Hi i dont know how to work out amps and subs can anyone help me a little please???

If an amp has an ouput of 4x 250 watts does that mean i could run some 6x9's and a sub off it???i havent got much money to make a temporary install!can anyone help????

4X250 means you can run 4 speakers off it at 250 watts.
dont run 6x9s and a sub off one amp it dosent work.
the 4 channel amp you got could run the 6x9s and a set of nice door speakers.
then get a mono block amp for your sub.;)

How do i connect the two?ive heard of bridging and im unsure what it is?do i have to bridge a mono and stereo amp??

when you say connect the two i presume you mean the input from head unit to amp. it depends on how many rca outlets your headunit has.
if it has one then you want some rca splitters (can get these from halfrauds)
if you have more then you could run 2 sets of rca's (one for each amp)
bridging is where you use two channels on an amp for one component.;)
say you have a 2 channel amp and you want to run one sub
you use the negative on channel1 and the positive on channel 2. this gives you the full power of that amp to the sub if you diddnt do this you would only get half the stated power because its split in to two channels:)

thank you ever so much alan!!!youve sorted my mind now!cheers mate!i am going to buy a jbl gto 4 channel amp!run 6x9's and door speakers of that then buy a mono amp and run a maxium of 400 watts through a 800 watt sub!The only thing i dont understand is the rca's are they where your door speakers plug into??

Just looked on a website i know you'll probably laugh but i have a Mutant1105usb and it only says rca output!Doe sthis mean there's only one??if so what sort of splitter will i need??

Heres what it says about the Main specs of my head unit


Manufacturer: Mutant
Bluetooth: No
CD-Player: with CD-Player
Changer Control: without CD-Changer
Compact Flash Card: No
Display Technology: unknown
DVD Player / Recorder: No
iPod Control: No
MD-Player: no
Memory Stick: No
Microdrive: No
MP3 Playback: with MP3 Playback
Multimedia Card: No
Number of Output Channels: 4
RDS: with RDS
Secure Digital Card: No
Security System: Panel Release
Size in DIN: 1 DIN
Smart Media Card: No
Telephone Included: No
Touchscreen: No
Traffic Message Channel (TMC): No
Type: Car Radio
USB: No
Wattage: 200 Watt
WMA Playback: No
xD-Picture Card: No

rca leads go from the back of the head unit to the amp. they carry the sound:)
the rca leads are basicly phono leads.
if you look on the back of your head unit you will see how many rca outputs it has.;)
if you only have one dont worry just get some splitters and then you can run 2 amps off one set of rca's;) .
just go to any car audio shop and ask for some rca splitters when you see them it will all make sence;) .

555this is what your looking for at the back of your head unit
556 these are rca leads.
557these are the splitters;)

If you have to run splitters you may need an isolater in each line after the splitter to prevent the amps feeding back into each other as well

ooh i forgot that:o
*hangs head in shame*

ooh i forgot that:o
*hangs head in shame*

Thats why i'm here :p :D Nah, I only remembered cos I had this prob in my old car, only 1 RCA and the HU couldn't kick out enough power to run the signal to two beefy amps and I had horrendus feedback. Fixed once I put a baby powered amp (the ones u buy as project kits) into the RCA line and turned the gain on it up a little. Cured my alternator whine as well cos I was pushing a big enough signal through the lines to drown out the noise :D

yea my mate had that whine and he wacked a surpressor behind the head unit. sorted it.

I put 1 on the alternator itself, before i twigged it was the HU struggling. Helped a little, so I left it on. Only figured it was the HU cos 1 day 1 of the amps didn't power up (had popped a fuse for some reason) and the whine totally disappeared. When I powered up either amp on its own it was fine, but powered up 2gether caused the whine to come back, so i figured it had to be the HU struggling.