Phone connects to 808 Canz speaker but absolutely no audio comes through.. what should I check first?

If your 2003 Chevrolet Trailblazer's radio is on but there is no sound coming from it, there may be an issue with the vehicle's audio system. This could be due to a problem with the speakers, the wiring, or the radio itself. It is also possible that the audio system's settings have been configured incorrectly, or that there is a problem with the vehicle's fuse or fuse box. I recommend trying the following steps to troubleshoot the issue:

1. Check the vehicle's audio settings and make sure they are configured correctly.
2. Check the vehicle's fuse box and replace any blown fuses.
3. Check the wiring and connections for the speakers and the radio, and make sure they are secure and properly connected.
4. If the problem persists, try replacing the speakers or the radio to see if that resolves the issue.

If you are still unable to get sound from the radio, I recommend contacting a Chevrolet dealership or a qualified car audio technician for further assistance. It is important to have this issue addressed, as a malfunctioning audio system can be a safety hazard if it prevents you from hearing important sounds such as sirens or other warning signals.

I don't know

I assume both are Bluetooth enabled correct? Also follow the link for detailed information on "pairing devices in Bluetooth"
https://www.groupon.com/articles/how-does-bluetooth-work

Try to use earphones, plug them in to phone audio connector....
try if it works..... if so, disconnect them and plug speakers.... and try again.... if doesn't work, go to audio advanced setup and check if speakers are not muted, or set up voicevolume level is too low. Play with that setup....

Also some computers can turn on or off speakers in Bios.

If problem will not be solved, try to use USB speakers

if it's shutting down when you increase the volume, this usually indicates a bad speaker.

sounds Like a power supply issue and u should always have speakers connected before u turn on maybe power supply is about done open case an check for any leakage on power supply unit or small cracks on it ...if so its pretty well done
Never good to power up without speakers connected can blow power outputs

you have probably blown the output stage in the power amp circuitry.This is a job for a technician.Check speaker wiring for shorting as this will cause this problem.Also get the speakers checked because when an amplifier faults like this it can cause speaker damage.If you are running extra speakers of the wrong impedance and/or they are incorrectly wired this too can cause this fault.

Amps shut down in most cases because the receiver is detecting and impedance (below 4 ohms) that might damage the amplifier. Do a quick check of the speaker connection and look for wires that might be shorted to the frame or have crossed each other. This is the most common cause of the unit shutting down. Check your speakers impedance if you have a meter. If you don't then unplug power from the unit and then un-hook all speaker wires from the receiver. Next connect just one speaker (Front Left) and power the unit back on and take the volume up. If it shuts down then try the Front right all by itself, bring the volume up again. If the unit seems ok then add one speaker at a time and test. Continue until you find the bad speaker/cable. Your amp should be able to drive speakers down to 4 ohms. The NR808 has power monitoring (sometimes called crowbar) that looks for to much current and then shuts down. I suspect you may have a short in a cable or in a speaker. The 808 is a great amp and hopefully your problem is external. If your amp continues to shut down even with just one speaker connected then one or more of your channel amps (internal) is likley bad causing the unit to shut down. Good Luck.

Hi there,

Actually, you could be in luck.

If you are getting 'absolutely nothing', it could be something simple. Open it up (carefully) and make sure the wires are secure on both the speaker and the inner connection leads.

I've come across several this has happened to that were brand new.

Good luck
Mike

A speaker is the first suspect, the second is the speaker connection, the audio amp final ckt. Check for a lose wire, dirty connection, flux, a bad solder connection, ect on the main ckt Bd.