Funny sounding speakers

[starstruck]

Hey guys, got a question for any loudspeaker experts.

Ive got a pair of Behringer B212 speakers that I use for a mobile disco, I use them in parallel with a pair of Behringer B1520Pros and they sound pretty good (for the price !). I haven't really noticed a problem with them till I had them set up in my house and if you run them quietly they sound terrible ! They distort like crazy!

I tried an audio test CD that does various frequency sweeps and they sound fine but when I try real music they are bad ! I swapped the cabinet out with some other speakers I have and they were great !

Im going to order new drivers but Im curious to the technical details of whats wrong !

I obviously haven't blown the coils and theres no sign of rips on the cone or the spider so what else can it be ??

Is it possible to heat up and deform the voice coil by over driving them ?

Is it possible to recone them ?? Suppliers ??

Thanks folks
Kev

[infinia]

Hi
Have you tried other sources? I've listened to "blown speakers" for a while on my computer that sounded good with tones but when I updated the player the problem was fixed. It's rare that both speakers go at the same time.

[starstruck]

Yes, I was driving them with a EP2500 amp but I also tried a peavey PV1200 it it was the same. I also drove the amp with two different CD players and again it was the same. A different set of speakers sounded fine as well.

Like you I find it strange that both do the same thing ! The have been worked hard but I would have expected them to blow completey.

Kev

[chris661]

Hi - you said you use them for disco, so they would probably be PA speakers, and PA speakers are made for loudness, not quality... so try turning them up a bit, preferable when SWMBO (She Who Must Be Obeyed) is out - I'm no expert on PA stuff, but I know they're not made for quality

[chris661]

PA speakers are meant to be driven loud, so driving them quietly would mean the speaker cone could ripple, and because its quiet they wouldn't ripple a lot, just enough, so yes the music will be distorted as Hell - try them louder - if this doesn't work, I agree to getting new drivers or speakers altogether

[starstruck]

Yes they are PA speakers - 12" 300W RMS . Luckily I don't use them much now , I just invested in a 2KW Mackie active system that sounds AWESOME ! The bass shakes your fillings out ! (I don't gig them like that)

Just tried ramping up the volume (SWMBO was out shopping!) and one speaker sounds fine but the other is still distorting.

Ive got new drivers arriving tomorrow hopefully and that should fix them but Im still curious to what the fault is ! Im a curious soul .

Thanks
Kev

[Ron E]

If it is a scratchy buzzy sound you may have distorted a coil. I doubt you can see the tweeter suspension, and that may have ripped.

I wouldn't rule out frying a crossover component, but I would think that would cause an open or a short rather than distortion....hard to say without hearing the problem, or a lot more detailed explanation of how it sounds.