Alpine KTA-450 4-Channel Power Amplifier Pack

R. T.: Sounded great for a couple years and suddenly a channel went out. I thought maybe the pre amp on the head unit went bad. Switch everything around and definitely channel out. Luckily I bought the 3 year asurion warranty and it was still covered. They offered to repair and I sent it in but was informed it couldn’t be fixed and received a refund through Amazon as a gift card.

United States on Dec 02, 2023

Jeremy Anderson: Perfect for an easy, inexpensive improvement.

United States on Apr 28, 2023

Carlos R.: Es compacto y se adapta sin problemas a mi unidad ilx-650, sin embargo produce mucha estatica o ruido, no se si por su calidad en el cableado, ya que el cableado se ve de menor calidad que el de mi unidad principal de estereo, por otra parte se protege muy facil aparentemente se debe cablear directo a bateria para evitarlo, aunque se comente en varios canales que puede ser conectado a la corriente de la unidad principal si se cumple con el requisito de tener un fusible de 15a.

Mexico on Dec 26, 2022

Jesse emery: Easy to install they say you can use factory harness they recommend amp wire kit i installed amp wire kit my truck ran power through dash kit so I ran new speaker wire didn’t want to ruin metra unit

United States on Feb 28, 2022

Dru U.: Only reason I didn’t give it 5 stars is because it is really sensitive to noise. I tried everything to eliminate the background noise but I can’t seem to get rid of it. It’s not obtrusive or anything, so I just live with it.

United States on Aug 24, 2021

Robert WRobert W: Maybe I'm stupid or maybe someone at Alpine engineering gave the product design the go-ahead without watching a human interact with it. Either way if you've bought this and it sounds great but has zero bass or you're looking to buy it, keep an eye out for the switches on this thing.
There are six switches and they are numbered 1 to 6 and there's a lot of reference in the instructions to flipping them "up" or "down". Now, you might be tempted to turn this bad boy such that the numbers 1, 2, 3, 4, 5, 6 are upright and read left-to-right and think that flipping a switch upwards puts it in the "up" position. Wrong. That's down, you idiot. What were you thinking? Flip it back over so all the numbers are upside down and flip a switch upwards. There ya go. "Up".
Seems like maybe not that hard to put an "A" and "B" on the side of the switches and have the instructions reference those but this thinking is why I'm supposedly "not a good fit" at Alpine Inc.
Things might look good when you get it from the manufacturer but all switches (as i received them) were "up". So the defaults are:
-You're telling it you're feeding it speaker-level inputs, not...

United States on Dec 25, 2020

JasonR: Haven’t installed yet but was as expected.

Canada on Feb 07, 2020