- Thread Starter
- #21
That is left and right channel both with Jitterbug. The previous chart is without.
That is left and right channel both with Jitterbug. The previous chart is without.
Snake oil cable vendors make a product that does nothing, surprise surprise.
I didn't know what they targeted with induction coil, hi Ohm's resistors are useful when there is a bad USB cable or port in between for both current stabilisation & improved grounding but that's the oldest trick in the book. A row of capacitors when placed on main dac amp bord for stabilisation of the current feed to the DAC & amp chip will help there & will also act as self lo filter but effect is much better if they are placed there then somewhere else. Manufacturers of modern DAC, amp chips state their is no need for this still never the less effect will be there if placed so every normal equipment manufacturer will place them there. Audio Quest ain't among those manufacturers and you won't found voltage regulation row of capacitors on their DragonFly's which I would call cheap bastards design. I do tend to use quality OTG adopter (micro to A port) with high impedance tiristor to save me a trouble with non standard cable's, bad quality one's & ports but mostly to extend the life expectations of portable dac USB input ports. Those cost 2~3$ & you also get amazing grace that you can use regular data cable or even coiled plane USB cable. More than 6~7$ for this is a rip off!What is a crime is how few components are in there:
View attachment 41221
A couple of capacitors, inductors and chokes and they charge $59? The total manufacturing cost must be under $10.
Why anyone is at ease putting aside common sense to think the DAC designer couldn't include this bit of filtering is beyond me.
Do you think they tried to develop a simple filter that slightly helped with 8 khz packet noise. Sure their promises are anywhere from way over the top to outright lies, but maybe this one thing is something they sort of did.
But the jitterbug on the power brings us 15dB improvement at 20kHz (of course I can't hear that but secretly still can because high res sounds better so I must be able to perceive 20kHz up to 100kHz)
And we see a massive 10dB improvement in packet noise (around 8kHz)
10dB ... that's very audible as it is a doubling of loudness so yeah ... it must be audible when I play at 170dB SPL !
At least you can attest to it's durability!As if to get revenge, my dog got a hold of it and chewed up the case but magically, the circuit itself survived!
And now, you can hear how crap it sounds without the Jitterbug. Let's plug it back. Now this is pretty obvious how much the dynamic increases and the soundstage opens up. What? You don't hear that? Must be something wrong with your ears, folks... It does sound better...because I told you so!
It was lauded by WhatHiFi and given 5*, so I decided to give it a try.
You have to test it with at least 100 DACs before saying it does nothing!
Those cost 2~3$ & you also get amazing grace that you can use regular data cable or even coiled plane USB cable. More than 6~7$ for this is a rip off!
On the other side don't be so harsh to it, after all it whose a yummy chowing toy for your dog who by the way developed it's critics taste very well.
Best regards.
Has anyone invented the USB Cooker yet?Maybe you should way a few hours of burn-in?
That could be exactly the point. I wonder if the logically challenged who claim that it works are in fact using DACs that are so bad that it does make a difference? A similar situation might exist with amplifiers and power cables...What is a crime is how few components are in there:
View attachment 41221
A couple of capacitors, inductors and chokes and they charge $59? The total manufacturing cost must be under $10.
Why anyone is at ease putting aside common sense to think the DAC designer couldn't include this bit of filtering is beyond me.