My IX35 2015 radio volume is zero every time I start the car how do I set it to a audible volume when I start the car.

SOURCE: When the radio is powered

If this is a high-pitched tone it probaly is from the DC-AC inverter that provides the high voltage to light up the front panel. Normally, this is barely audible, but I've seen a few that are loud enough to be annoying. It may be possible to install a small filter in the power line to the inverter, inside the radio. I've never tried this but if the inverter is the source of the noise, this will be the most practical way to isolate ite & eliminate the problem.
This should onlty be attempted byan experienced CB technician.

SOURCE: iSymphony CRDCD clock radio alarm programming

Play around with the Alarm1 button, test it every minute and when it goes off press Alarm1 again to stop it, not snooze. Then try pressing vol + as nothing is playing. Keep trying until your alarm goes off at the desired volume that you put in your Alarm1 settings

SOURCE: NAD 3020 amplifier cuts out

Swap the speakers to see if it correlates.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

SOURCE: Is it normal that comfortable listening is at 25-30 volume setting on bose radio; radio hardly audible until volume setting 8/9 is reached

It is possible that different people have different hearing capacity. If 25-30 does the job, be happy. Nothing wrong.

Testimonial: "Don't think my hearing is an issue ; can hear the music at a distance of 7 feet when on volume 2-3 .. Just possibly miscalculated I volume increment .. Expected a radio at volume 25 to be loud .. Can still talk comfortably at this volume across the room ... Is this normal ? Is my unit defective ?"