Gaffer
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Hi guys, think I might need some help with this one.
I have an RNS-E with satnav and the Bose 10spkr option.
Unfortunately, the Bose sub sounds a bit poor so I've added an Alpine SWE-815 to the boot:
I sent the supplied power lead through the grommet under the scuttle above the fuse box as everyone does, then ran it under the side sills to the boot, then into the Alpine sub's amp.
It is grounded to the panel in the bottom right of the boot as you look in (looks like a big plate bolted to the base of the boot). This was ground with the dremmel to expose bare metal on the base, screw and earth lead's "blade". Then tightened up.
Then onto the Bose amp, I disconnected the plug and according to this diagram, wired in the phono input and remote on to the Alpine sub:
Alpine sub turns on and works as required and adds useful bass to the mediocre Bose system.
HOWEVER
There is now an extremely loud, high pitched whine in ALL the speakers when the engine is on (increased with speed).
Whine disappears when engine shut off, but still have new loud clicks and pops as other things in the car turn on and off.
Disconnecting the sub (removing it's power lead and it's fuse) AND disconnecting the earth lead to it (so Alpine sub is now not powered at all) does not improve the problem.
Because this therefore happens whether the new Alpine sub power lead is connected or disconnected makes me think it isn't a problem in how I've routed the power lead.
Because this also still happens whether the new sub earth lead is connected or disconnected makes me think it isn't a poor Alpine ground problem.
Basically, removing the amps power path doesn't "cure" the problem.
This makes me think that it's something to do with either how I've tapped into the Bose harness or maybe how I reseated it?
Cue, reseating the plug and ..........nothing changed.
The phono lead is a cheapo job that you get in any shop (I just wanted to see it worked first so tried with this). I'm thinking that the phonos, as well as sending the line-in info to the new Alpine sub, are maybe also sending interference back to the Bose amp?
I'll try "proper" phonos on Monday bank holiday but wanted to check I'm on the right path first.
Finally, could this be a simple case of a ground loop created by the phono's (which is why disconnecting the Alpine's power and earth don't change anything, as long as the phono's are connected, the stray current is going through them to cause the whine?)
In which case would a ground loop isolator on the phono's going to the Alpine sub fix the problem?
Basically, apart from the new Power, Earth and Harness tap-offs (line outs and remote) I haven't altered anything else.....so sorry for all the Q's, but I can't for the life of me figure out what I've done wrong here (all my previous car installs were done from scratch and replacing the whole system, this is one of the few times I've tried to "piggy back" into an OEM system).
....any help would be appreciated
I have an RNS-E with satnav and the Bose 10spkr option.
Unfortunately, the Bose sub sounds a bit poor so I've added an Alpine SWE-815 to the boot:
I sent the supplied power lead through the grommet under the scuttle above the fuse box as everyone does, then ran it under the side sills to the boot, then into the Alpine sub's amp.
It is grounded to the panel in the bottom right of the boot as you look in (looks like a big plate bolted to the base of the boot). This was ground with the dremmel to expose bare metal on the base, screw and earth lead's "blade". Then tightened up.
Then onto the Bose amp, I disconnected the plug and according to this diagram, wired in the phono input and remote on to the Alpine sub:
Alpine sub turns on and works as required and adds useful bass to the mediocre Bose system.
HOWEVER
There is now an extremely loud, high pitched whine in ALL the speakers when the engine is on (increased with speed).
Whine disappears when engine shut off, but still have new loud clicks and pops as other things in the car turn on and off.
Disconnecting the sub (removing it's power lead and it's fuse) AND disconnecting the earth lead to it (so Alpine sub is now not powered at all) does not improve the problem.
Because this therefore happens whether the new Alpine sub power lead is connected or disconnected makes me think it isn't a problem in how I've routed the power lead.
Because this also still happens whether the new sub earth lead is connected or disconnected makes me think it isn't a poor Alpine ground problem.
Basically, removing the amps power path doesn't "cure" the problem.
This makes me think that it's something to do with either how I've tapped into the Bose harness or maybe how I reseated it?
Cue, reseating the plug and ..........nothing changed.
The phono lead is a cheapo job that you get in any shop (I just wanted to see it worked first so tried with this). I'm thinking that the phonos, as well as sending the line-in info to the new Alpine sub, are maybe also sending interference back to the Bose amp?
I'll try "proper" phonos on Monday bank holiday but wanted to check I'm on the right path first.
Finally, could this be a simple case of a ground loop created by the phono's (which is why disconnecting the Alpine's power and earth don't change anything, as long as the phono's are connected, the stray current is going through them to cause the whine?)
In which case would a ground loop isolator on the phono's going to the Alpine sub fix the problem?
Basically, apart from the new Power, Earth and Harness tap-offs (line outs and remote) I haven't altered anything else.....so sorry for all the Q's, but I can't for the life of me figure out what I've done wrong here (all my previous car installs were done from scratch and replacing the whole system, this is one of the few times I've tried to "piggy back" into an OEM system).
....any help would be appreciated
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