Any answer to my question, so I must ask differently : is here anybody, who listen differences by reproduction " in phase " and " outphase " ?
Because they have modular systems and need to ensure phase accuracy.
This has nothing to do with an inverting or noninverting stage inside! I remember good studio equipment with cathode grounded tubes, eg. inverting stages.
Then, you should change connection of your speakers, Peter!
I think, you prefer the sound of the noninverting gainclone than the one of the inverting.
Did you try a inverting chip with t-network for feedback, Peter?
Franz
Another T
R1 = 20.8K
R2 = 9.9K
R3 = 110R
R4 = 10K
Offset = 9mv and 6mv.
Sheldon
Oh, this is on a LM3876.
R1 = 20.8K
R2 = 9.9K
R3 = 110R
R4 = 10K
Offset = 9mv and 6mv.
Sheldon
Oh, this is on a LM3876.
Franz G said:
Then, you should change connection of your speakers, Peter!
I think, you prefer the sound of the noninverting gainclone than the one of the noninverting.
Did you try a inverting chip with t-network for feedback, Peter?
The speaker connection is now in phase. I had a short period of prefering the other way, but it's gone now.
Note that some recordings still sound better in reversed phase, depending how they were made.
I still didn't try t-network.
Your speaker connection? The red cable to the red posting?
You really must be joking, Peter!
Franz
Sorry, maybe I dont understand you, Peter:
Lets talk about a mono amp: do you remark a difference, when you connect the speaker one way or another?
If yes, you must be joking or have very strange speakers.
Sorry, we are going ot
Franz
Lets talk about a mono amp: do you remark a difference, when you connect the speaker one way or another?
If yes, you must be joking or have very strange speakers.
Sorry, we are going ot
Franz
What is about my speakers that seem strange to you? I don't mind going OT, it's not my thread😉
And yes, I can detect out of phase connection, being it at the amp output or pre out or source out.
And yes, I can detect out of phase connection, being it at the amp output or pre out or source out.
Of course, stereo systems and surround systems: all channels have to be in phase.
If not, I can remark it to 🙂
Franz
Edit:
Of course, when you dont have symmetrical cabling between the pre and amp: who would connect the ground of the pre to the signal of the amp? You can see such a problem clearly at the scope! This is something completely different than connecting speakers.
Franz G said:
My preamp has polarity switch (with remote) and my DAC actually inverts polarity, that's why I'm adjusting for that with cable reversal on the amp.
So you connect the ground of an preceding device to the signal path from the amp?
You should attach a scope
and better don't tell us the results, as it is really OT here. We speak about the high-end topic t-network for feedback, not bricolage.Please, Peter, stay out of this thread (or try the t-network)!
Franz
Franz G said:
So you connect the ground of an preceding device to the signal path from the amp?
You should attach a scope
Please, Peter!
Franz
I think you are confusing things here.
I'm connecting black speaker cable to red binding post. The DAC is connected in a usual way: signal and ground are not reversed.
Franz G said:
If you want me to stay out, why are you asking me all those confusing questions?
I think it might be rude, if I didn't provide you with the answer, wouldn't it?
O.K. back to the beginning.
Be sure to connect both channels the same way. Full stop.
Again, Peter, stop this topic here. It has nothing to do with t-network for feedback.
Franz
Franz G said:
Well, it seems to me that you are suggesting that I'm not connecting my cables in a proper way.
Are you satisfied with my explanation? Full stop.
PS: You can always ask moderators to remove unrelated posts.
Franz G said:
I'm still not sure why you say I'm joking, BTW.
Is that some sort of your sense of humor? Please explain.
If you don't want to bring this thread OT anymore, you can always e-mail me.
Re: Re: Re: Re: Some changes...
I was saying regulate the PSU of the amp.
I don't feel any lack of bass.
It really kicks, and I have difficult speakers.
Inverting LM3886 with regulated PSU + OPA627 biased to class-A as input buffer.
Joe, are you saying that the lack of bass is because of the valve buffer?
Joe Rasmussen said:
I was saying regulate the PSU of the amp.
I don't feel any lack of bass.
It really kicks, and I have difficult speakers.
Inverting LM3886 with regulated PSU + OPA627 biased to class-A as input buffer.
Joe, are you saying that the lack of bass is because of the valve buffer?
Franz, in studios is standard to " hold " phase from reason to easy control, but main reason is different. Human brain is accustomed, that every strokes are " incoming ", not " outcoming " and if pfase is reversed, brain take it as strange and unnatural sound. When drumer " kiks " big drum, which is pressure gradient in your ear, rise or fall ? If you reverse phase, you will have feeling, that you are beside the drum, not in front off them. Have you changed speaker terminals or not ? 😎
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