fireplace369
Junior Member
Hi.
The problem I am experiencing is that after 5-7 minutes of my music playing my subwoofer by itself decreases in volume as well as overall intensity. This problem pretty much only occurs when the car is at idle. This hardly happens while I'm driving around. This problem also happens after the same time frame after I stop driving and listen to my music while at idle. Once this volume drop happens it stays like this until I stop listening to music altogether for awhile, or I shut my car off and come back later (which is my assumption that the batcap is charging during this time). I cannot figure out my problem.
This is everything I have in my system and what I have done so far to troubleshoot:
I have a 2001 Saab 9-3 car. The subwoofer is a brand new Alpine R-W10D4 wired in parallel to 2 ohms powered by an Alpine MRV-M500 amp. This amp provides a little over 500 watts (which is in the correct RMS range for this sub). All of my power cable is 4 AWG OFC from the battery to my batcap, and from my batcap to my amp. My batcap is a XStatic Model 400 which says it's rated for 1,100 to 1,300 watts. My cable from my amp to my sub is 10 AWG OFC cable and all of the cables inside my sub box and cables connecting the voice coils are 10 AWG. The ground for the system is right next to the batcap and goes to a bolt at the bottom of a seatbelt (which is bolted to the frame; the bolt was hit with a wire brush to take off the paint). Mu heat unit is a JVC KD-A805 which was made in 2009. My alternator puts out 130 amps. My regular battery is only a year old and it is a Diehard Gold.
Lastly, I used a multimeter to test the voltage of the system before this volume drop occurred and after it occurred (since it stays at this lower volume once it occurs) and the voltage remained the same the entire time. The voltage was from around 14.3-14.4 volts (the voltage did drop when other parts of my car turned on such as the fan to cool the radiator, etc. but then the voltage immediately went back to 14.3-14.4 volts).
I did blow my last subwoofer, which was the exact same make and model, due to having incorrect wire gauges which caused my amp to clip (I thought it was right but I guessed since the cables had no AWG rating on them). So the amp clipping could have damaged it, but I don't know why everything would work great for 5-7 minutes and then get more quiet after, or while driving have it not happen at all.
I spoke with XStatic specialists and a reputable car audio store near me multiple times and they believe it is either my amp, or the sub line out port on my head unit.
I am out of ideas of where this could be coming from. If anyone could help me that would be greatly appreciated.
The problem I am experiencing is that after 5-7 minutes of my music playing my subwoofer by itself decreases in volume as well as overall intensity. This problem pretty much only occurs when the car is at idle. This hardly happens while I'm driving around. This problem also happens after the same time frame after I stop driving and listen to my music while at idle. Once this volume drop happens it stays like this until I stop listening to music altogether for awhile, or I shut my car off and come back later (which is my assumption that the batcap is charging during this time). I cannot figure out my problem.
This is everything I have in my system and what I have done so far to troubleshoot:
I have a 2001 Saab 9-3 car. The subwoofer is a brand new Alpine R-W10D4 wired in parallel to 2 ohms powered by an Alpine MRV-M500 amp. This amp provides a little over 500 watts (which is in the correct RMS range for this sub). All of my power cable is 4 AWG OFC from the battery to my batcap, and from my batcap to my amp. My batcap is a XStatic Model 400 which says it's rated for 1,100 to 1,300 watts. My cable from my amp to my sub is 10 AWG OFC cable and all of the cables inside my sub box and cables connecting the voice coils are 10 AWG. The ground for the system is right next to the batcap and goes to a bolt at the bottom of a seatbelt (which is bolted to the frame; the bolt was hit with a wire brush to take off the paint). Mu heat unit is a JVC KD-A805 which was made in 2009. My alternator puts out 130 amps. My regular battery is only a year old and it is a Diehard Gold.
Lastly, I used a multimeter to test the voltage of the system before this volume drop occurred and after it occurred (since it stays at this lower volume once it occurs) and the voltage remained the same the entire time. The voltage was from around 14.3-14.4 volts (the voltage did drop when other parts of my car turned on such as the fan to cool the radiator, etc. but then the voltage immediately went back to 14.3-14.4 volts).
I did blow my last subwoofer, which was the exact same make and model, due to having incorrect wire gauges which caused my amp to clip (I thought it was right but I guessed since the cables had no AWG rating on them). So the amp clipping could have damaged it, but I don't know why everything would work great for 5-7 minutes and then get more quiet after, or while driving have it not happen at all.
I spoke with XStatic specialists and a reputable car audio store near me multiple times and they believe it is either my amp, or the sub line out port on my head unit.
I am out of ideas of where this could be coming from. If anyone could help me that would be greatly appreciated.
