Perry - the volume is loud even when it's on 1 with a max of 40.
I let the radio play for a while then turn the amp on - still have static
I might have misunderstood what you were asking me about the ground connection.
I just now connected the black probe to the head unit and the red probe to a speaker negative wire and got this reading for zone 2. Zone 1 did not show a reading.
I let the radio play for a while then turn the amp on - still have static
I might have misunderstood what you were asking me about the ground connection.
I just now connected the black probe to the head unit and the red probe to a speaker negative wire and got this reading for zone 2. Zone 1 did not show a reading.
Yes, and still have same noise. By adding the speakers to the input has stop the popping/clipping noise when I lower the volume to zero, when I mute the volume, and when I change the source from AM/FM to Bluetooth. The volume with the amp compare to without the amp is much higher at 1 and the head unit goes up to 40. Speakers with the amp sounds like the volume is over 25 (out of 40) compare to sound without the amp when the volume is set at 1.
I think this was suggested earlier and may be the best solution if the head unit has RCA outputs and that would be to connect the RCA output to the amplifier using the speaker level cable. You'd either have to cut an RCA cable or make one up out of RCA connectors and speaker wire. Any cheap cable will work. If you don't have one and can't find a cheap one locally, try the various charity shops. They generally have plenty for $1 each.
The finding of grounds on the head unit speaker outputs and the fact that the gain was so high makes this seem viable.
You'd connect the RCA shields to the same wires (on the amp input) that are connected to the head unit's speaker wires that read 0 ohms to ground with the cables you make up.
Let me know if you need clarification.
The finding of grounds on the head unit speaker outputs and the fact that the gain was so high makes this seem viable.
You'd connect the RCA shields to the same wires (on the amp input) that are connected to the head unit's speaker wires that read 0 ohms to ground with the cables you make up.
Let me know if you need clarification.
While I was looking for some RCA cables, I came across this line output converter. Could I use this to connect to the amplifier input speaker wires and then connect the RCA cables to the head unit since it has RCA line output? I've only used this in the past to connect the head unit speaker output to convert to RCA. Is this only meant to transmit one way? The only RCA cable I could find at home was a single strain wire (not one with negative and positive). I will have to a pair tomorrow.
The passing of audio in reverse would depend on its internal construction but the RCA outputs on the head unit would have to have a very low output impedance to drive it backwards if it's the type with transformers. It may give some other options after you get some RCA cables. Try to find some cheap ones.
With the RCA there was no sound. Picture below shows line out left and right and this is from the head unit.
I connected different combinations and finally got the static the stop (without RCA). Turned off system for 10 minutes or so and then turn the radio on first then a minute or so latter turned on the amplifier and the static is back. I think I’m going stop playing with this for a while and maybe I will look at it again after the holidays.
Thanks for helping me!! I’ve learned a few things.
I connected different combinations and finally got the static the stop (without RCA). Turned off system for 10 minutes or so and then turn the radio on first then a minute or so latter turned on the amplifier and the static is back. I think I’m going stop playing with this for a while and maybe I will look at it again after the holidays.
Thanks for helping me!! I’ve learned a few things.
If/when you look at this again, you could try (assuming that you don't have an oscilloscope) to measure the AC voltage across the shield and center conductor of the RCA output on the head unit to see if you see any changes in the AC readings when the volume is set high (music playing). This is just to make sure there is output from the RCAs.
If not, you could try using the LOC to convert the speaker output to RCA level. It may prevent the amp from having the hiss caused by the speaker level input.
If not, you could try using the LOC to convert the speaker output to RCA level. It may prevent the amp from having the hiss caused by the speaker level input.