Veemoon Tube Amplifier Hi-fi Stereo Preamp Pre-amp for Record Player Pre-amp for Phono Preamp Home Theater Amplifier Board DIY Part Tube Abs Phonograph HiFi Front

The tube preamp filter works great. You will need to buy a 12v 2a adapter to properly operate it. Tubes were 6k4. Placed after Dac for Blu-ray player for cd music.

Doesn’t come with the power supply, and didn’t work with the power supply I tried.I would’ve returned it if I had not waited so long to try it.

Others have also mentioned that you have to source your own power cable. They also say no instructions. If you know what you are doing the PCB has screen printing that explains most of what you need. Does not specify power need on board. I’m using a spare 12V 3A adapter I already had lying around. As for audio quality it seems fine to me. Seems no different than the non-tube amp I use on another of my systems.

The tubes came loose in the box . it has no power supply, had to seat tubes legs bend should of come installed and tested .i'm not sure i seated the tubes correctly . i used my 9 volt guitar peddle power supply not sure it has enough power. could be me . nice looking item. i'll keep it look at it.

Excellent pre-amp. this comes fully assembled the sound is very good but can be improved with a tube upgrade. This unit can run off a DC or AC power adapter. The little switch on the left slightly increases the mids and highs to 2 different levels.

Just like the title says. How do I plug it in? What do I plug it in with? What do the three switch positions do? I found "IN" and "OUT" behind two sets of red/white RCA jacks and nothing else. No manual. No link to a manual. No diagram.

Using this somehow makes the audio quieter.With no amp i have to set the hifi volume to 30 to hear audio, with this it needs to be at 36 and has a horrible buzz.