Did I get a faulty Unit from Douk Audio M1 Pro? Tear Down with Pictures; too much GLUE?
Jul 4, 2022 at 2:41 PM Thread Starter Post #1 of 2

jayteeare

Head-Fier
Joined
May 26, 2020
Posts
72
Likes
16
Location
ontario
I recently bought a DoukAudio M1 Pro bluetooth amp/dac, and when I connect to my JBL HLS Center speaker, no sound comes out. I have used this same speaker with my SMSL 50 and I know the problem isnt the speaker, or even the banana clip/wires im using. I took pictures of my set up with the M1, and also opened up the inside to get some good pictures of the inner components.

The M1 powers on fine, and is able to pair the bluetooth via my iphone and Fiio M15 without issue with the BT finding my devices (shows up right on my phone detected BT devices and it shows up quickly) however NO SOUND comes out of the speakers.

Im wondering if its something im doing wrong, or if the unit is faulty. The power supply seems legit, but I'll add that when I plug the power adapter into the device, there is a minor electric spark noise (without any sparks).

I also tried to add my SMSL 50 into the mix as a pre amp, and daisy chained the cables from the SMSL to the speaker outputs of the M1 Pro, but nothing, still no sound. Im wondering if this was a soldering issue, or maybe way too much glue on the copper coils inside, or something maybe in the pictures attached that Im not privvy enough to know of due to my clearly lacking electronic skills. I do have a brand new multimeter from Harbor Frieght, its a cheap $5 one, but I have no idea how to use it or apply it to see if the speaker outputs on the M1 have any current running through them.

Thanks in advance for your help, tips, advice and participation in helping me figure this out.
 

Attachments

  • IMG_2289.jpg
    IMG_2289.jpg
    18.7 KB · Views: 0
  • IMG_2290.jpg
    IMG_2290.jpg
    21 KB · Views: 0
  • IMG_2291.jpg
    IMG_2291.jpg
    25.3 KB · Views: 0
  • IMG_2292.jpg
    IMG_2292.jpg
    22.9 KB · Views: 0
  • IMG_2293.jpg
    IMG_2293.jpg
    20.7 KB · Views: 0
  • IMG_2294.jpg
    IMG_2294.jpg
    19.8 KB · Views: 0
  • IMG_2295.jpg
    IMG_2295.jpg
    23.1 KB · Views: 0
  • IMG_2296.jpg
    IMG_2296.jpg
    21.3 KB · Views: 0
  • IMG_2297.jpg
    IMG_2297.jpg
    22 KB · Views: 0
  • IMG_2298.jpg
    IMG_2298.jpg
    24.6 KB · Views: 0
  • IMG_2299.jpg
    IMG_2299.jpg
    17.3 KB · Views: 0
  • IMG_2300.jpg
    IMG_2300.jpg
    15 KB · Views: 0
  • IMG_2301.jpg
    IMG_2301.jpg
    25.5 KB · Views: 0
  • IMG_2302.jpg
    IMG_2302.jpg
    19.3 KB · Views: 0
  • IMG_2303.jpg
    IMG_2303.jpg
    261 KB · Views: 0
  • IMG_2304.PNG
    IMG_2304.PNG
    208.5 KB · Views: 0
  • IMG_2305.PNG
    IMG_2305.PNG
    223.2 KB · Views: 0
  • IMG_2306.jpg
    IMG_2306.jpg
    13.2 KB · Views: 0
  • IMG_2307.jpg
    IMG_2307.jpg
    12.7 KB · Views: 0
  • IMG_2308.jpg
    IMG_2308.jpg
    13.8 KB · Views: 0
  • IMG_2309.jpg
    IMG_2309.jpg
    24.3 KB · Views: 0
  • IMG_2310.jpg
    IMG_2310.jpg
    20.4 KB · Views: 0
  • IMG_2311.jpg
    IMG_2311.jpg
    19.8 KB · Views: 0
  • IMG_2312.jpg
    IMG_2312.jpg
    17 KB · Views: 0
  • IMG_2313.jpg
    IMG_2313.jpg
    19.2 KB · Views: 0
Jul 5, 2022 at 5:17 PM Post #2 of 2
The glue or potting compound is normal and a good idea. Still, don't expect too much from this kind of gear.

I don't know if you are aware, but the pictures are tiny, I can't see much. Best to contact the company and ask for setup help. Hopefully it's a minor oversight and is working properly.
 

Users who are viewing this thread

Back
Top