Most "good" dealers will turn on the rears and balance on an HK radio for free or cheap. At least the dealer I use does if you bought your bike there. If you just walk in off the street they charge $25. That's mostly for the hassle of opening up your fairing. The actual upload takes about a minute to do.

 

Here's what I understood:
1. Rear speakers output should be hot, dealer's flash is needed only for fader to show up on radio, and it's done behind the side cover, not behind the fairing.
2. IronCross mod only add pre-amp level, it does not cut out OEM speaker level. Matter of fact, OEM front speaker output still works, that's what I'm using to get signal to CVO amp underneath tourpak.
3. Someone mentioned on a SG (only?), rear speakers output has to be "turn on" by dealer, you might be onto something, I'll check with dealer.

Thanks all for your feedback so far.

 

I just called my dealer.... he said the flash turns on the fader....... and that the fader is set to full front by default. So even though the rear speakers are "hot" they are turned all the way down.

And you're right about the side cover being the access point for the flash.

 

I've tried amping (word?) the front and using just radio power for the rear speakers, can barely hear them while sitting on bike, let alone riding.

If you want to fader to work, you'll want to look into a 4 ch amp, with inputs from front and rear, and dealer flash. The fader won't work without this step. If you do not need the fader, you can just wire up the 2 rear speakers to the same amp, in series if the speakers (all four) are 2 ohm, or parallel if the speakers are 4 ohm.

 

According to the wiring diagram in service manual, the switch goes after the speaker level output from the radio, which tends to indicate that it's not needed in my application.

 

Thank you sir, you might be onto what I need to do here.

Damn! Has to wait till Spring, then. Bike's apart and is too damn cold outside....

 

Give Tony a call at Iron Cross Audio. He knows way more about the HK, fader, HK amp, etc. than any dealer. He'll have the answers you need.

Carl

 

Thanks for all the info guys. Looks like I'll be selling my J&M amp and getting a 4 channel one.

 

As mentioned previously, call Tony at Iron Cross Audio; knows more about the HK system than anyone outside the MOCO, and very helpful.

Carl

 

The rear speaker outputs from the radio will not be active if the HK amp is in the circuit. The CAN Data Bus will shut down the rear output.

Without the HK amp in the circuit, the rear speaker outputs are always active. If the fader is not flashe on, the front, rear outputs default to a 50 / 50 split (it does not default to full forward)

The dealer flash will only activate the fader

With the HK amp in the system, the fader will default to the amp.

Hope this helps