I converted the lowers in the front (option 2) & routed the power from the head unit to the rears -- it sounds incredible. Worth every penny, and anybody that hears the stereo can not believe it's coming from a bike.

Here’s the bad news first; your Screaming Eagle edition Ultra comes with the OEM Tour-Pak amplifier. This makes removing your Tour-Pak and speakers difficult at best, and if not done properly can disable your audio system until you put everything back. If you want to be able to quickly remove the Tour-Pak, the first thing to do is remove the amp and it’s harness from the bike entirely.
Now the good news; With our amplifier running your speakers, you can disconnect them from the amp at any time without losing the fronts, or harming anything in any way. This makes our amplifier system the perfect choice for quick-disconnect Tour-Paks. Here’s the system we recommend for your ’08 FLHTCUSE3:
PSC 4CH Amplifier Driving 4 Stock Speaker Locations
1 x PSC3004 PSC Series 300W (4x75) Amplifier - $999.95
1 x CX504-70 CX Series 4 Ohm Component Speakers - $229.95 (front fairing)
1 x BT504-50 BT Series 4 Ohm Performance Speakers - $109.95 (rear pods)
Another way to go would be doing 4 speakers up front, converting your lower glove boxes into speaker enclosures. With this setup, you’d leave your Tour-Pak speakers stock and connected to your radio like a stock Ultra:
PSC 4CH Amplifier Driving 4 Front Speakers
1 x PSC3004 PSC Series 300W (4x75) Amplifier - $999.95
2 x CX504-70 CX Series 4 Ohm Component Speakers - $229.95 each pair, $459.90 total (upper and lower front)
1 x GBV525 Lower Fairing Speaker Adapters (Vented) - $169.95
And last but not least, there’s the 2 channel upgrades as well. Again, both of these options assume you’re removing your Tour-Pak amplifier, and connecting your rear speakers back to the radio like a stock Ultra:
DCS 2CH Amplifier Driving 2 Speakers
1 x DCS1202 DCS Series 120W (2x60) Amplifier - $495.95
1 x SX504-60 SX Series 4 Ohm Component Speakers - $179.95 (front fairing)
- Or -
PSC 2CH Amplifier Driving 2 Speakers
1 x PSC1502 PSC Series 150W (2x75) Amplifier - $595.95
1 x CX504-70 CX Series 4 Ohm Component Speakers - $229.95 (front fairing)
The choice is yours. Hope this helps, just say the word if you have any questions, and thanks for your interest in Hawg Wired.
Mike