Epic CF-2 Help Needed

[doobiesd]

I have a set of CF-2 that have been sitting dormant for years, and were working fine when I unplugged them. Both speakers have a crackle now. I am thinking the crossovers are shot. I can't find any replacements online. Does anyone have any suggestions?  Thank you!

[billybob]

Yes, would think not the crossovers as much as possible corrosion at the speaker connections.

BTW, has what you are powering with them been setting also?

If so, likely hearing static from speakers via the volume, balance, etc. Would work them manually and deoxidize them with contact cleaner.

Welcome!

Edited December 8, 2022 by billybob

[doobiesd]

I will try and clean all of the connections and try again. What do you recommend?  

 

Regarding the power source, I have 2 different Yamaha AVRs I tried. The newer AVR has been powering my Zone 2 and 3 in my house. I pulled it out to verify it wasn't my first avr.

[billybob]

Answer above, contact spray.

[doobiesd]

Thanks I ordered some and will try this weekend, Ill report back.

[MicroMara]

34 minutes ago, doobiesd said:

I have a set of CF-2 that have been sitting dormant for years, and were working fine when I unplugged them. Both speakers have a crackle now. I am thinking the crossovers are shot. I can't find any replacements online. Does anyone have any suggestions?  Thank you!

Well they look good so far , no burned surfaces or something similar, don´t think that they´re the problem. The crackles ? coming from the woofers or the horn driver ? If the woofer causing the crackles..maybe the cones got a problem . Does the crackles appear even in lower or higher volumes  ? 

[carlthess40]

What’s your location? Maybe if you could find someone close to you . This way you could test all of the crossover parts. I’m in Deltona Fl and have all the tools to test all of the components of speakers, everything from the drivers down to the wiring

[DeanG Crossovers]

Wiggle/reseat the disconnects going to the drivers.

[doobiesd]

I think I figured it out, with a combination everyone advise. The right speaker I reconnected each of the drives, but I think the issue was a weak connection on the rear terminal, with the nut. 

 

The left speaker, the bottom woofer is blown. Visibly it looks good, but it is distorting. Any suggestions on repair or replacement? Where do you recommend to buy a replacement?

 

One a side note, my matching sub has a consistent low hum. I have tried different outlets, its plugged directly into the wall. I have tried the ground delete wall adapter....

 

Thanks again!

[MicroMara]

22 minutes ago, doobiesd said:

I think I figured it out, with a combination everyone advise. The right speaker I reconnected each of the drives, but I think the issue was a weak connection on the rear terminal, with the nut. 

 

The left speaker, the bottom woofer is blown. Visibly it looks good, but it is distorting. Any suggestions on repair or replacement? Where do you recommend to buy a replacement?

 

One a side note, my matching sub has a consistent low hum. I have tried different outlets, its plugged directly into the wall. I have tried the ground delete wall adapter....

 

Thanks again!

No idea where to get them , look for WOOFER K-1029-KN 8" (20.32cm) Poly carbon graphite cones , maybe ebay us or somewhere else

[doobiesd]

1 minute ago, MicroMara said:

No idea where to get them , look for WOOFER K-1029-KN 8" (20.32cm) Poly carbon graphite cones , maybe ebay us or somewhere else

Tried that already, at least i know the problem know. Thanks!

[avguytx]

Do you have a DMM that you can check resistance of the "bad" woofer against the good woofer? Also, hook up the woofer straight to the speaker wires (out of the cabinet) and see if you can pin point the distortion you're hearing. 

[avguytx]

Again....how much troubleshooting have you done with the woofer that is "bad"?  

[OO1]

On 12/8/2022 at 2:15 PM, doobiesd said:

 

 

The left speaker, the bottom woofer is blown. Visibly it looks good, but it is distorting. 

we have to determine what's  wrong with the woofer , 

 

1st step get an Ohmmeter , switch the dial to Ohms .....test both woofers .....what are the results for the  good and the bad woofer ?