Super easy to install. Fit right in behind the glove box of my 2003 WRX, longest part of the install was screwing the glove box back on. I wasn't expecting a big difference, just wanted a little extra juice for my speakers. Have 5 1/4" Infinity reference in the front, 4" in the back, with an Alpine CDA-9886 head unit. When my sub is up (12" Kicker L5 with 300 RMS mono alpine amp), the speakers would be drowned out and distorted. Was mostly clear to volume level 18, although some songs would still distort. With the amp installed I can turn it up to 23 with no distortion, basically too loud to even listen to. Down around 18, where its comfortable but loud, the speakers don't distort at all, no matter what I'm listening to. And I can actually hear the music with my sub turned up all the way. Ordered the "open box" for $13 less and it arrived in brand new condition. Didn't need to call them with this order, but the customer service center is awesome.

first of all, crutchfield and everyone working their are great. i had alot of questions and they answered them all. had some problems and they went above and beyond. the amp does boost power. how huch? i'm never happy but does make a difference.

I have this installed in my BMW 330i with lots and lots of customization. The amp is almost perfect size for most installations, however, bmw spares no space when putting cars together. I have this installed above my fuse box behind the glove box. The wires are extra long which gives alot of options for placement. Installation is literally a snap(plug one end into your alpine HU and the other in adapter that came with the HU). At low to mid level volume this thing sounds amazing for the price. I have the 4 focal tweeters paralleled with my 4 mid's so each component is not getting the power needed to maximize sound. Eventually I plan to run another outboard amp to the tweeter's and run the power pack to only the 4 mid's. I listen to alot of rock and country so I like punchy bass, guitars, keyboards, and all the instrumental highs associated with tweeters and components. Although I have this pack essentally running to 8 speakers it still manages to push them close to their max. The Focal tweeters coming off this thing sound ungodly.

Alpine CDE-123 HU, 4- Alpine type S 4" in front doors and rear deck, 4- Focal TNI 1.5 tweeters in front cabin and rear deck, 2- Earthquake SWS 8" under each front seat, 2- type r 4ohm dvc 10's in custom closed box with about .85 cu ft per sub. in the trunk 1- Fosgate T1500 amp running to the type r's paralled at 2ohms 1- PDX 2.150 running to two sws earthquake 8" at 150x1 at 4ohms a piece

works great for the system and was quick to install

Adds a nice punch to the system. Easy install with Alpine head unit.

I installed the alpine power pack when I installed my w-910 head unit. Never hear the head without the powerpack, but I am quite sure there is no way it would sound as good and loud as with the pack. I barely ever go above half volume and its loud enough I can sing and no one can hear me over the music, which is a good thing. bottom line is, if u like music, u need this power pack with your head unit.

Alpine really hit a home run with this baby. I recently decided to do a complete audio install in my 08 civic coupe, and planned on buying 2 amps. One for the sub and one for the other 4 speakers. Im so glad that the Crutchfield advisor told me about this power pack. Its super easy to install and gives you just about as much power as an average external amp minus the extra wiring and money. Im still amazed about how good my 4 Boston Acoustic speakers sound with this powering them. This is a must have for anyone looking to build a modest stereo system!

I have a '08 GMC Sierra and 2 of my factory speakers had blown. I went with new Kenwood KFC-X183C all the way around (worth looking into!) I asked if it were possible to wire this amp into my factory deck because i did not want to spend the money on an after market stereo. They said they would give it a shot and they were able to figure it out and mount it in the dash so it is not visible. My truck now has great sound quality and no visible signs of upgrades. If you are looking to step up your sound without going all out i highly recommend going the route i did.

Overhauling my cars audio system has been a pain. It even got to the point where I was longing for my factory speakers with an aftermarket HU set up. I knew I was going to need an amp at some point to make any upgrades worth my while but all the lower end stuff I could afford was going to run around $420 after parts and labor got factored in and even then that would only leave me with 50 watts RMS per channel. On my current budget I couldn't justify spending that much.

I decided I would be better off getting an Alpine head unit with a power pack and I have to say the Power Pack has made a world of difference. The aftermarket Alpine coaxial 60 watt speakers I installed in my car have finally started performing up to their potential and made me realize why I tried to upgrade my speakers in the first place. The highs are cleaner and the Mid-Bass is not only louder but crystal clear as well. For the average listener that needs more power for their aftermarket speakers but can't break the bank for an amp this product is a no brainer.

I find it hard to believe that there is a better dollar for dollar value available in todays car audio market.

Improves clarity, doesn't crackle when I crank the volume even with the stock speakers. After installing aftermarket speakers I was blown away with the sound quality! So simple to hook this up, seriously the hardest part was applying double sided tape to secure it to the firewall.