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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

111 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

111 people say

 
Nice Little Unit but Short on Help December-14-14
Reviewer: SYates from Orlando, FL  
I bought a 2014 Accord Sport with the understanding it had a basic head unit and low end speakers. I started by upgrading to some Blaupunkt Blue Magic speakers but the head unit is so bad, it could not push any sound through the speakers so I did some research and landed on this little unit.  

I will say I had some trouble with the settings. For some reason, I have to turn the gain completely off because otherwise it will cause the amp to kind surge through the speakers and the whole car vibrates. It took me some time to figure that out and is really the only reason I dropped a star on it. I am no stereo expert but I am no novice either so I was surprised at how little information there was available to help me troubleshoot. Thankfully the staff at Crutchfield was patient with my questions.  

The speakers sound great and it still gets plenty loud. I will not win any car stereo competitions, but it is so much better than the factory stereo and I am enjoying my music one again!


 
Great little amp for the price December-09-14
Reviewer: xJoeMama78 from Chandler, AZ  
I purchased this amp to power a pair of Focal 165VRs in a 2015 Forester. I wanted to keep the system upgrades simple and had heard that the power wire to the factory head unit was sufficient to power this amp. I wasn't looking for the ability to play music at really high volumes, but just wanted to  provide the Focals with more than factory head unit power to increase clarity and for it to be audible with all of the windows down and the moonroof open while on the highway.  

This amp delivered everything it promised. It is small enough to fit behind the dash and the head unit power and ground were sufficient so I did not need to run a separate power wire. My head unit does not have RCA outputs and I did not want to cut off the female RCA connectors from the Alpine harness so I simply added male RCA connectors to the front speaker outputs from the head unit. I followed the instructions to set the amp into 2 channel mode and connected the appropriate amp speaker outputs to run the speakers bridged. The instructions were clear and it was easy to install, setup, and tune.  

Overall the amp sounds great. It is not going to be as clean or loud as a more expensive, high end amp, but for the price it is great. Now volume level 10 on the head unit is louder than it used to be at volume level 30. Volume level 10 is sufficient to hear music on the highway with all of the windows open. The amp distorts at higher volume levels but only after the volume is too loud to be comfortable.


 
December-03-14
Reviewer: Cliff from Arizona  
Compact power pack. Easy to mount under the dash


 
Powerful November-24-14
Reviewer: Anonymous person from Bardstown, KY  
This little box has some kick.  I have it on 2 6x8's and 2 6" I think in my Ram.   Oops...blew one of the rears.  Looks like I'll have to replace soon because the rattle is nerve wracking.  I only have the gain at half or barely past...I guess I need to make sure they can handle it.


 
love it, exactly what I needed, but READ MY CONs November-10-14
Reviewer: tom from Denver, CO  
Great little amp, not too difficult to install, makes a noticeable improvement in the sound quality of my aftermarket speakers.  Read my comment in the Cons. I would actually give this amp 5 stars, but I want to draw attention to this error.


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Alpine KTP-445U Power Pack CAD $199.99