Hi All: I received a slew of opamps this week that I’ve tried with the Xduoo X05 Pro. 1. Burson V7 Vivid; 2. Ufeek Mk 9 and Trulis HA8802; 3. VTV Amplifier ClassD Ultimate MKII Dual Discrete OpAmp; 4. Sonic Imagery Labs 994Enh-Ticha. I already had the Burson V7 Classic and the Sparkos SS3602...

Hi: I need some clarification with respect to this. I am an early purchaser of the R9, and I wanted to use HDMI to convey music from the DAC to my stereo. I was told that this was not possible. Not it appears that it is possible. Which is it? Do I have to exchange my unit for a more recent...

Thank you kindly. You service has been great. Mike Gutierrez

To the Fiio Rep: I need some help with an order for the Fiio M23. I could not find a dedicated forum for the M23, so I though that I would post this here since I have the R9. I ordered the M23 through the Fiio store on AliExpress (Order no. 8187774537642206). It has shipped, I believe by DHL...

You were right about the opamps. I connected the XD-05 pro from the headphone jack, not the line out jack, to the amp, and it improved the sound even further. Thank you for the heads up. Mike Gutierrez

You may be right. I'll check that out. Maybe I need to connect the 4.4 mm to the headphone connection. Will check it an see.

I found what I think is my best setup so far for the XD-05 pro. I used the ESS DAC module, and the Burson V7 Classic op amps. I then connected the XD-05 Pro to the Xduoo TA-20 plus tube amp with a 4.4 balanced connection (I have yet to try XLR's for now). I had swapped out two of the tubes to...

I just got the V7 Classics. I'll try the vivds when I get my Geshelli Labs J2S. Mike Gutierrez

Hi All: First time posting on this forum. I finally had some time to sit and compare the Sparkos SS3602 and the Burson V7 Classic in the XD-05. I am far from being any kind of audio expert, but I did like the Burson V7s better, but not by a wide margin. I've had the Sparkos for about a...

The white adaptor is a polarity reverser. It changes the polarity that exists in the regular barrel. From the diagrams on the outside of the ifi box and the back of the R9, I found that the regular polarity is fine. I think, but I am not totally sure, that you can damage the R9 by using the...

Hi: I leave it on 24/7. All the best. Mike

To the Fiio Rep: Thank you for responding to by message. What I want to do is use to connect the HDMI out port from the R9 to the HDMI in port on my receiver for the purposes of playing music from the R9, through the receiver, to the speakers attached to the receiver. Right now, I have...

To the Fiio Rep:Can play hires music through an hdmi cable plugged into my Yamaha receiver? I currently have rca cables connecting my R9 to my receiver.

I use USB Audio Player Pro to play all of my hires music saved on my android phones and DAPS. There is a setting under "USB Audio Tweeks"/"DAC warm up time" that injects a 100 ms to 500ms delay before you actually hear a song. This helps get rid of the problem of have the first bit of a song...

I have the ifi ipower elite 15v for the r9. I searched the internet and most sources I found state that the barrel size on the ifi unit is 5.5 x 2.5, and it works fine with the r9. This may not be totally accurate but it was the best I could find. Mike Gutierrez