Fosi Audio MD3 MagDac

[VientoB]

I've seen these on youtube etc in the last couple of days. It's a portable DAC/headphone amp that is magnetic and sticks to your mobile phone (or anything else magnetic)

Fosi Audio MD3 Portable Magnetic DAC / Headphone Amp

Fosi Audio MD3 Magnetic Portable DAC/Amp with Circular Display, Compact, Lightweight. Vista Button lets you browse photos while enjoying high-quality audio.

fosiaudio.com

ESS chipset, it has a circular screen. Lacking (P)EQ.

Not sure I'm overly enthusiastic about a magnet next to my phone but I guess it's safe enough or they wouldn't do it?

It's on kickstarter just now: https://www.kickstarter.com/project...e-dac-amp-dongle-with-rear-display?ref=26qn60

 

[staticV3]

not sure I'm overly enthusiastic about a magnet next to my phone but I guess it's safe enough or they wouldn't do it?

This almost certainly uses the QI2 magnet configuration, which only works with phones that have the matching QI2 magnets embedded into their back panels (e.g. iPhones with MagSafe, Google Pixel 10 series).

Those phones were specifically designed to have magnetic accessories stuck onto them, so no issues there.

This would also mean though that the MD3 can only be stuck onto those select phones, and likely won't stick onto other phones or just any random ferromagnetic surface, as the QI2 magnets inside the accessory are usually too weak to hold the accessory's weight on their own. They need the matching pair inside your phone to work.

 

[Somafunk]

This almost certainly uses the QI2 magnet configuration, which only works with phones that have the matching QI2 magnets embedded into their back panels (e.g. iPhones with MagSafe, Google Pixel 10 series).

Those phones were specifically designed to have magnetic accessories stuck onto them, so no issues there.

This would also mean though that the MD3 can only be stuck onto those select phones, and likely won't stick onto other phones or just any random ferromagnetic surface, as the QI2 magnets inside the accessory are usually too weak to hold the accessory's weight on their own. They need the matching pair inside your phone to work.

I’ve thought about buying one from their kickstarter page as I really like the design and the screen is k8nda cool but rationality kicks in and I decide I’d never actually use it as my jm20 or my Hiby d1 dongles do me just fine.

I do have a few MagSafe Qi2 chargers and other MagSafe items for my iPhone 17, they all stick to ferromagnetic items and can easily support their own weight so I expect the Fosi md3 to no different

 

[staticV3]

I do have a few MagSafe Qi2 chargers and other MagSafe items for my iPhone 17, they all stick to ferromagnetic items and can easily support their own weight so I expect the Fosi md3 to no different

Try a magsafe battery bank, which should be in a similar weight category as the MD3

 

[Somafunk]

Try a magsafe battery bank, which should be in a similar weight category as the MD3

My 5000mah and 10000mah MagSafe battery banks are currently stuck to the side of my desk cabinet, they use 15n and 17n magnets so it takes quite a bit of force to remove them - see below for what I use, very slim but they are only 15w Qi2 MagSafe charging so I may buy the new Qi2.2 versions when they are released with 25W of charging as more power is always better….isnt it?

https://www.aliexpress.com/item/1005009127238944.html?spm=a2g0o.order_list.order_list_main.29.549018021pbLSm

 

[staticV3]

see below for what I use, very slim but they are only 15w Qi2 MagSafe charging so I may buy the new Qi2.2 versions when they are released with 25W of charging as more power is always better….isnt it?

Some newer power banks come with low power modes to extract more of their internal capacity, so..perhaps not

Much obliged for testing your magsafe banks and proving me wrong!

 

[SoySalsaPicante]

This almost certainly uses the QI2 magnet configuration, which only works with phones that have the matching QI2 magnets embedded into their back panels (e.g. iPhones with MagSafe, Google Pixel 10 series).

Those phones were specifically designed to have magnetic accessories stuck onto them, so no issues there.

This would also mean though that the MD3 can only be stuck onto those select phones, and likely won't stick onto other phones or just any random ferromagnetic surface, as the QI2 magnets inside the accessory are usually too weak to hold the accessory's weight on their own. They need the matching pair inside your phone to work.

I don't know about devices without magnets, but my MD3, which arrived today, sticks nicely to my iPhone 17 Pro, as well as to my FiiO JM21 DAP, which I adhered a self-sticking MagSafe magnet ring to.

As for performance, it sounds transparent, and has sufficient power from balanced output to drive even my Dan Clark Aeon 2 Noire closed-back planar magnetic headphones as well as my FiiO FT7 open-back planar magnetic headphones, and that's on Low Gain. It also has zero hiss/noise floor when driving my Thieaudio Hype 4 IEMs from the single-ended output. The menu interface is very easy to work, and it's nice that it has a locking function for the display button so that it doesn't randomly change display mode just by putting the phone down.

 

[60beetle60]

I really like this form factor with the magnet and usb power passthrough, if only it had built in EQ it would be perfect for me.

Currently got a Fiio Meolody but then use one of the magsafe dac holders with elestric strap to hold it to my phone and need a usb splitter cable to charge my phone and use the DAC at the same time. This builds in all the bits and bobs I use with the DAC right into the DAC which is awesome. I could take or leave the screen but it would be handy if it had EQ to use the screen to cycle through EQ profiles on the go

 

[Redacted]

In the world of guitars and pedal boards, most people use 3M Dual Lock tape.