Clipped RTi12 - speaker testing

danhirth

After my speakers were accidentally overdriven with a large amp (Sunfire 300, probably clipped), one mid driver on each speaker blew out...volume loss & crunchy movement. I replaced the blown drivers, and the new drivers sound great. Unfortunately, it highlighted that the other mid & probably the tweeters are damaged (muddy, lacking high freq clarity). I plan on replacing those next.

However, now I am suspicious (paranoid?) that the six 7" woofers could also have been damaged. Is there any way to test the woofers in my speakers with a mulitmeter to determine if they are damaged? I'd prefer to test it myself, as the speakers are 88lbs apiece, and a bit difficult to move. I think the bass sounds OK, but its hard to tell with the mids&highs so wrong. Maybe I'd be better off just getting some new speakers if the 7" drivers are slightly damaged.
:mad:
Dan

michael_w

Try slowly pressing in the driver with five fingers circled around the dust cap. If it makes a nasty scratchy noise then it's blown.

shadowofnight

They are ported which makes this easier then the passive radiator polks ( Need to pull radiator or 1 driver on those so they arent air coupled...yours you wont have to do this ) ....just do the 1.5 volt D battery test....you will see if all of the 7 inch drivers move the same distance forward and backwards in regards to smoothness and throw. I made a momentary button little tester for this to cut down on the noise you get touching speaker wire to the battery terminals...but it is a quick and dirty to see if all of your drivers are working ok.

engtaz

michael_w wrote: »

Try slowly pressing in the driver with five fingers circled around the dust cap. If it makes a nasty scratchy noise then it's blown.

and if it does not move it is blown.

engtaz

danhirth

I replaced both mids & tweeters in both speakers. The left channel sounds perfect, the right is better, but still has no tweeter. I checked the (new) tweeter with an ohm, meter, and it appears OK. I'll check the voltage to the tweeter next...assuming it will be nil, what next? Is it possible to repair or replace a crossover in my RTi12? I imagine it's not an end-user serviceable item.

[Deleted User]

Hello,
I'm sorry you're having problems with your RTi12 speakers. Make sure the binding post jumper plates are firmly in place on the speaker's input cup. If they are you can examine the crossover by removing the input cup, from the rear of the speaker, and look at the crossover circuit board on the other side of the input cup. Look for any burned/blackened components on the crossover. You may telephone us at 1-800-377-7655 for additional help or parts ordering information.
Regards, Ken