subwoofer pulses

MTX recommends against running this amp at a 1 ohm load, so your 4 ohm load is ideal.

As far as the pulsating, there could be a number of issues. More information would be helpful in order to help you. Are you using a factory or after market head unit, How is gain, eq, and freq, set? And lastly, ground.

im using a aftermarket head unit, the ground is connected from the battery to a capacitor, then to my amplifier. I have not yet set my frequency/gain/eq because i don't want to over do it. How do you know how far to set/turn each dial?

I used to have this mtx 81000d amp hooked to a 4 ohm dual voice sub 500 watt rms that ran a parallel wiring and had all the dials (frequency/gain/eq)all the way up. That speaker fried because after it pounded so much it cut the wires that connected to the terminals. but it sounded good.

Idk if the pulseing is caused because its a brand new speakers and has to be worn in?

Your ground should be set to the car's ground not the battery. Read in the faqs and you'll see I'm correct. I had a similar problem when I was younger, but I can't remember what had caused it.

how do i set the frequency and eq knobs on the amplifier, i know how to set the gain, but im shady on the freq and eq knobs? any help is appreciated thanks alot

I'd just take it to someone who know's what they are doing to look it over. I'm pretty positive that the amplifer is not blown but the ground is wrong or something simple. I've fixed many blown amplifiers a long time ago and usually they either draw massive amounts of power and don't really put any out to the subs or they don't do anything at all.