ps was that pragmasi or eric which posted the equation post ?That was me re-posting Eric's advice to point out how it wasn't very helpful.
testing a crossover
hi guys and girls i have a
problem with my 3 way wilmslow-audio mirrage speakers , I am hoping you can help me with the problem,.
Lately my power amp went pop and i sent it away for repair,when i
received it back {repaired} it went pop again,on sending it back to
the repair technician ,he has come back to me ,and asked me to take
some ohms readings on the speakers, on testing the speakers , i run
these speakers using 2 power amps{Arcam Alpha 10s,using one for low
pass{bass} and the other for MID/HIGH,this is the amp which keeps
blowing,on the high /mid,on testing the terminal the bass{low pass}
read {left speaker]7.9 ohms ,right speaker bass 6.8ohms, But on the
left and right speakers hi/mid ,both read 0.0 ohms,{which we all know
is wrong}
BUT the strange thing is,when the blown amp was away,i only used one
power amp to run both speakers in bi wire config,and they worked
ok,all being a bit lack of bass and tightness,but still sound great.
So i stripped both speakers and checked the drivers,all 6 drivers
where good no shorts reading approx correct ohms for age,{Speakers
disconnected from x over}.can any one help with this,i would be so much in debt.
kind regards Mark
problem with my 3 way wilmslow-audio mirrage speakers , I am hoping you can help me with the problem,.
Lately my power amp went pop and i sent it away for repair,when i
received it back {repaired} it went pop again,on sending it back to
the repair technician ,he has come back to me ,and asked me to take
some ohms readings on the speakers, on testing the speakers , i run
these speakers using 2 power amps{Arcam Alpha 10s,using one for low
pass{bass} and the other for MID/HIGH,this is the amp which keeps
blowing,on the high /mid,on testing the terminal the bass{low pass}
read {left speaker]7.9 ohms ,right speaker bass 6.8ohms, But on the
left and right speakers hi/mid ,both read 0.0 ohms,{which we all know
is wrong}
BUT the strange thing is,when the blown amp was away,i only used one
power amp to run both speakers in bi wire config,and they worked
ok,all being a bit lack of bass and tightness,but still sound great.
So i stripped both speakers and checked the drivers,all 6 drivers
where good no shorts reading approx correct ohms for age,{Speakers
disconnected from x over}.can any one help with this,i would be so much in debt.
kind regards Mark
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- 119 posts total
Stop, I would not strip any parts off either board. The data, answers to my questions, looked promising. You’ve already done a lot of visual inspection and testing. The most recent pictures, the cap with the blue circle around it, what is that? Suspect bad part? What is the printed value of the cap including the voltage rating? |
I don’t know it’s can be of any help, you can find the xover schematic here: https://ucarecdn.audiogon.com/a89e98dd-d4a0-4acf-9f74-934683ea9b70/-/autorotate/yes/ |
@likklegerry- re: Your first post on this page: "Diode test on mid/high -OL when reversed is flashes 2.2xx,then goes to OL every time i reverse leads it flashes something {2.2xx}not sure its voltage,it doesnt tell me that" Only here to address that question, as I didn't notice any other answer (just FYI/fun facts). A non/bipolar cap, when presented with DC, will charge in one direction. Reverse the polarity and it will discharge and charge in the opposite direction. That's what your DMM is reading, for that brief instant. As an experiment: Connect a non/bipolar cap in series with a speaker. Don't use a tweeter, unless it's expendable. Touch a 9V battery's + post to the open lead of the cap and -, to the open speaker terminal. Hold it there, for a few seconds. Longer: the greater the cap's values Reverse those connections and you'll hear a *POP, every time. *The cap, discharging |
- 119 posts total