Alpine KTP - 445 4–Channel Amplifier

Die bisherigen Bewertungen haben mich hoffen lassen und ich wurde nicht enttäuscht. Der Anschluss war denkbar einfach und hat auf Anhieb funktioniert, hängt jetzt im Handschuhfach. Von dem Klang bin ich hellauf begeistert. Die Bässe erreichen gefühlt tiefere Frequenzen, sind wesentlich sauberer und überschlagen sich zudem erst bei höheren Lautstärken als ohne. Die Höhen sind klarer und kraftvoller. Eben ein Verstärker xD Der seine Wirkung aber nicht verfehlt.

Let me first say that I currently own a car that has a aftermarket system in it that consist of one 12" JL subs running off a alpine monoblock pdx amp @ 2ohms/800 watt RMS, components up front and 6x9's in the rear running off a 4 channel 550 watt pdx alpine amp and it rocks hard. So with that said I know car audio and have been building out system for over 20years. Well I bought a 2014 ram 1500 Quad cab 5.7 HEMI 4x4 big horn edition with the 8.4 radio with the stock speakers. Wasn't a bad stereo system for the average person to listen to, but like most factory stereos it lack quality sound due to poor speakers and a crappy head unit(radio/deck). Well like most new vehicles, the 8.4 radio in this truck is tied to several features like the heating and cooling controls, navigation, backup camera, sat readio, settings for the truck, and several other feature as well. So replacing the head unit is not really an option I'd like to explore with this new truck. So I started to look around for a small foot print amp that didn't require running a power line with inline fuse from the battery to the amp and that could be placed somewhere behind the dash. I came across a few brands like clarion, fosgate, some off name brands, and this alpine unit, KTP-445U. Already having alpine amps in my other car, I knew I couldn't go wrong with it, so I made the purchase. Along with the amp I figured I'd order speakers to go with it. I decided on the Kicker-41KSC354 3 1/2 for the dash, Kicker-40CS654 6.5in for the front doors, and the Kicker-41KSC694 6x9's for the rear doors. The installation of the amp was simple and straight forward. Seeing how factory radios don't have RCA outputs, this amp allows you to cut the ends of the RCA inputs off each channel (it's a four channel amp) and use the lines for direct connect to the factory radio harness speaker lines. This also eliminated the need for a remote wire to turn the amp on because the amp detects the connection of the speaker lines and automatically turns the amp on when there is a signal coming over the speaker wire from the head unit. The best part was that this amp fit perfectly behind the factory radio and I was able to mount it to a cross support that was behind the radio. After installing the amp I next did the speakers throughout the truck. Another pretty simple straight forward thing to do. After everything was completed and put back, I reconnected the battery and fired it up and all I can say is fricking WOW!!! This little thing sure packs a punch. It turned this weak head unit/stereo system into something enjoyable. It's not a competition stereo, but boy was I shocked at how good it sounded. No engine noise of any kind! even with the headlights on. The gains are only turned up 25% of the way and it's running full range. For the cost of this amp and the ease of installation this thing is a winner. It will turn any boring head unit into a monster of sound. I should mention that this alpine amp will work with any factory head unit and most speaker configuration. If your vehicle has an upgraded factory system that already has an amp you will need to check out how many channels your factory amp is using and how many speakers your car has. My dodge has six speakers but the front dash speakers and front door speakers are tied together by the factory so they share the two front channels coming off of the amp while the rear uses the other two channels. So for any of you out there looking to do a inexpensive upgrade to your factory radio for better sound, this is your best bet. Are there other options or bigger amps you can install, why yes, but it's at a cost that most people don't want to spend. This little amp will please.

Très heureux de mon achat, installé sur ma moto Kawasaki 1700 voyageur 2016, bonne emplacement pour l'installé et super le son...j'avais déjà changer mes haut parleurs 45 watts RMS mais ils ne sont pas assez puissants donc prochaine achat de nouveaux haut parleurs éventuellement, pour l'instant ça me convient parfaitement.

It's made a noticeable improvement to the factory stereo in my Mazda CX 5. Where I was cranking the volume all the way up to 50, now I'm getting as much power at 30 with added clarity. It was easy to install, was able to find colour codes for speaker wires online and use a multimeter probe to find the accessory lead and make the connections. Small enough to jam in against the firewall behind the stereo. Can tap into ground and power leads for systems protected by a 15 amp fuse, so no running wires to the battery.

Hallo, ich habe diese Endstufe heute erhalten und ich muss sagen es hat sich gelohnt. Endlich werden meine Eton Pows voll ausgereizt und hören sich nochmal deutlich besser an als zuvor. Der Zuwachs an Bass ist enorm und man hat angst lauter zu drehen (positiv gemeint) :) Einfach Super!!!