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Help identifying Elac Sub 2050 service port


Major Contributor
Forum Donor
Mar 23, 2016
Sweden, Stockholm
Since IOS 13 I’m not able to control my Elac Sub 2050 anymore. Setup of the sub is done thru iPad/iPhone Bluetooth connection. New Elac firmware is needed to enable IOS 13 Bluetooth connection.

Elac just released said firmware with update instructions. Instructions:

Disconnect the power cable and wait 5 minutes.
2. Unzip and Save the attached file ‘elacs12.hex’ to a root of a of usb flash drive.
3. Insert the thumb drive into the service port of the subwoofer.
4. Plug the subwoofer in.
5. The blue LED will go through a series of blinking on and off.
6. Once the LED turns off and stays off, unplug the device.
*note* if the LED turns on and stays on for longer than 5 minutes. It means the process failed, so restart at step 1.
7. Remove the thumb drive.
8. Wait another 5 minutes and turn the subwoofer back ON by plugging it back in.

The instructions seems to be wrong! The service port on the sub looks like below picture, not a USB port.

So, I need help in identifying the port.



Active Member
Nov 4, 2017
East Coast, USA
No USB flash drive is going to fit that jack. It looks like a proprietary design as you might find on some brands of digital camera. You'll need to contact ELAC to see if they offer an adapter or a referral to somewhere you can get one.
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