed. You only need to cut one and it doesn't matter whether it's the black or red wire.