Excerpt: This amp has always performed ok. There's other amps in the market with a similar/identical footprint that output more usable power. The build quality is acceptable, but clearly not as nice as the comparable Kicker/Fosgate/JL amp.
Conclusion: Who wants another big ass amp in your trunk? I got this lil thing stuffed behind my dash and dude.. It pushed out a lot of power and uses stock electrical from head unit. It gets loud.. My speakers are 50watts rms and even they get over taxed at high volumes..
Conclusion: This was a great addition to my car, I was on the fence about getting it but now that I have it I wish I would have gotten it sooner. It is very easy to install the hardest part was finding a nice location to mount the unit. It did wonders for the sound quality in the car.
Conclusion: I recomend this amp for a bunch of reasons really but as far as power,build quality,etc. This thing rocks full range wise. I use these in many of my dc audio systems and yes, I kept the first one for myself.
Conclusion: I like it....I thought it didn't work at first. ...but I had the defeat turned off on the stereo ....I didn't know I had to do that ...but I'm happy with the product...alpine has a lot of good products
Summary: This product works perfect. I have it paired with my alpine head unit and it really makes my aftermarket door speakers shine. So much more clear at louder volumes and a small increase in mid bass as well. pair with any aftermarket door speakers that can handle 40-50 watts rms and your golden.
Pros: quick and easy install. very powerful for how small it is
Cons: Due to limited area behind stereo unit i had to mount it in the glove box. thus it takes up half of my glove box
I have a alpine 9425 &6×9 Rs nothing but awsome,Now its time to upgrad
23 November 2015
Summary: I have loved my 9428 and 6×9 for about 10 yes. Time to HD149BT & 6×9R the processors are top notch have to get more, but Im on ssi so 1 peace at a time. Please never change. I will only buy Alpint. Thank you. Always wanted you cence I was a young boy. Thanks for all the great music.
Pros: No cons,it is best audio I haver heard in my life,a please dont make to many childish changes, like flickering lights this is not a toy factory, you dont make toasters or disco balls,you have the best processor's in the business. Dont screw it up ,like Sony did I the mid 90's,they have there fing...
Cons: No cons even after all this time,time now for the hd149bt&hopefully a bit more.But no cons here. Thank you
Summary: Easy install, fit in glove box, 4 channel amp improved the output of the Pioneer 4100NEX head unit with RCA plugs. After setting the optimal level gain, the sound was full and rich. Using Kicker aftermarket in front and rear.
Pros: Ease of install. No need for separate power supply. Rich sound gains.