Surprised no one has mentioned phase of the harmonics, relative to the fundamental. Amplitude of the harmonics analysis doesnt care what the phase is; it's just a level. Perhaps your ears do. Or can tell.
I'm not a good enough designer in either the electrical or mechanical realm to be able to manipulate the phase of any harmonics that some component impresses upon an audio signal passing through.
Unsure I could do it even with DSP invoking pure mathematics on an audio signal.
I'm not a good enough designer in either the electrical or mechanical realm to be able to manipulate the phase of any harmonics that some component impresses upon an audio signal passing through.
Unsure I could do it even with DSP invoking pure mathematics on an audio signal.
No, this is with Sound Lab ESL panels. Had a visitor recently, a friend of Nelson Pass, and good diy designer. Guy had good ears and a lot of experience. Said he couldn't believe there wasn't a tube anywhere in the system. Said he didn't know such high quality sound was even attainable. Visit mentioned briefly in another thread: https://www.diyaudio.com/community/threads/schade-common-gate-scg-preamp.380487/post-7236564
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Does it? Certainly a higher output impedance amplifier would affect the woofer Q enough to make a noticeable difference. But crossover points? I can't remember that happening in my builds and I can't get it to happen in XSim. Can you demonstrate this?
Phase is omitted from typical audio FFT analysis, which is usually magnitude only. If you don't see it then its like it doesn't exist. WYSIATI.
I have both simulated and measured the effects.
Typically, the tweeter crossover -3dB point is lowered and the woofer -3dB point is raised. This results in an emphasis at the crossover point (+1dB with 0.4 ohms on my MG1.6s). The crossover frequency remains unchanged.
Two decades ago on another board, some members swore that Magnepans sounded better with tube amplification. I traced the cause to output impedances of a few tenths of an ohm shifting the crossover -3dB points.
Ed
This simple & minimal AB1 two stage A-class power amp is known to many people as
2A3 SET killer , his efficiency is very low , produce just few Watts but sounds just OK in combination with high efficiency 16-Ohm LS , it is designed by Alexander Bokarev (Russia) ,the man with decades long great experience as electronics designer .Attachments
cumbb
Think that for some good reason Alexander B. uses those two coupling capacitor (C3&C4) in 1:10 value ratio ,
bigger one connected to ground negative line , and smaller one connected to positive B+ line .
Think that for some good reason Alexander B. uses those two coupling capacitor (C3&C4) in 1:10 value ratio ,
bigger one connected to ground negative line , and smaller one connected to positive B+ line .
Let's say, one created a servo that chased whatever DC voltage is at the drain of the above circuit. Maybe with a 1Hz bandwidth.
Followed by a power stage of some sort; class AB, Class D, whatever; it's effectively a regulated power supply output. Then connect the speaker from the drain to the output of that circuit, sitting at the same quiescent voltage as the drain.
Would the sound of the amp change, because C3 / C4 are no longer conducting AC current?
Followed by a power stage of some sort; class AB, Class D, whatever; it's effectively a regulated power supply output. Then connect the speaker from the drain to the output of that circuit, sitting at the same quiescent voltage as the drain.
Would the sound of the amp change, because C3 / C4 are no longer conducting AC current?
Nobody mentioned the memory effect of semiconductors, and also some capacitors, even resistors. Tubes don't have this memory effect, and I belive this is the reson of their more pleasant sound (in general).
There's something to that.
And the resonance behavior of the materials of the parts also influences the sound considerably.
And the resonance behavior of the materials of the parts also influences the sound considerably.
In the real world , (not in audiophile circles). I can hear my neighbor's cheap Walmart speakers clip all day.
The poor clip their cheap OEM systems regularly. I've clipped my 35W satellites (3886 chip) .. not bad unless you really overdrive it.
I can't clip my sub with 150W amp , but most likely would not hear it. Port turbulence and woofer THD are more of a factor than the amp.
I have heard (more pleasing) sound from symmetrical designs running an output triple OPS . Especially near clipping. PSRR and damping might
be the factor here. Fancy wires and "audiophile caps" - NOPE ... short of just having the right parts for reliability and a good design.
Or the so called horrible "sound bars"
which I was recently giving for free.
Expecting the dreadful sound so acclaimed.
Ironically it actually sound pretty good, and the wannabe
little sub does rather well.
All its tubeless , bluetooth, Class D blasphemy
Streaming from my phone
That one Duke Ellington track.
I dont have a copy of. Streamed away and still made me
cry like it always does.
Speech in movies lacks detail for sure.
Music works well.
Great thing about low grade systems, even a change to a
"mid grade" HiFi system. It makes it, a more... uplifting experience.
When people hear such detail in even a average hifi system for the
first time
which I was recently giving for free.
Expecting the dreadful sound so acclaimed.
Ironically it actually sound pretty good, and the wannabe
little sub does rather well.
All its tubeless , bluetooth, Class D blasphemy
Streaming from my phone
That one Duke Ellington track.
I dont have a copy of. Streamed away and still made me
cry like it always does.
Speech in movies lacks detail for sure.
Music works well.
Great thing about low grade systems, even a change to a
"mid grade" HiFi system. It makes it, a more... uplifting experience.
When people hear such detail in even a average hifi system for the
first time
Class AB push-pull have bad sound .... what BS. Bad designs have bad sound. oscillations, X-over distortion , cheap PS's.
Someone mentioned Phase. Yes , I'm designing a variable phase control for my new sub. VERY important to keep whatever phase shift
I select between 25-100hz consistent. Sharp cutoff above 100hz , where any op-amp filter will exhibit unacceptable shift,
Someone mentioned Phase. Yes , I'm designing a variable phase control for my new sub. VERY important to keep whatever phase shift
I select between 25-100hz consistent. Sharp cutoff above 100hz , where any op-amp filter will exhibit unacceptable shift,
I've been doing the experiments for nearly sixty years playing the organ. A 4' diapason stop adds sweetness: this is 2H (lots of it). A 2' adds brilliance: this is 4H. A 2-2/3' ads nasal it's: this is 3H, and only used when soloing. And so on. This is certainly received wisdom, all the way back to Bach and beyond.