I just looked at all of your crossover photos. Don't take the following comments the wrong way, but this is my honest opinion. You should take those crossovers out and tri-amp with an active electronic crossover, please. You will truly be amazed at the improvement in sound you will get. Those are pretty cheap crossovers as the inductors are wound on ferrite and should be "air wound" on bobbins. The wire they are using for the inductors is Way to small and likely sucking allot of power from the drivers. This was a cost cutting decision when they were designed. No matter what you decide, I will help you get your speakers up and running again, bi-amped or tri-amped, whatever you decide. I'm going to take a close look at the measurements you posted the other day and all the pictures again. Will come back with questions and probably additional tests to perform. Did you ever measure the DC voltage at the amplifiers outputs with nothing connected and no signal input? Did you get the damaged amp back repaired yet?
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
- ...
- 119 posts total
| Post removed |
The reason why the speakers work with a single amp and not when bi-amped is because the crossover is using different sets of inductors and capacitors. When the speakers are bi-amped you are using one set of inductors and capacitors, those are the caps or wiring that has the problem. The inductors are not the issue in my opinion. The wiring is suspect, if the caps test good. Think about what I've said thus far and tomorrow we'll get into the testing if you insist on repairing these crossovers. At this point, I don't think it's necessary for you to measure the DC at the amplifier outputs although that is always good info. |
ill try draw a schem.but its difficult, but ill do my best@ likklegerry, If you can print-out the crossover pcb photo and add all the component position on it with wiring and post the picture, maybe we can figure out the schematic and go from there. https://www.wilmslowaudio.co.uk/ekmps/shops/wilmslow/images/crossover-pcb-452-p.jpg an example: https://ibb.co/3zyQRyG |
- 119 posts total