Once forgot or misunderstanding what teachers told you, can remind yourself by seeing array of cars infront of signal light. Speed of ligh (R, G signal) is that speed of electromagnetic transmission. Cars speed is not light speed. Dont waste you brain think that flow of cars fast as green light...

He still thinking once the red turn to green, those cars travel at 747's speed just because he see all cars move simulanously. If those are not cars but snail (smart snail understand traffic light signal), he may think theres no electricity because snail is too slow

You checked your health recently?? You ask an electron inside accelerator??

The link in post #2: did they pull out the fuse then shortened it? I think the fuse can blury the contrast among cables. Power cable store electron that feed to the amp but a fuse is between them. Like you watching after a small gate then count how many people goes through it in certain amount...

I use a Furutech for powering hdvd800 headamp and really hear how it changes the output from hd800s drivers. Even a very short IC cable one pure silver stranded and one coper silver platted has at least, difference in bass range: kicking harder and punchy with silver, while coper with silver...

I try to feed ultrasonic (mean sound pressure is more than zero with above 20k) to Ru digitally then connect output of Ru6 to Shure1500 amp. The indication bar of the amp blinks -> Ru6 can out put more than 20k. On the other hand, I force R6 to work at 44.1k then I see no blink of indicator bar...

I did similar way, using input select button that hdvd800 and stax007tA have. I also use a switch box (all internal part bypass for minimal affect signal)... Or sometimes I compare listening w/o those support, use short memory by manually change the source. With some tracks, I even like the...

From Cayin: I understand it does not mean beyond 20k is impossible

Today I 1st time curious if Ru6 can produce ultrasonic, example 25kHz properly. Result: not sure it can or cannot (I have no criteria to evaluate). Noise heard clear as you listen to a average dynamic track by a typical headphones at volume lvl 4/100, L gain, 4.4 jack. It should be completely...

it's more about recording in pursuit of avoiding affect of low pass filter. Filter doesnt cut off really well at the right Nyquist frequency. To use 44.1 engineers have small margin to cut point, but still not perfection. With 96 or 88 it is ensure to cut after 20Khz and if, any unwant...

Delete. Duplicated.

Delete duplicated

Delete duplicated

Do you ever think reverse? Do you heard your device reproduce sounds with many audible flaws? I know the way and do to mine. I do love playing 44.1 what ever the tracks are (88, 96,384...etc) since I audit the noise. 44.1 & dither =the best. I said above, not just relate a cheap dongle(ah not...

You can peel off that label from other stuff then stick on Ru6 for peace of mind 😅. I dont see any ads that Ru6 with hires label. You may not mistake ordering. Remember to not make a mistake blow your ear with your IEM by a accidentally, it produce more than 4.2V output max capability (more than...

Thanks. The importance is Cayin true to their customer: no hires label, statement frequency 20-20k +-0.5dB. Myself I never care hires hype

With roll off -4.5dB 🤣🤣🤣

Heard or not heard the difference depending condition and individual but we may all understand: Relate to noise catching will be amply by a scale so should not use relatively low volume. Relate to output quality (from dap), more volume level got more distortion. Manufactures usually show audio...

This is top output 4.31V More than actual of SP1000 (specs 4V actual 3.9)

I have big mistake above post between L and H and edited post. #3671. I just found when remeasument just now. Ru6 is a volume monster!

FYI This is voltage out put from Ru6 at max volume (100) then each step reduction of 5 level to volume70. Unit milivolt SE and Bal measurement. SE @ L gain 1082 - 800 - 600 - 451 - 334 - 240 -180. SE @ H gain: twice of L(max 2175mV) BAL @ L gain 2160 -1612 -1206 - 900 - 675 - 479 - 360 BAL @...

I always use L gain unless it is too lacking power. Any volume level 85% is my criteria for driving headphones in which has high dampening factor (high impedance) and 70% if lower dampening. Beyond it I swich to H gain. For feeding an amp, criteria volume is up to 90% or even 100% if I am sure...

I guess a driver put in to a large room. Small room usually elevates bass and compression, raise of pressure

Not like how it looks, there's no problem. About sound: Big stage. Real sens of big size drum and real feel of vocal. Any single Spinfit did not suit my preference

My latest ear tip is abit complex