This made me chuckle :)
https://www.youtube.com/watch?v=NZGM55ZqZeM
HB
2 x Duet, 2 x Radio, Touch & Receiver with iPeng 8 served by Synology
1815+ and LMS 7.9 (Repack by pinkdot)
HeadBanger's Profile:
Wombat wrote:
Again, i think it is simply the absense of any capacitor at the output.
The 1000yF are for the electronics, i doubt they are in the signal
path.
I didn't look around much but this review lists no capacitor in the
signal path as feature.
utgg wrote:
Maybe just showing the DC decay resulting from AC/capacitively coupled
output. I.e. the impulse injects a very small amount of DC which decays
over a few ms - perhaps no further overshoot/ringing involved after the
initial 'rebound'. Should be visible with a lot more gain on the
Archimago wrote:
Excellent work utgg! Indeed it looks like as you said, a D/C offset
which decays over at least 40ms. Here's a zoomed in look at the tracing
of the impuse
Result of those big 1000uF capacitors seen in the 'hardware teardown'
Archimago wrote:
Just thought this spectral frequency plot looked interesting for the
PonoPlayer!
Lots of high-frequency gets through of course but not the usual Nyquist
ringing. Linear with no phase shift in the higher frequencies. An
interesting low frequency afterimage in the plot.
Archimago wrote:
Just thought this spectral frequency plot looked interesting for the
PonoPlayer!
Lots of high-frequency gets through of course but not the usual Nyquist
ringing. Linear with no phase shift in the higher frequencies. An
interesting low frequency afterimage in the plot.
Archimago wrote:
Just thought this spectral frequency plot looked interesting for the
PonoPlayer!
Lots of high-frequency gets through of course but not the usual Nyquist
ringing. Linear with no phase shift in the higher frequencies. An
interesting low frequency afterimage in the plot.
Mnyb wrote:
Arny yes it has apodizing its developed by ayre thtas their thing for
the moment.
Also notice archimogos measurment that shows a treble rolloff within the
audible range . So ofcourse it may sound different to some users :)
different=better for some audiophiles . Some recordings
Arny yes it has apodizing its developed by ayre thtas their thing for
the moment.
Also notice archimogos measurment that shows a treble rolloff within the
audible range . So ofcourse it may sound different to some users :)
different=better for some audiophiles . Some recordings may benefit ,but
I gues if it was the typical Meridian filter attempt we had no alias.
Would be interesting to show the sweep picture used on the famous src
page.
For the low frequency in the pic i second it may be DC like utgg
suggest. Is the output advertised capacitorless?
Transporter (modded) - RG142 -
Just thought this spectral frequency plot looked interesting for the
PonoPlayer!
Lots of high-frequency gets through of course but not the usual Nyquist
ringing. Linear with no phase shift in the higher frequencies. An
interesting low frequency afterimage in the plot. (Not sure how else
to call
arnyk wrote:
one question is whether or not the pono's rather obvious treble roll-off
is audible:
The Pono (white line) is about 0.5 dB down @10 KHz and about 5 dB down
at @20 KHz. Severe enough to perhaps even be audible.
What is unknown from these measurements is the corresponding
arnyk wrote:
What is unknown from these measurements is the corresponding phase
response and its corresponding effects on transient response.
Yes, good point Arny. I'll see if I can get the phase graphs up...
Archimago's Musings: (archimago.blogspot.com) A 'more objective'
audiophile
arnyk wrote:
one question is whether or not the pono's rather obvious treble roll-off
is audible:
18530
The Pono (white line) is about 0.5 dB down @10 KHz and about 5 dB down
at @20 KHz. Severe enough to perhaps even be audible.
What is unknown from these measurements is the
Wombat wrote:
So they obviously use a slow roll-off together with minimum phase.
In terms of modern trends and fashions, I agree that minimum phase and
slow roll offs come together,
but if I remember what I learned in filter design class, not so much.
For example any Butterworth filter is
Archimago wrote:
Anachronistic devices are everywhere in the audiophile world of
course... Tubes (or tubes in digital players), 'modern' turntables,
'new' LP media, and a reintroduction to DAP's at a time when smartphones
are ubiquitous.
I think the term parachronistic may be more in tune
Parachronistic :) thats it , i know a some folks that ridee motorcycles
. In the 50 and 60 and possible early 70 these where designed as actual
vehicles nowadays it's all about brand recognition and image and look
and feel for many of them . Not a practical thing to commute with .
Mnyb wrote:
Yes imho there is a risk that this is audible the only way to get proper
hf response with this player is to use hirez material or maybe upsample
your cd stuff :) what is the hf drop at 13khz or 15khz ? That 20k is
gone down -5dB can bother young audiophiles but thats does not
Archimago wrote:
You're welcome! It was a fun night of measuring and thinking about what
I wanted to say about this piece of equipment after playing with it for
the last couple months off and on.
I think the Pono saga has been a fascinating one to watch and comment on
over the last few
Thanks Archimago!
What I liked most about your write up was that you very clearly
differentiated between the hardware and all the surrounding hype/BS. In
essence: as a piece hardware the Pono Player delivers as promised,
however when the hype/BS about hi-rez audio is removed the question that
ralphpnj wrote:
Thanks Archimago!
What I liked most about your write up was that you very clearly
differentiated between the hardware and all the surrounding hype/BS. In
essence: as a piece hardware the Pono Player delivers as promised,
however when the hype/BS about hi-rez audio is
ralphpnj wrote:
Thanks Archimago!
What I liked most about your write up was that you very clearly
differentiated between the hardware and all the surrounding hype/BS. In
essence: as a piece hardware the Pono Player delivers as promised,
however when the hype/BS about hi-rez audio is
Boys. Just got done with the PonoPlayer write-up...
Having just completed the digital filters test, I think what Ayre is
doing with the filters is pretty funky :-).
Anyhow, some measurements and opinions...
http://archimago.blogspot.com/2015/08/measurements-ponoplayer-another-mans.html
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