Join Date: Jul 2013
Location: Roseburg Oregon
First off I'm not an Audo pro or a know it all!!
Im just a dumb redneck that likes to learn and research things and do everything my self. Just passing along my findings.
No I have the fader is set equal front to rear. I will be moving it fully to the rear today and re measure it to see if it helps increase the signal output to the rear.
The Magnum head unit is only amplified on the front channels. To use the rear speakers you have to buy the rear saddle bag amplifier that mounts under the rear fender.
You are correct in theory about the amp gain. The problem I'm seeing on the Oscilloscope is that the signal is so weak (playing a 1k test tone) that I only get a slightly useable input signal to the amp when I get to about 25 on the volume.
My amplifier requires at least a (low of 200mv - 8v high) signal to work. Most quality aftermarket head units put out 5-8 volts cheaper ones only about 2v there is just a huge sound quality with the higher voltage.
No unfortunately there is no RCA's ( low level ) coming out of the stock head unit. Just the rear unamplified signal which in theory is the same thing if I solder RCA's onto the speaker wire, it is just too weak of a signal to propperly feed the amp hence the need for the line driver.
I think all Victory bikes work this way? The only amplified signal is the front speakers if you add a trunk or saddle bag speakers you have to purchase there little amp for the rear. The CC Tour comes with this secondary amp installed already. So with the rear signal you are getting an unfiltered unprocessed clean signal it's just too weak to propperly drive the amp to its full power cleanly!
2012 Vision - in process of converting to Cross Country rear end and bags
Lloyd's -Filter-Timing wheel-Adjustable Intake-Throttle ring
Home built 2 into 1 pipe with dummy pipe on left looks stock