Thomann NT 0910 AC/PSA

Used for "Palmer Pocket Amp Bass" preamp and it adds a lot of hum noise.
Same preamp with battery or BOSS PSA adapter is perfectly silent.

For 10€ you can buy a rechargeable usb 9v battery and and adapter. This thing hums like crazy.
It's not only Thomann you are selling bad quality power supplies like this; other "well named" brands are doing the same. It is a shame that they sell unfiltered power supplies for musical applications.
Complete waste of money.

Because this is an unregulated power supply, it causes a strong buzz or hum, particularly when used with a high-gain pedal. Basically, when a music supply store decides to sell something like this, it should come with a clear warning that it cannot be used for most instruments and effects.

Virtalähde ei sovellu ainakaan analogisille pedaaleille, todella ärsyttävä korkeataajuinen surina tulee läpi.

A lot of electrical interference noise.

unfortunately makes noticeable noises with normal not energy hungry pedals , a waste of time to keep looking for the source until i found it was this...

Unfortunately this power supply adapter has a hum in it that made it unusable with the pedals I bought it for. A few good capacitors and decent bridge rectifier would have made a difference. Back to batteries.

Really annoying buzzing when connected Zoom B1Xon and using headset with Zoom. Using Zoom with batteries instead.

I wish someone would have realized it was being sent to US. A converter is needed to work in US, just need a US adapter

I bought this to use with my BOSS RC-3 Looper and it does so much noise... it's incredible.

I tested it with a DB Meter and in some cases, it would do almost TWICE the noise comparing when using a 9v battery.

I only play at home so maybe for studio or live situations it would be fine, but just to practice it was keeping me away from my looper, had to return it.