sir apex and to all diyers good day ask for the nsl-32 replacement how can i connect the 47k and led can u share the circuit connection.... thanks regards
Test on Op-Amps
Recently, i played with op-amps. I popped up my amplifier's hood, and started to switch between the following op-amps: NE5532 (Texas/Philips), OPA2134, TL072, TL082, LM358. The OPA2134 was the most expensive (Burr-Brown) but as i tested them, (listened to each one about half hour) i didn't hear too much difference between them. The OPA2134 had a bit clearer bass than the others. But what was interesting, is that 2 NE5532 can sound different. One of them was a TI model, the other one was Philips. The Philips sounded way better (for me) than the other. I don't want to start an argument here on op-amps, so that's why i wrote FOR ME. Everyone should do his/her own tests, and decide wich one sounds better for him/her.
BTW, the amp works great, under 4 ohm load and after running for 8 hours continously, it is only warm. And also has excellent sound, even if it is nearly at clipping. (Hope you understand what i tried to write)
Recently, i played with op-amps. I popped up my amplifier's hood, and started to switch between the following op-amps: NE5532 (Texas/Philips), OPA2134, TL072, TL082, LM358. The OPA2134 was the most expensive (Burr-Brown) but as i tested them, (listened to each one about half hour) i didn't hear too much difference between them. The OPA2134 had a bit clearer bass than the others. But what was interesting, is that 2 NE5532 can sound different. One of them was a TI model, the other one was Philips. The Philips sounded way better (for me) than the other. I don't want to start an argument here on op-amps, so that's why i wrote FOR ME. Everyone should do his/her own tests, and decide wich one sounds better for him/her.
BTW, the amp works great, under 4 ohm load and after running for 8 hours continously, it is only warm. And also has excellent sound, even if it is nearly at clipping. (Hope you understand what i tried to write)
^thanks, now i understand your comment......
re: op-amps, i think the priority for PA amps is power and reliability.....once the music starts playing and playing loud, i doubt any one will care about which op-amp is on board....🙂
re: op-amps, i think the priority for PA amps is power and reliability.....once the music starts playing and playing loud, i doubt any one will care about which op-amp is on board....🙂
I partially agree with you, but i am such a freak, i want the music to be both loud and clear. In every aspect.
As many of us (DIY-ers) i also can not afford a KV2 Audio system. Nor a QSC. Till then, i try to build my own toys that sound acceptable for me.
And try to build as good as i can.
@APEXAUDIO, ive been trying to view this design before but i hadn't a priveledge,now that i can see the diagram probably in next month i will build this stuff for my mobile sound system and test it for my PA subs.thanks for sharing...Mabuhay ka!!!!
Oh i,m sure as i can see in your photos on facebook,i cant wait to hear what it has for my PA subs...thanks BiBoi...my great influence in building such circuit.
and is now on going in the philippines...
this is really a great amp that everyone would love to build...
regards,
ees...
Capacitor working voltage
Hello Sir Apex,
I want to build your B500 amplifier. May I know the exact working voltage of capacitors C2,C5,100pF and 10nF. please help me.
thanks
Hello Sir Apex,
I want to build your B500 amplifier. May I know the exact working voltage of capacitors C2,C5,100pF and 10nF. please help me.
thanks