Has any used the signal generator app available in the Apple Store as the test tone for setting gains on their amps? It’s a free app that is adjustable for range, gains and frequency. Just wonder how accurate it may be. Thanks!

 

Signaling needs to be done via USB thumb drive, too much loss in Bluetooth.

You can download the tones here:
https://www.stevemeadedesigns.com/bo...w-links-again/

 

What about playing the tone via my phone through the USB cable?

 

Loss thru the phone as well. With the thumb drive there is zero loss and an ultra clean signal as only the head unit is involved.