Alpine - Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter - Black
User rating, 4.7 out of 5 stars with 649 reviews.
4.7(649 Reviews)- 38 Answered Questions
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Description
Features
Geek Squad® installation
is strongly recommended for this product. Please visit your local Best Buy store for details.
Handles up to 45W RMS (continuous) @ 4 ohms or 2 ohms
For powerful sound. Up to 90W continuous bridged.
12dB/Oct high-pass filter
Along with variable gain ensures flexible operation.
4 ohms bridged impedance
Conducts power evenly to keep the speaker at an appropriate level.
RCA and auto sensing speaker-level connectors
Enable simple installation.
What's Included
- Alpine Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter
- Wiring harness with RCA connectors
- Owner's manual
Key Specs
- Voice Assistant Built-inNo
- Continuous Watts x Channel @ Ohms45W x 4 x 2
- Maximum Watts x Channel @ Ohms45W x 4 x 4
- Amplifier ClassD
- Number Of Channels4
- Bass BoostNone
- BridgeableYes
- Low-Pass CrossoverNone
- High-Pass CrossoverVariable
- Speaker-Level InputsYes
Compatibility
- Voice Assistant Built-inNo
General
- Product NamePower Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter
- BrandAlpine
- Mounting Hardware IncludedYes
- Model NumberKTP-445U
- SeriesPower Pack
- ColorBlack
- Color CategoryBlack
Audio Power
- Continuous Watts x Channel @ Ohms45W x 4 x 2
- Maximum Watts x Channel @ Ohms45W x 4 x 4
- Watts Per Channel Maximum45 watts
- Amplifier ClassD
Audio
- Number Of Channels4
- Minimum Frequency Response20 hertz
- Maximum Frequency Response20 kilohertz
- Total Harmonic Distortion0.01 percent
- Signal-to-Noise Ratio (SNR)80 decibels
- Bass BoostNone
Features
- BridgeableYes
- Low-Pass CrossoverNone
- High-Pass CrossoverVariable
- MOSFET Power SupplyYes
- Bluetooth EnabledNo
- Remote Control IncludedNo
- MarineNo
- Fan CooledNo
Input
- Line-Level InputsYes
- Speaker-Level InputsYes
Output
- Preamp OutputsNo
Dimension
- Product Height1.5 inches
- Product Width2.63 inches
- Product Depth1.5 inches
- Product Weight3.3 pounds
Warranty
- Manufacturer's Warranty - Parts1 year
- Manufacturer's Warranty - Labor1 year
Other
- UPC793276011916
Customer rating
Rating 4.7 out of 5 stars with 649 reviews
(649 Reviews)Customer images
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Rating 5 out of 5 stars with 1 review
Great Amp
|Posted .My 2016 Chevy Colorado came equipped with MyLink. But Chevy used pitiful amplification from the head unit. 2nd row door speakers were of no effect. Adding this Kenwood amp and a set of 6.5 Infinity speakers to the 2nd row has brought the truck back from stereo purgatory. The Best Buy techs went the extra mile and helped tune the bass crossover and overall amp output to fit the cabin. THEIR HELP WAS INDISPENSABLE. This is the aftermarket answer for making the non Bose MyLink worth keeping.
I would recommend this to a friendFeatures
Quality5 out of 5Value5 out of 5Ease of Use4 out of 5Pros mentioned:Compact, Sound qualityCons mentioned:SafetyRating 4 out of 5 stars with 1 review
Great Little Amp!
|Posted .Features
Quality5 out of 5Value5 out of 5Ease of Use4 out of 5Pros mentioned:Compact, Sound qualityCons mentioned:SafetyGreat little amp. Got it for my '78 F150 to run door speakers & 6x9s behind seat. Loud, clear sound. Nice compact size. I have it temporarily mounted with zip ties in the pics. (The actual mounting brackets are missing but that is Best Buy's fault) Plan to remount it more securely later. Only reason I didn't give it 5 stars is the location of the adjustments, gain, etc.
Features
Quality5 out of 5Value5 out of 5Ease of Use4 out of 5I would recommend this to a friendFeatures
Quality4 out of 5Value5 out of 5Ease of Use5 out of 5Pros mentioned:Power, Sound qualityRating 4 out of 5 stars with 1 review
Great for my motorcycle
|Posted .Owned for 3 weeks when reviewed.Features
Quality4 out of 5Value5 out of 5Ease of Use5 out of 5Pros mentioned:Power, Sound qualityUsed this for my Victory Cross Country Touring. I upgraded the speakers and the factory amp struggled to keep up. I grabbed this amp and it pushed my upgraded speakers with no distortion. My speakers are currently the Kicker CS line. This amp offers powerful sound in a very small footprint.
