2. tech-talk
  3. 136605-19492

Blown speaker or crossover opinion

I overdrove a classe ca-101 to the point of tripping the rail fuses in my classe amp.  I had the system maxed out with my setup and left the room the next track came on the cd player which was of higher quality and loudness and pushed things to high before I could hit stop. Ignored this problem for two years not playing this stereo.
decided to look into repairs a couple of weeks ago and realize vooth classe componets and energy speakers are on the verge of being out of business.Yet I love the sound of this setup. I got the schemetics on the classe ca=101 and realized the internal railfuses were blown got the fuses to replace them and now both classe ca-101 amps are fine tried with lesser speakers. my classe cp-35 preamp is also fine hooked to a old adcom 5503 from my home theater setup. However the energy Rc-70  mid woofers do not move at all . This speaker has a  treble a midrange
and two bass woofers with the top bass woofer being connected  to the midrange to smooth out the bass .
All speackers work well excep the mids Yet when I put my hands to the cones they feel perfect,  Just like all the othe lower bass drives Could this be a crossover problem or blown woofer

Thanks in Advance Tribze
tribze
2 responses Add your response
glennewdick's avatar
glennewdick
1,658 posts
 

you will need to take the driver out and put a meter across it to see if the voice coil is blown. if that is ok then look to the cross over. also as I don't know anything about your speakers a shot in the dark here is do they have a fuse in them?

most speakers will blow the drive well before the cross overs.....unfortunately.

oh if your not technically inclined have a shop do this. but if you can remove the speaker wires. unscrew the driver. if able unplug one of the wires going to the driver and using the ohm setting on your meter put the wires across the two driver connections and see if you have continuity. some meters will beep if ok or you will need to read the amount of resistance. huge number ( infinity) is bad that means its an open circuit. you should see minimal  resistance as the coil wire should have some. so low number good really high of infinity bad. beep good no beep bad.

rodman99999
6,128 posts
 
@tribze- Don’t get confused. If the speaker is open, you won’t have any reading(or beep), at all, on any ohmmeter. That’s the same as not touching your probes to anything. Most drivers have their nominal impedance, marked on the magnet structure. If there’s continuity, with a good driver, your reading should be close to that figure. If it’s substantially lower(and beeping, if you meter’s so equipped), the voice-coil’s probably burnt and shorted. Given you’re not getting any sound at all, that’s probably not the case. Generally speaking, if the enameling of the voice-coil wire is burnt, without opening up completely, the driver will make some terrible rattling noises(when trying to play music, that is).
Log in to respond
More to discover
80x80
Focal Chora
80x80
B&W (Bowers & Wilkins) 801D4
80x80
Ayon Audio S-10IIxs