Here is what I have (all of it is about 2 months old)
Image Dynamics xs-28 tweeters and x65 mids
JL audio tw3 10:
Rockford Fosgate 360.3
Alpine PDR-V75
4 gauge Power and ground
14 gauge mid Wire and 16 gauge tweeter wire
Here is the issue:
When I have the volume up to just over 50% and higher my speakers will cut out for a split second, turn back on for a split second and repeat until volume is turned down. It increases the cut out frequency the higher the volume. Normally it is fine but the weather has been nice in Phoenix a couple days to drive with the windows down which required a little more volume. Normally I am well below 50% with the windows rolled up as the cab is super quiet.
Here is what I have checked so far:
Impedance on all speakers - Front tweeters were at 4.6 ohms and mids were at 4.4 ohms (measured from wires at amp), sub was at 3.5ohms measured at sub. Should have been at 2 which concerned me so I checked individual voice coils and they were both at about 5.2ohms. I emailed JL about this as the difference between 3.5 and 2 is quite a bit!
Voltages: Mids/Tweeters were set at 17 volts which is about 72 watts for 4 ohms when amp is birth certificate said 116w at 2ohms. Subwoofer was set at 27 volts (for 2 Ohms) or about 380 watts (amp birth certificate said 416 watts at 2ohms) so voltages should be good. This was set using a 0db attenuated tone.
Speakers: I unplugged each Speaker individually and saw if the problem remained, it did not matter what or how many speakers were running.
Power: checked dc voltage going in and it was constant 13.6-13.8 volts so not a Power issue as far as I can tell. Checked the ground and had .3 ohm resistance back to the battery so ground should be good (it is not attached to a seat belt bolt but to a dedicated grounding terminal with all paint ground/sanded off). Also replaced all fuses to be sure one of them wasn't semi-faulty.
No matter what I do the problem of the sound cutting out is still there. I am leaning towards the amp being bad. I haven't investigated if it is the 360.3 much. I tried plugging my iphone in directly to the rca's of the amp but couldn't get enough output out of the phone to produce high enough volumes.
Any other suggestions to try or is it time for me to call alpine as I have only had this thing for about 2 months?
Image Dynamics xs-28 tweeters and x65 mids
JL audio tw3 10:
Rockford Fosgate 360.3
Alpine PDR-V75
4 gauge Power and ground
14 gauge mid Wire and 16 gauge tweeter wire
Here is the issue:
When I have the volume up to just over 50% and higher my speakers will cut out for a split second, turn back on for a split second and repeat until volume is turned down. It increases the cut out frequency the higher the volume. Normally it is fine but the weather has been nice in Phoenix a couple days to drive with the windows down which required a little more volume. Normally I am well below 50% with the windows rolled up as the cab is super quiet.
Here is what I have checked so far:
Impedance on all speakers - Front tweeters were at 4.6 ohms and mids were at 4.4 ohms (measured from wires at amp), sub was at 3.5ohms measured at sub. Should have been at 2 which concerned me so I checked individual voice coils and they were both at about 5.2ohms. I emailed JL about this as the difference between 3.5 and 2 is quite a bit!
Voltages: Mids/Tweeters were set at 17 volts which is about 72 watts for 4 ohms when amp is birth certificate said 116w at 2ohms. Subwoofer was set at 27 volts (for 2 Ohms) or about 380 watts (amp birth certificate said 416 watts at 2ohms) so voltages should be good. This was set using a 0db attenuated tone.
Speakers: I unplugged each Speaker individually and saw if the problem remained, it did not matter what or how many speakers were running.
Power: checked dc voltage going in and it was constant 13.6-13.8 volts so not a Power issue as far as I can tell. Checked the ground and had .3 ohm resistance back to the battery so ground should be good (it is not attached to a seat belt bolt but to a dedicated grounding terminal with all paint ground/sanded off). Also replaced all fuses to be sure one of them wasn't semi-faulty.
No matter what I do the problem of the sound cutting out is still there. I am leaning towards the amp being bad. I haven't investigated if it is the 360.3 much. I tried plugging my iphone in directly to the rca's of the amp but couldn't get enough output out of the phone to produce high enough volumes.
Any other suggestions to try or is it time for me to call alpine as I have only had this thing for about 2 months?
yours for 35 bucks