Lack of bass, and distortion

[VTRs4xo]

Hi everyone please don't get annoyed with me if this has already been asked.

I have just replaced my front door speakers with a pair of edge ed305 210watt speakers (not the best make I know but money tight and all that) Im using standard wiring and only head unit to power them (Sony mex-bt3100u) but since fitting them they sound hardly any different from the standard ones, there's hardly any bass and they start to distort when you turn them up. I've tried another head unit incase it was the stereo but they still do it. Can anyone give me a clue of what I could change/replace/repair that may sort this issue. Diagrams, instructions, links anything like that would be great help. Also is there a way to tell which is negative and which is positive as neither have the little line down the side. I'm pretty sure I've got it right but wanna be 100% sure

[MuZiZZle]

Did you run them in for a few hours?

You may have shagged them if they're the same with both head units

[Jizanthapus]

I'd say you probably got the neg and poss mixed up on one of the speakers when you put them in. Try swapping the + & - over on each speaker separately.

[Manu]

+ / - connections are indicated on speakers, not sure how you messed it up in the first place.

Also as above, new speakers need running in gently, blasting them out of the box while wrongly connected probably killed them. Seen that before.

[VTRs4xo]

I know the speakers have a - + but I mean the cables don't have so wasn't sure which is which, I've also not cranked them up as I know about running them in. Could it be more the fact the wiring is the wrong way round or the fact it's only stock speaker cable?

[Stevie_Talent]

Your best off just running some brand new audio wires from the headunit to the speakers as the original speaker wires are so old and rubbish! i run new wires to all my speakers and it sounds brilliant! the rear speakers are a bit of a pain to get to though!

[VTRs4xo]

Sounds silly and maybe an easy question to answer but that's what I was thinking of doing that just running some 18 gauge wire from the loom but is it literally snip, crimp, feed the wire through and connect? Do you know if there is a wiring diagram online so I can find out for definite which one is + and - so that way I know which one needs to get where.sorry if any of this come across as me being a numpty. Would it also be worth putting a little mdf template under the speaker so it's not metal against metal?

[Jamie]

Upgrade the wiring & install an amp.

HU probably isn't enough to supply the speakers and the wiring also.

Try the wiring on it's own first it will improve it but to get what you really want the speakers need to be controlled properly to get the best out of them.

I just installed a sub/amp/system, but will need to add an additional amp to run my speakers properly. It sounds good etc but will be much better with the second amp.

[Scott]

Your problem is your trying to run speakers that are looking for 210w (i assume this is the max figure) and you have a head unit that even on its best day will only supply 52w(max).

The headunit simply cant supply enough juice to get the speaker moving properly.

Lastly your not going to get bass from them. I assume they have a cross over that will split the highs to the tweeter and then cut the low bass and leave mids to be dealt with by the 13cm speaker.