Hello
i build this 24 dB/Octave 2/3-Way Linkwitz from http://sound.westhost.com/project09.htm
i made it 3 way and i have changed all opamp for OPA627
it seems to be working just fine. but then today i acidently pulled the AC plug, from the filter while the amp was still on. 1 sec. later! a Bad sound! and smoke! from my new Neo3PDR
so i disconecntet the amp and mesured no DC on output when power on. but when i turn it off for 1-2 sec. 1-1.5volt DC on all output
How can i cure this??
i build this 24 dB/Octave 2/3-Way Linkwitz from http://sound.westhost.com/project09.htm
i made it 3 way and i have changed all opamp for OPA627
it seems to be working just fine. but then today i acidently pulled the AC plug, from the filter while the amp was still on. 1 sec. later! a Bad sound! and smoke! from my new Neo3PDR
so i disconecntet the amp and mesured no DC on output when power on. but when i turn it off for 1-2 sec. 1-1.5volt DC on all output
How can i cure this??
Hello
I’m back whit a new problem, worse i think.
My crossover has been working fine for a I think ½ a yeah. But just 5 minutes ago while playing music. A LOUD, VERY LOUD horrible sound, I don’t believe my speakers can get any louder than that. Very nasty sound I believe it was between 60-3000Hz. it was only in the one channel, I ran over and turned it off. When I turned I back on it was gone. What can cause this? A bad solder join? Or a bad cap? Glad the speaker id not blow.
Hope someone can help
I’m back whit a new problem, worse i think.
My crossover has been working fine for a I think ½ a yeah. But just 5 minutes ago while playing music. A LOUD, VERY LOUD horrible sound, I don’t believe my speakers can get any louder than that. Very nasty sound I believe it was between 60-3000Hz. it was only in the one channel, I ran over and turned it off. When I turned I back on it was gone. What can cause this? A bad solder join? Or a bad cap? Glad the speaker id not blow.
Hope someone can help
i meant to say ::: is the overall sound output from the amplifiers system improved in terms of quality of sound after the music signal is passed from lr 24db xover??
i have jus completed the circuit on pcb(12db/octave lr from rod elliot's site).but m scared to power it up.reason being that i didnt understand in his article that how to connect the 100nf caps near op amps on power rails.if u know please tell me.
is it like,for each opamp,take a 100nf cap,solder one leg at pin 4 and other leg at pin 8????? if its something else way then how??
hence i asked for pcb layout or pics of the built x-over
any help welcome.
i have jus completed the circuit on pcb(12db/octave lr from rod elliot's site).but m scared to power it up.reason being that i didnt understand in his article that how to connect the 100nf caps near op amps on power rails.if u know please tell me.
is it like,for each opamp,take a 100nf cap,solder one leg at pin 4 and other leg at pin 8????? if its something else way then how??
hence i asked for pcb layout or pics of the built x-over
any help welcome.
driver choice
Hi Calebay,
This may be a bit off subject, so I say sorry first. I have got the parts to build to 2-way versionof the crossover with OPA2134. But I'm hesitating on the cut off frequency. ESP suggests a cut off at 310Hz for a 2-way crossover, and this seems to be an odd choice when finding drivers to match. May I ask if yours is a 2-way or 3-way crossover, the cut off frequencies, and the drivers chosen, and the million-dollar question - is the sound much better with than without the active crossover? Oops, seems a mouthful to ask.
Cheers,
KK
Hi Calebay,
This may be a bit off subject, so I say sorry first. I have got the parts to build to 2-way versionof the crossover with OPA2134. But I'm hesitating on the cut off frequency. ESP suggests a cut off at 310Hz for a 2-way crossover, and this seems to be an odd choice when finding drivers to match. May I ask if yours is a 2-way or 3-way crossover, the cut off frequencies, and the drivers chosen, and the million-dollar question - is the sound much better with than without the active crossover? Oops, seems a mouthful to ask.
Cheers,
KK
Hi kk
Cut off at 310Hz appears to be the crossover frequency that he suggests for a 3-way. Between a bass unit and a midrange. In a normal 2 way design it will be a lot higher. But it all depends on the drivers you chose to use. What I use in my case is a Eton 11” crossed over at 150hz to a Fostex FX200 crossed over at 6000hz to a Neo3PDR. I’m happy whit the sound. I can’t compare it to passive crossover because I have only tried the active one whit these speakers.
sagarverma
I can’t post my PCB sorry it got deleted last time I reinstalled windows I have a low quality pic. but its 250kb.. how do i post pic bigger than 102400 bytes?
Cut off at 310Hz appears to be the crossover frequency that he suggests for a 3-way. Between a bass unit and a midrange. In a normal 2 way design it will be a lot higher. But it all depends on the drivers you chose to use. What I use in my case is a Eton 11” crossed over at 150hz to a Fostex FX200 crossed over at 6000hz to a Neo3PDR. I’m happy whit the sound. I can’t compare it to passive crossover because I have only tried the active one whit these speakers.
sagarverma
I can’t post my PCB sorry it got deleted last time I reinstalled windows I have a low quality pic. but its 250kb.. how do i post pic bigger than 102400 bytes?
no need .what i needed i got from others on the forum.thank u for reply.
off the track,wanna see my new bike(i have red colour).click the link
http://www.herohonda.com/karizma/
how is it(i have red one)
--------------------------------------------------------------------
thanks that diyaudio exists.
off the track,wanna see my new bike(i have red colour).click the link
http://www.herohonda.com/karizma/
how is it(i have red one)
--------------------------------------------------------------------
thanks that diyaudio exists.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.