Amplifier dude
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- Nov 25, 2021
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Can you show us the plot?Question of standpoint.
Now can you please answer my question?
PS: boXem Arthur 4215/E2 SNR 122 dB @ 100 W 4 Ohm.
Can you show us the plot?Question of standpoint.
Now can you please answer my question?
PS: boXem Arthur 4215/E2 SNR 122 dB @ 100 W 4 Ohm.
If we have a look at the spikes to the left of the 1khz signal, what do we call them, distortion or noise?
View attachment 168410
I’m not sure. I’m just a dummy who tunes my amps by ear.
I think you’re misunderstanding me. I in no way was accusing you of anything other than a good faith response. I was just slightly over exaggerating my lack of knowledge in the field. Sometimes sarcasm comes across the wrong way over the internet.No sale. I didn't accuse you of anything or dismiss anything you said. I responded in good faith to a question you raised, which I assumed was a good-faith question. So respond in good faith or else don't pose the question in the first place.
I think you’re misunderstanding me. I in no way was accusing you of anything other than a good faith response. I was just slightly over exaggerating my lack of knowledge in the field.
No problem, please continue on to the new thread I made. I shared the link a few posts back. Hopefully it will be a great learning thread for all.Understood, and appreciate your reply. And I get the frustration of feeling like one's experience is being automatically dismissed without any real consideration.
That said, I would be curious to know your thoughts on the question you posed. Thanks!
OK. Let's put my budget issues aside, and, as nice as the superfluous things like audio sense and input level adjustments are, just focus on sound.Hehe. Won't be cheaper than boXem.
I didn't realize that March had gone to the bottom end of the market. Not that long ago, our prices were quite close.
I consider the 4215/E2 to be the best option for your setup. If the pricing is not fitting your budget, I also perfectly understand that you may want to look elsewhere
<LECTURING MODE ON>Input level adjustment is also related to sound since it allows to adjust system SNR and clipping. <LECTURING MODE OFF>OK. Let's put my budget issues aside, and, as nice as the superfluous things like audio sense and input level adjustments are, just focus on sound.
OPA1612 has a quite high bias current that creates a DC offset when circulating in the input impedance. If input impedance is too high, it causes pops at startup/shutdown and a bit of distortion in the speaker. Solution is to lower the input impedance, but then the amplifier becomes harder to drive for the upfront electronics, with a risk to add distortion in the system. The Opa1656 trades a bit of noise against a much lower bias current allowing to keep high input impedance. The opamp extra noise is compensated by another design trick and at the end, both boXem buffer and EVAL1 have equivalent noise levels.Your opamp choice: I may be wrong (usually am) but are you the only brand using OPA1656? Why have you chosen that and what does it offer? I keep reading on here that the Eval version of everything is the way to go, doesn't that use the 1612?
Sounds interesting. Will have to do the business case...Also, orange is rubbish. Your amps should all be Claret & Blue with images of Declan Rice etched onto the case. You'd sell loads*
*one
Congratulations. You've made the shortlist.<LECTURING MODE ON>Input level adjustment is also related to sound since it allows to adjust system SNR and clipping. <LECTURING MODE OFF>
OPA1612 has a quite high bias current that creates a DC offset when circulating in the input impedance. If input impedance is too high, it causes pops at startup/shutdown and a bit of distortion in the speaker. Solution is to lower the input impedance, but then the amplifier becomes harder to drive for the upfront electronics, with a risk to add distortion in the system. The Opa1656 trades a bit of noise against a much lower bias current allowing to keep high input impedance. The opamp extra noise is compensated by another design trick and at the end, both boXem buffer and EVAL1 have equivalent noise levels.
Sounds interesting. Will have to do the business case...