I need quick help before I go buy this amp at noon!!

I need some quick help before I go shell out money for this amp and I think I can find a quicker answer here, Im suppose to meet the guy at noon, its 8am now, .. here we go

The amp im going to be lookin at is an Arc Audio 900.1D, I found these specs online

1 x 350W @ 4 ohms
1 x 750W @ 2 ohms
1 x 900W @ 1 ohm

Im lookin to push TWO dual 4ohm Alpine Type R's, they are rated 500RMS each,

1. so this amp wired at 1ohm should push these subs correct? I know it says 900w at 1 Ohm, but is this amp 1 ohm stable?

2. There is a MONO A and a MONO B on this amp (see pics below), kinda like a 2ch amp but it is a class d mono, when I go test this amp to make sure it works Im takin my subs, I should try both MONO A and MONO B side?? and how would I wire this to 1 ohm for my type R-s?

some quick help before I go buy this amp would be sweet!!!


vvvv WHat the heck is MONO A and MONO B? ?

 

Well I got the amp, he wanted $200 for the amp, I offered him $150, he took it, i hooked it up and it pushes the type-r's VERY well, super loud, I asked the guy what was up with MONO A and MONO B, he said "Nothing, The Mono A and Mono B are the same thing, nothing different, its not 2ch, it is 1ch, You can plug both your type-rs on mono a or mono b or both, it will produce the same", right now I got them both hooked up to Mono A, maybe i should do one speaker to Mono A and one to Mono B, I dont know but its really loud, and I dont have the amp turned all the way up, is it okay to run an amp with the level/gain to the max?

 

Ok, this is some information from my headunit

Maximum Supply Current -
- Decode -
Preout Level(mV)/Load - Unbalanced 2000mV/10kΩ(CD)
Preout Impedance(Ω) Under 600Ω
Speaker Impedance(Ω) 4-8Ω
AMP
- Maximum Power 50Wx4
- Full Bandwidth Power 22Wx4

Does that say where my gain should be on my Arc Audio?

And also, when I hooked this Arc Audio amp up, it sounds good and everything, but when I goto turn the truck off, the speakers go "POOF", only sometimes though, what is that? someone told me it could be a bad ground or the gain is up too high on the amp?? I hate that when I goto turn the truck off and it sounds like my speakers gonna blow by goin "POOF!"

 

Yeah i think I blew one of the type-r's today, had the gain 3/4 of the way up, it was sounding good all day yesterday, and then all of sudden today I was bumping them and I heard a flappin noise, looked back there, I couldnt see no rips on the sub but the right sub, it was makin a flappin noise when it got turned up, so I dont know if its hitting something or if I blew the fu**er up.. ill check it out tomorrow, the other type-r however sounds fine..

 

No bass boost, and bass on the hu is turned all the way down, my hu is a Kenwood KDC-148, Im not sure if the sub is blown, it sounds good until i turn it up kinda loud, then you can hear flappin, maybe its hittin a screw because I had to drill a couple screws awkward when I put the sub in (at least thats what Im hoping) but we'll see tomorrow when i pull the sub out the box to see if its blown

 

1. I dont think my amp has a "2v" on the gain or to see where 2v is, but ill check
2. When i push the sub in and out it sounded find, but Ill check again today
3. I know i drilled an awkward screw in but i didnt think it was too bad, but Im about to go investigate all these scenarios right now.. lol

 

oh ya, this amp has a "Subsonic" feature, its currently off, should i turn it on???

 

Ok, I pulled the type-r out of the box, i looked for tears, rips, anything, I cant find nothing, I turn the Head Unit up to get the speaker movin, and it sounds good until I turn it about 25 or 26 on the HU and then it starts makin a flappin sound, i put my hand on the sub while it was turned up and it didnt make the noise and was hittin hard, but as soon as I take pressure off the sub, it makes that flappin sound, I dont know whats wrong but its probably blown Im guessin??