Have a PPI A300 amp connected to the front speakers. I am noticing some slight static when the car is off. When the car is on, there is some slight wining as well. I ran both neg/pos 4 Gauge straight from the battery and have made good connections on both ends.
Can the amp itself be the issue? It seems the input is quite sensitive as well as I have a Xover 2XS in front of the input which I had to turn the gain almost all the way down on it or the volume is very loud at low volume levels on the head unit.
Thanks
Can the amp itself be the issue? It seems the input is quite sensitive as well as I have a Xover 2XS in front of the input which I had to turn the gain almost all the way down on it or the volume is very loud at low volume levels on the head unit.
Thanks
If you drive it directly (no XO) do you still have the noise?
Without the XO, do you still have excessive gain?
Where are the gains set to?
Has any work been done to the amp?
Without the XO, do you still have excessive gain?
Where are the gains set to?
Has any work been done to the amp?
If you drive it directly (no XO) do you still have the noise?
yeah, still hear it without the XO
Without the XO, do you still have excessive gain?
yes, when i didn't have the sub in i just turned the amp gain down so it wasnt so loud at low HU volumes, but still had the noise
Where are the gains set to?
XO almost all the way down, amp all the way up
Has any work been done to the amp?
No
The large resistors next to the RCA input look like they may have gotten quite hot as well.
This amp was in a system that had some sort of issue that blew some input traces off the old XO as well as an EQL on the RCA input paths. The amp functions fine other than this low level static however
yeah, still hear it without the XO
Without the XO, do you still have excessive gain?
yes, when i didn't have the sub in i just turned the amp gain down so it wasnt so loud at low HU volumes, but still had the noise
Where are the gains set to?
XO almost all the way down, amp all the way up
Has any work been done to the amp?
No
The large resistors next to the RCA input look like they may have gotten quite hot as well.
This amp was in a system that had some sort of issue that blew some input traces off the old XO as well as an EQL on the RCA input paths. The amp functions fine other than this low level static however
If excessive gain, why not have the amp gains full minimum.
The burned traces and resistors seem to indicate that it has a shorted transformer (possibly intermittent).
With no power applied, measure the resistance from the input RCA shields to the B+ terminal. Twist/push/pull the transformer. While doing that does the resistance ever change?
Are the input resistors within tolerance?
The burned traces and resistors seem to indicate that it has a shorted transformer (possibly intermittent).
With no power applied, measure the resistance from the input RCA shields to the B+ terminal. Twist/push/pull the transformer. While doing that does the resistance ever change?
Are the input resistors within tolerance?
I will check this, was also going to try turning the amp gain down and the input gain up. Thats a good suggestion.
The amp itself has no burnt traces and looks good except for those 2 resistors are a bit discolored; I will check the values on those and the shields to B+ and get back to you.
Thanks
The amp itself has no burnt traces and looks good except for those 2 resistors are a bit discolored; I will check the values on those and the shields to B+ and get back to you.
Thanks