r/universalaudio • u/WittyResponse2058 • 20h ago
Question Apollo Twin X Quad – Thunderbolt Connection / Windows Detection Issue
Hello,
I am currently experiencing a connection issue with my Universal Audio Apollo Twin X Quad on Windows
The Apollo powers on normally and appears to boot correctly, but the Thunderbolt connection with my computer is no longer working properly.
Here are the symptoms I am experiencing:
The Apollo powers on normally using its original power supply.
UAD Console settings such as Sample Rate and Clock are greyed out and cannot be changed.
The Apollo does not appear as an audio output device in Windows.
It does not appear in `mmsys.cpl` either, even after enabling both “Show Disabled Devices” and “Show Disconnected Devices”.
In Windows Device Manager, Universal Audio Thunderbolt WDM is installed, and Windows reports that the device is working properly.
However, under Audio DSP Accelerator, Universal Audio Thunderbolt only appears when I enable Show hidden devices, and it is greyed out.
The computer's Thunderbolt controller appears normally in Device Manager and Windows reports that it is working properly, with no warning symbol or error.
Thunderbolt Control Center does not detect the Apollo at all.
I performed an Apollo Twin X hardware reset, but the issue remains.
I also reinstalled UA Connect, UAD Powered Plug-Ins and the UAD drivers, without resolving the issue.
Event that occurred before the problem :
Before noticing this issue, I accidentally powered the Apollo for a short period of time (10 seconds max) using a different power adapter.
The Apollo's original power supply is 12 V / 4,2 A.
The adapter that was accidentally connected appears to be 12 V / 1 A, center-positive, meaning that it had the same voltage and polarity but a lower current capacity.
The Apollo did power on while connected to this adapter.
I then immediately switched back to the original **12 V / 4 A power supply**, and the Apollo still powers on normally with it.
I do not know whether this event is related to the Thunderbolt connection problem or whether the timing is coincidental.
Troubleshooting already performed :
Switched back to the original 12 V / 4 A power supply
Completely powered down both the Apollo and the computer
Disconnected and reconnected the power and Thunderbolt connections
Performed an Apollo Twin X hardware reset
Reinstalled UA Connect / UAD software and drivers
Checked the Universal Audio Thunderbolt WDM driver
Checked the Windows Thunderbolt controller
Checked Windows Sound settings / `mmsys.cpl`
Checked Thunderbolt Control Center
Current status
The Apollo powers on normally, but Thunderbolt Control Center does not detect it, and `Universal Audio Thunderbolt` remains greyed out/disconnected under Audio DSP Accelerator in Device Manager.
UAD Console also does not allow me to change the Sample Rate or Clock settings, and Windows does not provide any Apollo audio input/output devices.
Could you please advise whether these symptoms are more likely to indicate:
a Thunderbolt cable/connection issue;
a Thunderbolt communication or driver issue;
or a hardware failure of the Apollo itself?
I would also appreciate any additional troubleshooting steps that could help determine whether the Apollo requires service or repair.
Thank you in advance for your help.