This is exactly what I was expecting and afraid of when I was writing a response to this post:AppStar said:I just did the Aux input mod described here on the forums. The stereo is not as loud as before. With the volume turned all the way up it's apx at 50% than what it was before. Is this normal?
So I assume this bridging transformer will perform a similar task as bridging the output of an amp to combine 2 channels into 1? But, in this case, the 2 channels are really just 1 channel and the input + and - leads are inverse of one another, so the output of this bridging transformer would effectivlely be double of the input voltage of one of the input leads. Sound right?vlad_a said:
So this bridging transformer would actually go between the AUX device and the stock AMP. I thought it was to be used between the stock headunit and the stock amp.vlad_a said:No, it's not the same as the amp.
I think I found the right part I was looking for.
The idea is to isolate each channel from the AUX device. There might be an isolation device already available for the aftermarket audio.
Ignore the ground connector. It is for interferance issues.
What would need to be done is to connect (-) on the input of the transformer to the ground. (+) to the RCA output for each channel. That's why 2 transformers would be needed.
Now, the output +/- would go to the +/- wires for each channel on the OEM AMP input. A 4 wire switcher would need to be used to disconnect the stock stereo and connect the trasformer as the input device.
I hope that makes sence.
People, feel free to chime in. I'm just building theories here.
I'm not sure if that's what we need. If you think about it, even though the (+) and (-) lines coming out of the headunit both have signals, what matters is the voltage difference between these two lines. Just because one of them isn't constantly at 0volts, doesn't mean what the stock amp sees at its input is any different than a signal that has one of the leads constantly at 0volts.AppStar said:Anyhow I found a really cheap one if that's what we need... http://shop.store.yahoo.com/xmfanstore/grloisei.html
My instructions above have NOTHING to do with the AUX source ok? It is NOT ERRONEOUS and you are an asshole for putting it in BRIGHT RED LETTERS. I'm not here to compete to see who has the biggest car audio dick, I'm just trying to save the guy some money for something that he doesn't need. The original post was to rectify the decrease in volume of the HEAD UNIT due to SophieSleeps' insturctions. My solution works FINE to fix his problem and get the orginal sound volume back from his head unit. I actually did this on my car, it works.vlad_a said:^^^^
You're finally getting it.
It is not the OEM HU signal that needs to be converted, but the AUX output signal from Unbalanced to Balanced.
As I stated before, you can either convert it, or use 4 wire switch to connect (-) wires on the AMP input side to the ground.
Step #3 is erroneous because AUX device has Negative terminal same as the ground.
Why? Because it is unbalanced. That is why the either a conversion or 4 wire switch is needed.
Oh and the maturity level of putting stuff in bright red letters just to prove you have a bigger dick? Oh please, save it.....vlad_a said:Once again, the maturity level with name calling just shines through. :roll:
I see... put it back to the way it was before the MOD is a good advice to fix the problem. :roll:
No, I did not do this mod. I might do some experimenting of my own if I have spare time.
My car is partially taken apart. The whole OEM setup will be replaced with a custom design.