Has anyone tested this opa1622 op amp? Won't the resistors and custom circuit damage the xd05 pro device? I tested it and it makes a soft popping noise during play/stop. It has a warm, mellow sound and wider than opa1612.

Yes, of course.

I can thank the Amazon seller that the xduoo service responded to the problem. After that, I kept in touch with the xduoo service by email.

Yes, The xduoo engineer promised to send a modified module (with a different resistor). This price: 20usd

Hi everybody! My package was delivered by the xduoo service today. For white noise, I get an amp module that the service modified. Price: 20usd

Electric, ticking, crackling noise. This is normal, it was also present with topping g5. Then you also have volume control inaccuracy. :)

If I turn the volume control slowly or quickly, doesn’t matter.

Thank you!

The digital volume knob sometimes moves 2 steps forward. Anyone else experiencing this?

I don’t experience different charging options.

Thank you for the feedback! Then my unit works fine, as does yours. One thing I don't understand is why the manufacturer writes differently in the user manual. You can check it too.

When the battery is fully charged, is the led red or green? For me it will be red light when it is charged to 100%.

Hi, I am currently using LME operational amplifiers with bluetooth. A slight noise can be heard between start-pause only when I press it, the bluetooth receiver chip causes the noise, but it is not disturbing. I can hear it with all operational amplifiers. If you only hear the noise at the LME...

I am experiencing this error in bluetooth mode (ldac codec). In Eco mode, also with stock amp.

Hi! Who and how uses OLED displays? Leave it on or use it with a timer? Since yesterday, sometimes it doesn't turn back on both displays, it doesn't respond to any buttons, but after 5-10 minutes of turning it off, it solves the problem. Very interesting.

Or yours is already with reduced gain, so you don't hear any noise. “ There is a slight white noise, which is normal, because XD05PRO has high output power, its minimum gain (ECO) also has 12dB (unbalanced) / 16dB (balanced) output.” 12dB in ECO mode is a very high value. Yours may also be close...

I have already spoken to xduoo service. I will describe later how I managed to solve the noise problem. I'll check in later.

Mine is very noisy on balanced output. When the usb control led turns green and then red, I can hear the noise as it goes away and comes on. :/ It sucks.

I will try in the next few days. Thanks for the info.

You tested it on a balanced output?

Hi, first of all, when you check the noise floor, the usb control led should light up green, then turn the volume knob to 0 and listen. If there's no noise, you're a lucky. I hear the noise with an ikko oh10, which is 18 ohms. The noise of the ikko oh2 is less audible since it is 32ohm. I think...

For example this:https://www.audiophonics.fr/en/opa/opa1622-dual-opa-dip8-unit-p-12489.html Reduces the noise of the power supply. There are resistors on the circuit, which reduces the noise typical of desktop amplifiers. Otherwise, these noises in the xd05pro can be caused by low-quality power...

Hi, I managed to research the noise issue. Anyone with a similar noise floor should replace it with higher-quality operational amplifiers. Today I bought a dip8 operational amplifier (opa2134) and the output socket was much noisier. you need an amplifier that suppresses circuit noise better. Can...

I mean it doesn't solve the real problem. Because many people have reported that they don’t experience any noise on both ba/se output.