sub blown?

Y do u think it's blown?

they did start to smell for a minute, but the dmm still shows resistance on it

Yea ... the impedance of the individual coil will change "widely" based on alot of things... The key thing is that its still showing impedance.

Things that alter that reading would be
1) Placement of the coil inside the motor (Since it was resting this can be mostly thrown out, but consider the possibility if it was warped and placed abnormally inside the motor)

2) Ambient air temperature. The more heat outside of the coil, the more heat that gets transferred via conduction to the coil; thus the impedance increase.

3) Coil temperature (a product of power/thermal compression as well as ambient air temperature)... Like in reason #3, the more heat generated in the coil as a product of normal operation, the more resistance you'll have in the coils as a by product of thermal buildup. Also, you may have some clipping in the signal somewhere along the signal chain, even though it is not audible, the clipped signal doesn't turn into acoustic/mechanical energy, but rather, thermal.

4) The DMM's placement in relation to the subwoofer motor. Seems silly, but some DMM's will change their readings based on where you place them around the motor of the subwoofer. I had a DMM read anywhere from 8ohms to 0.6ohms on a single 2ohm coil based simply on where I placed the DMM. The magnetic flux from the motor alters the current inside the machine. Cool stuff, but annoying.

Recone

well idk since the show everytime i play it for a second it smells

any ideas?

Could be breakin or could be going out my 2 pennies

well ill heading to the river and do some demos and see what they do

if you got the money for a recone, i say demo till they blow. Then when you take them apart, we can finally figure you what size coil it is

fritosaregood wrote:

if you got the money for a recone, i say demo till they blow. Then when you take them apart, we can finally figure you what size coil it is

thats what i got done telling him, and could probly build them better

lol they arnt smelling at bad now when i hit low notes they do

You are probably cooking them. Wont be long i suspect and they will be dead. Voltage was good? Any changes to settings?

i turned some stuff down just wait and see i guess if they are goin to blow ill re-cone and rebuild them better

i got some mojos you can buy, haha, then build some 18s out of them

lol im good for now i think theyre just breaking in ill just keep them turned down for now and wait for results

if you blow one, you can rebuild and dominate it the stock class if usaci comes back next year

true but im goin to save up and surprise everyone with something big

So u r thinking they are bad cuz u can smell voice coil? That doesnt mean they are bad just getting hot when u start to smell them turn the volume down lol. EVERY spl system that I have competed with made the coils smell at some point that is how u get loud max em OUT!!!

made a video today and notice the subs coil is rubbing not good at all see what i do at the conway show

R u saying you noticed the coil rubbing in the video?

well i haven't been playing the subs until i was going to make a video and when i turn them on i heard one of the subs coil rubbing i guess it had nothing to do with video at all sorry for confusion

How did you hear a coil rubbing?

i played the subs at low volume and put my ear to the subs