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View Full Version : what's wrong with 2121 or 4343?


pyonc
05-11-2011, 01:14 PM
Hi,

I need your diagnosis of what just went wrong with one of the mid-range 2121s in my 4343. While the 2121 on my left one sounds okay, I hear no sound from this 2121 on my right speaker, and whenever I turn off the amplifier, I hear some sort of "frying" noise from the 2121 in question. Do you think its voice coil has been burnt out? :blink:

Actually I've been listening to 4343 in biamp mode, with Crown DC300 hooked to 2231A woofers, and 2121s to Adcom 535 amp. This 2121 problem happened after I replaced the existing 2121 with another one that I purchased from ebay the other day. When I compared the sounds from 2121s from both speakers, I found the sound from the replaced one weaker than the other one, so I turned off the amps, starting from the Crown. When I turned off the Adcom, I heard this "frying" noise from the replaced 2121. Was it possibly caused by the Adcom amp or even Crown? I have had no problem with that up to now. The Xover is Ashly XR1001. Thanks for your help in advance.
Robh3606
05-11-2011, 01:23 PM
You could have a noisey potentiometer in the Ashly. I had a volume in one of my actives essentially shut off my midrange 2123. I turned it a couple of times and it was good as new

Rob:)
grumpy
05-11-2011, 02:17 PM
you tried swapping L/R speaker leads on the adcom output already?
BMWCCA
05-11-2011, 03:15 PM
This 2121 problem happened after I replaced the existing 2121 with another one that I purchased from ebay the other day.What was the problem with the original one? Were you using the same amps when that problem occurred?:dont-know:
pyonc
05-12-2011, 05:09 AM
Thanks to you all for your kind replies.

After checking the system here and there for some time,
I finally found out the problem was caused by my wrong wiring inside.
I think I got messed up while replacing the existing 2121 with another one
Anyway I fixed it right, and now everything is back to normal.

By the way, an unusually high hum noise was heard when I turned on the CD player, but when I replaced the AudioQeust interconnect cables with another pair, it just disappeared, to my relief. :)