Alpine KTP-445U Head Unit Power Pack 45W x 4 Car Amp

Product highlights

What's in the box

• Head Unit Power Pack 
• 15-amp ATM mini-blade fuse (installed) 
• 30" Power/speaker-output harness 
• 5.5" Speaker-level/low-level input harness (Turn-on lead is 40" long) 
• 2 Metal brackets 
• 4 Phillips/Hex-head mounting screws 
• 4 Wire-ties 
• Owner's Manual (English/ French/ Spanish) 
• Limited Warranty card 
• "Thank You" letter 

Written by Crutchfield's Zak Billmeier

Want a simple way to crank up the power of your receiver? Alpine's "Power Pack" amplifier increases your receiver's power output to 45 watts RMS by 4 channels. That's a big jump up from the 7-20 watts per channel typically put out by a car radio, and plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier. Best of all, this compact amplifier is so efficient you can often run it off the same circuit that powers your receiver. A universal plug lets you feed a signal via RCA outputs or speaker-level wiring.

You can install this compact amp behind most dashboards, but you'll need 4-channel patch cables to connect your car stereo to the amp's preamp inputs. You can also splice into your speaker wiring to get signal to the KTP-445U.

Installation Note: We recommend running a dedicated constant power wire to the battery for optimal performance from this Alpine amp — we offer an inexpensive wiring kit for this installation. This high-powered amp won't work in systems where an outboard factory amplifier is still active.