Send it back ASAP. Now you know it's not normal.

If you are brave, I would open the case and take a good picture of the bad side vs the good side socket. Top of board and bottom. Maybe you are able to see some bad solder or some extra small issue compared to the good side. Be sure to remove the tubes for a good clear picture. Keep an eye on...

Great I've been waiting for some modifications to come along. I would like to add some better output caps but I am not good at reverse engineering the board to locate them. The socket modification is a great start. Keep up the effort. Please add pics. ty

Can someone with the balanced input (rear) and balanced outout (front) 4pin XLR to headphone do me a favor? Remove one channel from the rear xlr connector and see if music bleeds into the headphone cup you removed. You should only have music in one headphone cup and it should be dead silent in...

I have XLR input to balanced headphone and no problems so far. Works fine. I would check different cables and see if the issue is still there.

Ha, your right. For now it just works until I get the balanced XLR 4 pin headphone re-wired. The amp can do input from behind balanced XLR and out the front standard 1/4 Stereo headphone jack, NOT using XLR 4 pin yet. I just choose the inputs and outputs so I can use it while I wait. Not my...

Yes, you got it. I'm also looking at the different cable combinations. My DAC is non-balanced so here is what I got so far. xlr to RCA. Works real good. Waiting on the headphone balanced wires. Thank you.

Shane D, Would you be so kind as to draw out the connections in that cable, if you are able? Buzz them out with a continuity ohm meter so we can learn how they wired the connectors, 3.5mm jack 4 pole to XLR balanced. I have seen the wiring diagrams on-line in two different ways. Thank you in...

To remove the tubes, grab each one with index and thumb fingers with two hands. Rock them back and forth ever so slightly while pulling up. Don't pull straight up. It's more of a wiggle movement while pulling up. my2cents

GravityEyelids, great job on clearing up your issues. Good to learn that I am not the only one who really enjoys the amp. Per your idea and what you mentioned in the original post. I ordered the xlr to RCA 1ft cable that will attach to my DAC. It's on a slow boat from over seas so no time soon...

so are you saying the new 6N3P $15 a pair are better, in your opinion over the slyvania 5670s?? FYI - volume on the Shure 1540 at -33 (lower power) very smooth sound - remember -60 is off volume on the DT1770 at -30 (more clinical precise sound, more tight thump) volume on the HD 6xx at...

They are an improvement but I can not say how much since I just got the amp. I got my tubes for $19.58 for two - $9.95 each. I have read over and over that the Russian tubes sound really good but I don't want to spend that much. I also knew I didn't want to keep the ones that come with it. Do a...

"might swap the tube with I think it's called GE 5670? I did take a chance on cheap ebay Jan 5670W General Electric co. tubes. Be aware they are tiny and sit real low in the amp compared to the orginals. I'll take pic later, still enjoying it so much that I don't feel like shutting down.

Just got the P20. PC spotify (USB) > Khadas tone board (non-balanced)> Loxjie P20 amp > Shure 1540 Non-balanced for now until I make new cables for the headphones. I want to use the single ended for a while and determine what the balanced adds. I like that I can experiment with so many...

I'm afraid the only way to see if something is broke is to place it back to the way it was and see if the sound goes back to normal. If it still sounds bad then I suspect you damaged or melted the speaker while heating the solder and it now does not move correctly to sound right. You did say...