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Driver Testing - reduced output

I have Proac 3.8’s.  The right speaker has limited output compared to the left speaker. I tested the cables, amps and other electronics as well as swapping out.  I get the same results.  I tested the tweeter, mid and woofer drivers with a battery and all but the mid “pop” / produce noise.  When I tested the mid with the battery, the woofer driver produced the “pop” but not the mid.  Testing the woofer only made the woofer “pop”.   Question: is the mid Driver bad or is the crossover doing something that is nulling the mid drivers response to the battery test?  The wire is soldered to the drivers, i did not remove the solder before testing.  Thanks in advance!

cdtd
cdtd OP
24 posts
 

The mid driver doesn’t move at all.  I tested at the wire terminals of the driver, though with the crossover still soldered to the terminals.  Does that indicate the driver is bad or might i still have an issue at the crossover ?  And testing the mid driver makes the woofer driver move.  

erik_squires
16,390 posts
 

Remove the driver from the crossover before you can say you tested it.  You could have a bad crossover component, and testing with a battery won't help tell the difference.

 

gs5556
1,239 posts
 

Use a multi-meter to measure the resistance across the speaker terminals. Normally, the resistance should measure around 3 to 6 ohms. If both measure exactly the same in this range, it's probably not the crossover and instead a driver issue.

jsbail
368 posts
 

I noticed volume differences between my Proac 3.8's . Ended up replacing all four drivers to correct the problem. Sound Organization had them in stock. I forget how much but I remember they were expensive. It was worth it. 

timlub
2,041 posts
 

@cdtd   You do need to completely disconnect the woofer before testing. The battery will tell you if the coil is good, If it pops/moves, you really should still check it with an ohm meter...... I’ve never been inside of this speaker, but I’ve been in many. I don’t know this, but just by appearances, looking at pictures, this driver appears to be an Usher 8945 woofer. I don’t know for sure, but if you need to replace, start looking there.

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