i was think of picking up a set of 6x9 out of a junk yard is there any way to test themso i know if they work or not

take a regular 9 volt battery along with you. when you find the speakers that you want, touch the positive and negative of the battery to the positive and negative on the speaker ( you may need some jumper wires for this )

it doesn't really matter if you have the positive on the battery on the positive on the speaker. if it is hooked up pos to pos and neg to neg, the speaker will move one way. hooked up pos to neg and neg to pos, the speaker will move the other way.

it would be a good idea to check both ways, to get the full movement of the speaker to make sure there is nothing bad in the speaker.

this can be done with any battery ( I would not go any larger then a 9 volt ), but I wouldn't really suggest holding it on the speaker for any long amount of time.

hope this works for you

I would DEFINATELY use a reg 1.5V batt, NOT a 9V.

A 9V canl over extend the voice coil causing damage to it.

I actually use a 9 volt all the time with no problems, even on stock small speakers.... but I guess it would not be a bad idea to stick on the safe side and only use a 1.5 volt

also you can tell the polarity of the speakers by reversing the batt. Some speakers dont list the + or - .

By connecting the batt to the speaker (only for a second) and the cone pops out the batteries + is connected to the speakers +. If the cone goes in than the terminals are reversed.

and Crash every time I see ur sig I wish my BVille was a SSEi.

9v is the common way to test nearly any speaker. if the voice coil explodes, obviously it was broken to begin with.

Be careful with speakers! It is usually safe to use a 9 volt battery on large full range speakers such as 6x9s or on subwoofers. If you are testing speakers smaller than 5 inchs or so you should use a 1.5 volt. 1.5V is more than you think. A 9 volt could easily blow a tweeter instantly if you hooked it up directly. Also, dont leave any battery on a speaker for more than a couple seconds, as the voice coil heats up very quickly. These are just guidelines. You can do whatever you want and it might work fine, it depends on what chance your willing to take. The battery test is great when testing for phase (hooked up backwards or not) and for seeing if a voice coil is blown, but it isnt always a good test to see if a speaker works properly, just because it makes a sound when you put a battery on it that doesnt mean it hasnt got a damaged suspension or some other problem.