I have a Zeus ZX6000 Amp, when listening at normal levels everything sounds fine. When I turn up the volume, I get a loud humming sound that drowns out the music. The only way to recover is to turn the deck off and power on again. I disconnected the amp and turned up the volume with no problem. Any solutions?
Replies (6)
tccolem on 03/27/2008 10:23:57
2000 540i BMW
kirchatndftbl on 03/27/2008 12:30:34
try checking ur ground wire on the amp and the deck
tccolem on 03/27/2008 12:50:24
the deck is still factory so it should be ok. I've wired the ground directly to an unpainted portion of the frame.
swez on 03/28/2008 05:07:42
How are you getting your audio signals from the HU into this amp?
1. RCA's from HU to amp
2. Using speaker line taps to amp input with RCA's? (Unshielded wire)
Swez
tccolem on 03/29/2008 16:24:26
Yes, but using pre-amp level wire taps to RCA.
Good point! I went to Radio Shack and bought their premium RCA cables. The humming is gone, however now when I turn up the volume I loss sound from the amp, However the amp is still on. When I turn the HU off then back on again the amp plays again
swez on 03/29/2008 17:32:39
OK, the hum was probably due to poor cable shielding. Also, if the amp gain is not set correctly, the amp may go into protect mode from improper gain settings and will reset when you turn off the HU and dial back on the HU volume control.
Here, you may need to adjust the amp gain setting, (Less sensitive) to keep things going at high listening levels. In most cases, the best place to start is the center point of the gain dial adjustment which is about 2.0 volts. Depending on how much signal voltage the amp is getting at the RCA inputs, you can adjust from there.
The goal is to have your HU at roughly 80% of max volume, (Clear and clean Mids/Highs) and then adjust sub amp gain settings to give clean bass and the amp does not overload and shut down. If the bass begins to sound un-natural, distorted, sloppy or raspy, back off on the amp gain setting until it sounds clean and full.
FYI: If the sub amp gain is set incorrectly or the ohmic load to the amp is not matched to the amp, this will cause the amp to shut off as mentioned.
Got all that?
Swez
Replies (6)
tccolem on 03/27/2008 10:23:57
2000 540i BMW
kirchatndftbl on 03/27/2008 12:30:34
try checking ur ground wire on the amp and the deck
tccolem on 03/27/2008 12:50:24
the deck is still factory so it should be ok. I've wired the ground directly to an unpainted portion of the frame.
swez on 03/28/2008 05:07:42
How are you getting your audio signals from the HU into this amp?
1. RCA's from HU to amp
2. Using speaker line taps to amp input with RCA's? (Unshielded wire)
Swez
tccolem on 03/29/2008 16:24:26
Yes, but using pre-amp level wire taps to RCA.
Good point! I went to Radio Shack and bought their premium RCA cables. The humming is gone, however now when I turn up the volume I loss sound from the amp, However the amp is still on. When I turn the HU off then back on again the amp plays again
swez on 03/29/2008 17:32:39
OK, the hum was probably due to poor cable shielding. Also, if the amp gain is not set correctly, the amp may go into protect mode from improper gain settings and will reset when you turn off the HU and dial back on the HU volume control.
Here, you may need to adjust the amp gain setting, (Less sensitive) to keep things going at high listening levels. In most cases, the best place to start is the center point of the gain dial adjustment which is about 2.0 volts. Depending on how much signal voltage the amp is getting at the RCA inputs, you can adjust from there.
The goal is to have your HU at roughly 80% of max volume, (Clear and clean Mids/Highs) and then adjust sub amp gain settings to give clean bass and the amp does not overload and shut down. If the bass begins to sound un-natural, distorted, sloppy or raspy, back off on the amp gain setting until it sounds clean and full.
FYI: If the sub amp gain is set incorrectly or the ohmic load to the amp is not matched to the amp, this will cause the amp to shut off as mentioned.
Got all that?
Swez
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