KSTR
Major Contributor
No, as this was a THD+N vs Power plot, not vs FrequencyI guess it is related to the bandwidth limiting in the AP-filter.
No, as this was a THD+N vs Power plot, not vs FrequencyI guess it is related to the bandwidth limiting in the AP-filter.
OK RightNo, as this was a THD+N vs Power plot, not vs Frequency
You need exactly the same voltage with RCA as with XLR...BAD IDEA with Topping PA5 if you need watts. With RCA only 2 V -> much less power with PA5.
As long as the Phases error is constant and steady this is no problem.A note as to the phase. In traditional amplifiers (class A, AB ...) the phase has never been a problem, since it was almost flat up to 20 kHz, that is why it is hardly ever specified.
Only Purifi and Orchard Audio (Starkrimson amp) know that the phase barely drops a few degrees at 20 kHz. Of the rest of class D amps, I doubt it a lot -> bad idea with tweeter ir you listen to good acoustic / electric recordings. With modern recordings, without physical instruments, no problema.
Amir is reluctant to measure the phase. If he did, we would get rid of doubts with the class D amplifiers that he reviews.
Ordered and paid Nov. 26. FedEx label created Dec. 4. Package yet to be handed to FedEx. During these times delays are the norm. Oh well.Ordered and paid 3rd December 2021, still no shipping or any message
@KSTR you seem to be very knowledgeable of audio circuits in general, I read you worked for ADAM before. Could you tell us where do you currently work? Thanks!Amps are minimum phase, so phase directly follows from frequency response.
If you want to know the approximate phase error at 20kHz (not that it matters, though), model the FR in a circuit simulator and look at the phase.
I switched sides, developing musical synthesizers/keyboards. All digital stuff (complex computer systems, actually), only little analog audio circuits involved but of course lots of ancillary analog/linear circuits of all kinds, and lots of programming (my educational background is computer engineering, besides classic EE).@KSTR you seem to be very knowledgeable of audio circuits in general, I read you worked for ADAM before. Could you tell us where do you currently work? Thanks!
If I had to wildly guess looking at your location and history I bet it's Native Instruments.I switched sides, developing musical synthesizers/keyboards. All digital stuff (complex computer systems, actually), only little analog audio circuits involved but of course lots of ancillary analog/linear circuits of all kinds, and lots of programming (my educational background is computer engineering, besides classic EE).
Audio is a hobby now (apart from occasional consulting/measurement tasks and custom contract design work).
You need exactly the same voltage with RCA as with XLR...
there is no Rule that says RCA can only be 2V
Input sensitively is 2.6V so even if your output is only 2V you loose only ~2dB.
Amps are minimum phase, so phase directly follows from frequency response.
If you want to know the approximate phase error at 20kHz (not that it matters, though), model the FR in a circuit simulator and look at the phase.
97.5-95.5 = 2dB as i said80 watts -> 97.5 dBSPL (Topping PA5, 2.6V)
50 watts -> 95.5 dBSPL (Topping PA5, 2V)
you loose only ~2dB.
search utub for "binaural". they use special dual microphone setup with "human-like" ears. it works. u-tub usess 88kBit AAC - but it still works!And you seem to believe that the captured music has the same "phase accuracy" in microphone paths. Do you have an idea how their response looks like? And have you ever analyzed the "768kHz data files" for their spectral content? So where does it end?
I ordered on November 23rd and arrived on December 8th. It was delivered by FeDex, but is currently delayed considerably due to the aftereffects of a large bargain sale in China. It takes nearly twice as many days as usual.Ordered and paid 3rd December 2021, still no shipping or any message