Just adding this for opamp options. I’ve tried probably 10 different opamps in the Xduoo xd-05. Besides the Sparkos Labs SS2590 the only other opamp that wowed me was the Linear Technology LT1364 Opamp, which is pretty inexpensive, like $10. But Beware of fakes though. It was better than the...

The only way to fry the opamp it to install it 180 degrees out of index in the socket. I fried a Sparkos SS2590 dual in an Xduoo XD-05 that way. Expensive lesson to remind me to take my time and not work on stuff when I’m tired. And yes the SS2590 is a very noticeable upgrade in the Xduoo XD-05...

The battery should be labeled with voltage. 3.7v maybe. Other than that just fit the biggest mah rated battery that matches the dimensions of the original battery. I believe Xduoo put 4000mah and 5000msh batteries in the Xd-05’s. I just googled and this popped up. Link

I’d suggest just measuring it and selecting a 4000-5000mah lipo battery that fits from aliexpress. You may have to swap the connector over from the old one.

The Sparko Labs SS2590 was the only discrete op amp I tried. Recommended by Youtube reviewer Michael Bruce and then I did some web research. I have Burson V5i and V6 opamps, but I didn't try the V6 due to form factor. But from information that I found the Sonic Imagery sounds almost identical to...

Oracle ll was meh,compared to the Burson V5i and Sparko Lab ss2590. The Sparko is by far the best, but requires cutting case for fit.

Cool, I just ordered some to AB with my Burson collection.

I have the original XD-05 that has the USB-A input and dual op amp only. I've rolled a few opamps over the years but recently the Sparko SS2590 Pro is just plain awsome in this AMP(recommended by Michael Bruce on youtube). I went from the Burson V5i then to the Sparko and there is a world of...

This excellent reviewed dongle DAC is like new. I originally thought it was MQA capable based on a reputable reviewer, but alas it’s not. So I ordered a MQA dongle for my Tidal listening. I’ve had this Hidizs S9 Pro for 3 months. It’s 100% complete with box. I’ll ship for free CONUS.

Yes, a cable as you describe should work fine. The 2.5mm ends can be stereo type or mono type. Either should work. If you can find mono ends I think they might work better in the Verum 1’s. I’ve had a lot of connectivity issues with the 2.5 stereo type tips. Regarding balanced vs. single ended...

Not sure. I have the Blue App but thought those were just limit adjustments. I’ll get in there and work with the controls. Thanks.

Also the volume control is too coarse when using with an iPhone. iPhone uses a stepped control instead of smooth and linear. So with the W5 I can’t get my IEMs to the volume I like. Volume levels are either too low or too high on the increment of volume positioning.

W5 EQ works ok but no where near as well as the ES100.

I use just one single ply between cushion mesh and the drivers.