Features
Quality4 out of 5Value5 out of 5Ease of Use5 out of 5I would recommend this to a friendFeatures
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Pros mentioned:Sound qualityRating 5 out of 5 stars with 1 review
This KTP-445U is geat
|Posted .Owned for less than 1 week when reviewed.Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Pros mentioned:Sound qualityI got this for my 17 Ford Explorer because it doesn't have the premium sound system. I did a lot of research and also got the iDatalink DFO2 T-Harness so I didn't have to cut any wires and everything matched up perfectly simply plug and play. I did upgrade the door speakers to the kicker 6x9s which I had to find a special universal bracket for because the one that designed for it was to thick and I couldn't put my door panel back on and 6.5 (speaker bracket fits perfect) which gave me more bass and treble. This Alpine KTP-445U mini amp enhanced the sound did fit between my factory 8.4in screen and my glovebox.
Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5I would recommend this to a friendFeatures
Quality4 out of 5Value5 out of 5Ease of Use3 out of 5Rating 5 out of 5 stars with 1 review
Little thing Pack a Punch
|Posted .Owned for 3 weeks when reviewed.Features
Quality4 out of 5Value5 out of 5Ease of Use3 out of 5This was very small and weak looking. I was skeptical at best that I would like it even in the slightest. I have a 800 Watt amp for my 2x12 Kicker Comp Subs. This little Alpine Power Pack overpowers the sub like they aren't even there when they are hitting pretty hard. Made me upgrade my entire system just to hear the subs hit. This thing packs such a punch that if you ARE going to install this, I would say to plan on spending a bunch of money on upgrades such as "High output alternator to run the watts that need to put out to a sub amp to keep up with this little monster of a power pack, Battery Cable 4 Gauge long enough to charge the battery, Upgrade Amp for subs to be able to even hear the subs, and then finally sound proofing because now you've made your car into a concert." So yes, This power pack will leave much on the table to be wanted. If you install it, Know that you will want everything else to sound just as punchy as this Power Pack.
I would recommend this to a friendFeatures
Quality4 out of 5Value5 out of 5Ease of Use3 out of 5Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Rating 5 out of 5 stars with 1 review
Love this thing
|Posted .Owned for 3 weeks when reviewed.Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Love this thing , made a big difference powering my pioneer door speakers , soldered all the wires and used shrink wrap , and the installation was easy and no modifications needed , sitting right behind the stereo , I have a great sound and didn’t take any extra room
I would recommend this to a friendFeatures
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5Rating 5 out of 5 stars with 1 review
Clarity and Detail redefined!!
|Posted .Owned for 1 week when reviewed.Features
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5I bought this amp to power 2 pairs of Kicker KS 6X9 speakers in the doors of my 2018 Jeep Renegade. It made a huge difference in not only the volume but in the clarity and detail of the music. Kudos to the auto techs at BestBuy in Forsyth, IL. Josh and Rich are awesome!!
I would recommend this to a friendFeatures
Quality5 out of 5Value5 out of 5Ease of Use5 out of 5- Pros mentioned:Price, Sound quality
Rating 5 out of 5 stars with 1 review
Awesome amp
|Posted .Pros mentioned:Price, Sound qualityI like the alpine amp is small and best sound and price
I would recommend this to a friend
Q: QuestionIf speakers (like JBL GX963) are rated for higher amps than the amp, will that result in more distortion at higher volumes? Would I be better off with a larger amp?
Asked by Ross.
- A:Answer This amp has real power I turned it down so as not to blow my kicker door speakers that can handle much more power.
Answered by TLee
Q: QuestionCan this amp be mounted in the fairing on a Harley Davidson?
Asked by Bdogg.
- A:Answer Yes it can. It is mounted in mine and it sounds great.
Answered by Jerry
Q: Questionhow easy would it be to jump this off my 600w amp and hook 2 6x9s to this amp? i have a bigger wire so plenty of power.
Asked by shawn.
- A:Answer Many people focus too much attention on the rear speakers. Rear speakers are for "rear fill". If your front speakers are able to create a good front stage and proper imaging AND be able to play clearly at high volume levels to balance out the subs, rear speakers are usually not necessary. Take out the 6X9s that reside in your rear deck. If you feel the need to put rear speakers later on, go with something small like a 5.25 in a coax.
Answered by TheOGofLogic
Q: QuestionCan this amp be bridged at 2 ohms for 90 watts rms?
Asked by Anonymous.
- A:Answer Sure can. You don't quite see 90wrms out of each channel, but 75-80 is not unheard of. Works great to power a beefier pair of speakers without going into a full 4ch amp
Answered by StallationGuy
Q: QuestionIs this amp compatible with a 2013 ram 1500 with a factory radio
Asked by Hawaii.
- A:Answer I saw someone reviewed this amp on YouTube and said the ALPINE KTP-445U the U stands for universal and that will allow connections with factory amps..I'm lead to believe the A is for Alpine units. Cheers!
Answered by JoeCader
Q: QuestionIs this amp bridgeable making it a two channel amp with more power?
Asked by Hollie.
- A:Answer Yes you can bridge this amp to push 90w rms @ 2 ohms
Answered by ShawnS
Q: QuestionWhat are the actual dimensions of this amp? The listing does not look correct.
Asked by BR549.
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