Numerous Amps and Subs Issues

[spineshank]

I have numerous problems that im all stumped about.

My setup is a Sony Xplod amp that does 200 rms @ 4ohms on 2 channels or 500 rms @ 4ohms bridged. Subs are 2 Infinity 1040's. I have them hooked up to each channel so im not bridging them. Im running 8 gauge Streetwire, and have a sorta crappy looking sealed sub box.

1st problem subs get power fine but i was having a connection problem with the RCA plugs. The plug actually got the wire pulled out of it so its shot and i need new wire. Problem is that with the 1 plugged in i still have the subs working as if the other plug didnt even matter and i dont understand why.

2nd problem is with the one wire not working how do i know both subs are working. Yes they both have power. I unplugged the one speaker wire from the amp to teh sub box and the sub still had power. How is that possible? Its not like have the wires inside the box interconnected or anything weird.

3rd problem is i get massive rattling. My old system i had 2 100rms subs bridged and got no rattling so i realize im twice the load rms wise but even if turn the subs down a lot as soon as i get any noticeable base i hear massive rattling.

[Jet-Lee]

1) I don't know
2) It may just be vibrating from the vibrations created by the subwoofer next to it, esp. if they have a shared volume.
3) different tones produce different rattles, as well as volumes, even differing excursions. Say your playing a 50Hz test tone on your old subs at 1/2 volume. Maybe that creates a decible reading of 110db (hypothetically). then you play your new subs at the same tone, volume down to get the same decible. If they move more, they will displace more air which can make more things rattle than the old system.

Make sense?