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  Alpine KTP-445U Head Unit Power Pack 45W x 4 Car A
 
Enter the Crutchfield Research Centre & Video
Upgrade any car radio to 45 watts RMS X 4

104 people say
List Price: CAD $199.99

In Stock
Product Code: 500KTP445U


Overview Details Accessories
 
Alpine Authorized Online Dealer

More power, less hassle

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.

The KTP-445U will work with just about any car stereo, but it's not a plug-and-play installation — you'll have to wire it into your system. If your car receiver's power circuit is protected by a 15-amp or larger fuse (check your fuse box or owner's manual), you can tap into it to power your KTP-445U. Otherwise, you'll have to run a power wire to the battery. Be sure to add a 15-amp inline fuse as close to the battery as possible.

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.

Important Note: The KTP-445U Power Pack won't work in a system with an active factory amplifier. You'll have to bypass the factory amp if you want to upgrade your power with the KTP-445U, and we don't recommend using this Alpine amp to replace a factory amp with more than 4 channels. Please contact an Advisor at 1-800-297-9469 to check compatibility if you have any questions.

 
Highlights:
   » compact Class D amplifier for factory and aftermarket receivers
   » universal plug lets you send signal from RCA outputs or speaker-level wiring
   » runs off same power circuit as receiver (must be 15-amp or more)
   » 4-channel amplifier
   » 45 watts RMS x 4 at 4 ohms (CEA-2006 compliant)
   » built-in high-pass crossover (selectable 60, 80, 120 Hz at 12 dB/octave)
   » selectable gain switch (high/low) and switchable 2- or 4-channel operation
   » fuse: 15A
   » dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
   » warranty: 1 year

Alpine KTP-445U Power Pack Reviews

104 people say

 
Big bang in tiny package September-17-14
Reviewer: phaelax from ohio  
My application was a little different than the average user as the car was a '73 Duster.   I did not want to cut into the factory dash to fit an aftermarket radio nor have one hang from under the dash like you commonly see in old cars.  This tiny amp easily fits behind the dash.  I made a custom harness to use an 1/8" audio jack for the input source which I fit into a pre-existing hole where an old radio knob used to be.  Using my iphone for music instead of a head unit, this little amp is enough to power the rear 6x9s loud enough (and without distortion) to actually hear the music over the thundering rumble of the 440 block, which is nice on longer highway trips.  

Only thing I wish it had was an external line to control the volume rather than the dials on the amp itself. I'd rather be able to adjust the volume from a knob than on my phone.


 
Super power pack September-12-14
Reviewer: Bob L from Cranston, RI  
Unbelievable compliment to any stereo. I put this in my Harley Road Glide. Had Kenwood stereo with Kicker speakers installed without it at first and when riding I had to crank the stereo. after about 15 minutes, the speakers started to cut out. I thought I had inferior speakers. After talking to awesome tech support, they told me to buy this amp. the radio could not handle being maxed out that long. Once installed, which was super easy, I was blown away with the results. I would not install another radio without this must needed add on. Again, cudos for tech support


 
September-05-14
Reviewer: Joe from Wesley Chapel FL  
I installed this in a F-150 Out standing little amp. Easy to wire up and fit right behind my H/U with some zip ties no crazy amp wiring . If you are like me and are looking for great sound quality this power pack will bring out every little sound. Here is a tip the RCA jacks are female and if you get a new H/U like I did the jacks on the back of that are female get some adaptors when you order or just get some RCA wire because the one that come with it are only about 4 inches. I was in the middle of the job I just cut off the RCA and just wired it up to the harness.


 
Alpine KTP-445U Power Pack August-24-14
Reviewer: James from Hilton Head Island, SC  
It is an okay amp and does what it promises. You can definitely hear the power boost right away. So that's good and don't mistake me. But it leaves me a little wanting as it quickly reaches max gain without distortion. Then the sounds become tinny and you have to back off. I've had mine about 3 weeks. I want a full 75 RMS and this isn't enough for me. And it doesn't' generate more power at 2 ohms.  It's all right if you know you aren't going to want more, but I'm going to be ditching mine and getting a regular 75 watt per channel 4 channel AB amp for about a Franklin more.  It is supposed to fit up under behind your head unit or someplace else close, and it does, barely finds enough room there. It attaches easily to the cigarette lighter power and ground in the dash with a tap connector. That's the best part.  Also, I've had my two regular AB Alpine V12 amps go out on me recently. So I'm not too high on Alpine right now.


 
a little more juice August-12-14
Reviewer: Stan from michigan  
I have added aftermarket speakera to my doors and dash and they were sucking the juice right out of my cd player. i hooked this little guy up and and now it sounds better than ever and has power left over.


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Alpine KTP-445U Power Pack CAD $199.99