Soundstream PN4.520D FM EMI reduction
Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
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From: East of the Sun, West of the Moon
Looks like this weekend before I get to all of this. One thing to note is that i am not using the RCA connections, I am using the other white wire harness that plugs into the amp. This harness also has a "ground" wire which I have hooked up to the aux ground on the headlight harness. Could this set up be an issue? I'm only running one pair of 651's with this amp...
Would RCA cords help?
Would removing the little harness ground help? Or be a bad idea?
Would RCA cords help?
Would removing the little harness ground help? Or be a bad idea?
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Intermediate
Joined: Aug 2012
Posts: 36
Likes: 0
From: Austin, Texas
Looks like this weekend before I get to all of this. One thing to note is that i am not using the RCA connections, I am using the other white wire harness that plugs into the amp. This harness also has a "ground" wire which I have hooked up to the aux ground on the headlight harness. Could this set up be an issue? I'm only running one pair of 651's with this amp...
Would RCA cords help?
Would removing the little harness ground help? Or be a bad idea?
Would RCA cords help?
Would removing the little harness ground help? Or be a bad idea?
I can make no promises that any of this will show a significant improvement. I have not tested the effectiveness of these additional steps. From what I've seen most of the noise is on the power lines, but there is some on the speaker wires as well. The chassis ground bit is just good design process. Again, it may or may not help much. It's just the stuff that I'd do if I wanted to go all out to reduce the noise level. There's a fair chance that some amps just make too much noise to damp out with this approach.
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Intermediate
Joined: Aug 2012
Posts: 36
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From: Austin, Texas
I stand corrected... UltraNutZ is absolutely the authority here.
Advanced
Joined: May 2012
Posts: 79
Likes: 2
From: Auburn, AL
When you say "2 wraps in the same direction"...
does that mean the direction of the current flow through the wires should be in the same direction as it goes through the core?
Battery--->Power Wire--->Core(in left, out right)--->Amp In--->Ground out--->Ground Wire--->Core (in left, out right)--->Frame
Or does the "same direction" mean the relative direction the wires are running to the amp?
Battery---->..... ---->Amp
............... Core.............
Frame ---->..... ---->Amp
does that mean the direction of the current flow through the wires should be in the same direction as it goes through the core?
Battery--->Power Wire--->Core(in left, out right)--->Amp In--->Ground out--->Ground Wire--->Core (in left, out right)--->Frame
Or does the "same direction" mean the relative direction the wires are running to the amp?
Battery---->..... ---->Amp
............... Core.............
Frame ---->..... ---->Amp
Last edited by WDE; Nov 15, 2013 at 03:23 AM.
Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
I don't use FM so it never bothered me nor did I realize the interference until it was brought to my attention here.
But as Pioneer74 stated, it doesn't matter, nothing seems to help. Just is what it is with Class D amps.
But as Pioneer74 stated, it doesn't matter, nothing seems to help. Just is what it is with Class D amps.
Outstanding HDF Member
Joined: Mar 2012
Posts: 2,843
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From: Michigan
Exactly. The Soundstream 4.520 is a very powerful and inexpensive amp, but there are tradeoffs. You have to expect that you will lose FM and WB reception. There is no way around it.
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