Mine makes no noises at all during power cycles. It has no internal dac so maybe the dac causes the noise at power cycles for a lot of people.

Yes, even if you use the RCA inputs, both headphone outputs are active. The Balanced output is significantly louder though.

This would not make the IEM-s balanced because the trs connection shares the ground between the left and right channel. If you connect the left - and right - it would not create a proper ground, would cause distortion and potentially damage the amp due to the short circuit between the two...

It is due to the fact that only two of the 4 channels in the amp are used in SE mode. 

I don´t think there is a switch for this situation, so you would have to build one for yourself. A passive cable without a switch would not work because for the SE connector you have to connect the two - signal wires from the left and right side. This would not allow proper balanced operation. I...

I also have a SE tube amp, I solved the problem by building a 4 pin xlr to trs adaptor. That way I can keep the balanced cables on the headphones. The connectors on the headphones are probably not designed for frequent cable changes anyway.

I received my amp today. The first impressions are pretty good, the single ended output performs nice and has enough power for most headphones. I modded my HD 650 to balanced to test the balanced output. For the HD 800 I will be building an extra cable in the future, I did not want to cut the...

Judging by the shipping time of two weeks, I guess the trick is that they don´t sell from the UK. The UK warehouse doesn´t seem to have anything available, they just forward packages from hong kong. They can probably get around the problem of not having a a CE certificate by this.

I took some pictures of the inside of the x20. Looks like not much has changed since the first revision. It still has the same clocks and the upgraded usb input.      

I checked it and I did not see any CE marks on the dac. Thanks I will test this driver as well.

I will check it in the evening when I am at home. I choose the option with the UK warehouse so I did not have to pay import duties or tax.     I also ended up downloading it with internet explorer, I also had to deactivate windows smart screen for the installation. I guess it really has no...

Hi, thanks for contacting them for me. The price seems reasonable, I will meause which size replaces the original one best, hopefully it is possible to a fit a repacement in the original case. 

My x20 arrived on friday from Kidult. It came with a printed manual in english and chinese, the remote had the battery included, a chinese power chord and an already broken and therefore very dangerous chinese to euro plug adaptor. There was no driver cd so downloading was the only option...

I do have a new DAC incoming but I would be interested in repairing the Asus if it is possible for a reasonable price. Do you have an estimate how much it would cost to build a repacement power transformer? Thanks for your help.

I had the Asus Xonar One for some years now but sadly it broke a couple of months ago. The isolation on the power transformer melted     Interestingly there was no visible damage on any connector or PCB. Looks like the wires in the power tranformer were poorly isolated and the isolation...

No problem, I will take some pictures once it arrives. I am also interested if there are any more changes.

I just bought an x20 on friday but it will probably take 2 weeks until it arrives.

So it is bad news for Gustard x20 users because the driver will not work anymore with the dac?

I tried to download the diyinhk driver above but the price is now 5$. Did they raise the price of the driver to 5$ since this was posted?

In case of 16 Bit music you can use 8 bit for volume control. You can lower the volume by 48 db without losing bit depth.

The amp will not work correctly without the LED. You need a HLMP-6000 as a replacement.

The scarlett has a built in dac and headphone amp. You can use the headphone output and the speaker output at the same time. Connecting a headphone amp and speakers should also work if you use for example the unbalanced output for the headphone amp and the balanced output for the speakers. I...

I did a repaint of the bell end a cuple of weeks ago. It wasn´t that bad because the pwer transformer and the terminals around it were sort of held in place by all the wires. For reassembly I just held the chassis plate vertically and screwed the screws into the terminals. For the nuts I used a...

I found a Siemens Silver Plate input tube. Does anyone know if it is any good in the bottlehead?

I made some improvements since the last post with the crack. The first thing I did I changed the interconnect cable. For the first tests I only had a very cheap interconnect cable available. Since then I built a better one with a nice looking Sommer Cable grindycop cable and Hic-on connectors...