Alpine KTP-445

Great

Great amp got it to to get my bass back after changing my speakers in a 05 impala boy did it do the job my jbl gto928 and gto628 scream now, by the way bypass factory amps for best results

Alpine KTP-445?

I just bought this, Maybe I should take it back! My Alpine CDA-105 sounds a little better without the KTP-445 installed. Others may have luck with this little amp but not me. Well i guess it sounds about the same as my CDA-105 hooked up straight to the speakers. It doesn't sound like 45 watts RMS, more like 25W RMS x4!

Alpine KTP-445

First of all, i dont quite hear much of a difference or increase in my sound quality or power. maybe a little, but not much. kind of made me mad that i spent 110 bucks for my CD player not to distort a couple more volume levels. i guess that's why they make 4 channel amps. would not recommend unless you really don't want to put a 4 channel amp together. its kind of hard to fit behind your CD player too with all the wires. but on the other hand. it does sound good!

Great Add...

I have this amp installed in my `90 Jeep Wrangler.. I chose it for two reasons.. 1. - compact size.. 2. - good little boost.. It is hooked to the Alpine CDA - 9886M.. I wanted to make sure I had enough power behind the 6 1/2`s and 6x9`s to sound good and it did the job well.. The amp is so small I have it mounted inside the overhead Tuffy Security console with the deck.. Worked out great because I didn`t want a big amp on the floor of the jeep - Space is limited in a Wrangler and amps don`t like the deep water crossings on the trails... =)

Decent

What I like: It's dummy proof. Plug n play. 1 switch for low/high on the back.
What I don't like: Lots of wires, and still bulky. You need a lot of room to hide it.

What could have been done better: Remote for the switch because you will have to get behind the radio or wherever you mounted this to change from low/high. And some wire loom to make it easier to fish the wire.

Other thoughts: it works well, paired with kenwood components and alpine cde-126bt. Volume cranked to 24 and it screams. Without this the volume would have to be at 26 for the same sound. So it does work, well it's meh/ok. The headunit has decent output as it is so if you have a crap headunit it's worthwhile. It is worth the price.

A Professional View

I've been a mobile electronics installer for nearly 30 years. The KTP-445 is a nice amp, but the buyer should be aware of its purpose. This amp is not designed to run subwoofers. Its primary use is to improve the response and lower distortion of four typical full-range speakers. Used with modern Alpine head units, it is a simple plug-in installation. Just unplug your radio at the back, plug one harness back into the radio and the other into the harness you removed. That's it! The amp is so small, it will fit behind most radios or under the dash. There's a fair amount of harness to make it easier to locate. You aren't going to experience a great deal more of volume. Remember, practically all head units today already output from 18-23 watts per channel, so this amp is only about twice that and you don't add that to the radio's power, you REPLACE it. Doubling power gives you only about 3 decibels more volume, barely detectable to the human ear.

Finally, notice that this amp DOES NOT have RCA inputs. It can be wired to other brand radios, but you need to know what you're doing: Not advisable for the novice.

small and easy install

I love this product because its small enough to hide behind my dash, no wiring kit necessary so that saves time effort and money. only drawback is only 45rms. its not a lot so if you every get better speakers a bigger amp might be necessary however i could hear a difference in the sound quality. Highly recommend.

Good value

For someone with an Alpine head unit that wants a little more volume but does not want to aliens the cash on an amp kit and rca's, not to mention labor out the extra cost of a conventional four channel amp, this thing does pretty well. I had this in my ride and it did a nice job. Not a ton of features, but of the head unit had cross over ability and you have reasonable expectations for this, it is a great convenient low cost option to improve your sound system.

Love It

I was trying to choose which way I wanted to go with my highs in my 1998 Lincoln Navigator. And I choose to go with the KTP-445. At first I was wondering would this be enough power and after I installed it. I felt in love with it.

KTP-445

You might want to get an amp with more power.