I had purchased a Bose T4S Tonematch mixer online in Dec 2019.
Worked seamlessly until 2 months back when it started giving a white noise in channels 1 & 3 whenever the Phantom power is switched on. Upon pressing the button, a huge disturbance/rush of electricity maybe comes in the channel and dies down within 5-6 seconds.
Also, the aux out channel is having the same issue.
The problem started occurring when I switched on the 48V while the gain and volume knobs for channels 1 & 3 were open which were connected to a condenser and a mandolin with a pickup. I heard a loud crackle and the white noise started occurring thereafter.
I don't know how to deal as I live in Mumbai, India and the product was purchased in New Jersey, US. I have tried connecting to their support team but got no response probably because of the COVID-19 lockdown.
Hey, welcome to the Bose Pro Portable Community!
Thanks for your post, I'm sorry to hear about the issue you're experiencing. To get a better idea on the setup you have, please could you confirm the following:
Also, if possible, could you please provide a short video clip showing the issue for reference?
To answer your question
2. Yes. It always happens when I toggle the Phantom power button. On or off.
3. It happens regardless of the FX settings, I've tried with FX mute, all set to zero, unity. Nothing changes.
4. I am connecting my acoustic guitar through a Fishman rare earth mic + electromagnetic pickup into channel 4. Then, I'm taking the aux out into my pedal chain (consisting of tuner, reverb, octave & a looper) whose output I take back through aux in. The looper after recording, plays back a loop with a heavy white noise. I'll update this forum with a video of the same soon.