Alpine KTP-445A KTP-445 Head Unit in Line Power Amplifier, Black

Alpine head units have a built in amplifier but this provides the missing depth to the music and is an easy plug and play fit. It is small but don't agree that it will fit behind the radio, certainly not in a BMW e30 where dash space is limited. You can tell the amp is working by the improved sound quality as there is no other indication like a light to show it is on. All in all, a very handy little amp which can be discreetly hidden and it delivers..

Easy to install if your swapping your 'Stereo' system and effectively ups your system but you may have to update your speakers if you want to use at max volume.

I got this amp together with alpine UTE92BT head unit, and jbl Club component 16.5x4Spekers, i wanted small ,compact and less wiring as possible to hide it behind the dash. I''m really impressed with the quality sound of this amp for such a small "brick". I will rate this amp at only 4 stars bcz i had several problems having to do with the power supply from car OEM that comes in line with the head unit, after one week of intense use the OEm fuse blown bcz I am a heavy listener and at high volumes amp needs more power(amps) the 18awg car oem wiring was unable to deliver the minimum 25amps needed for the amp and head unit so voltage drop happen ,after 22volume (from 35) a kinda protection was coming on and volume was automatically dropping at 7level. So what i did I''ve upgrade the constant12v and ground with 12awg from the battery and went to amp iso to connect it(you need to cut old wire and isolate maybe in the future you might solder back). I have to say that i can go over 18volume level bcz is much louder after wire upgrade and no protection coming on at high sound levels. Very very happy with the outcome 😊☺️ small, compact and quality sound. Also if i have to buy it again i will go for the other version ktp445U as you can put proper wiring and also better sound quality. I hope that this review will help others to know the pro and cons for this amp. Also head unit and amp very good combo high quality and Manny functions. I wrote this kind review cuz i was looking for this kind of experience and i didn't find anything hope to help others to enjoy good quality sound.

Amplificador muy compacto, de tamaño menor a la mitad de la radio, que duplica la potencia RMS de las radios (suelen tener 18 - 20 RMS) a 45 RMS. La instalé en un Xsara Picasso con radio Alpine 178 CD y mueve los 4 altavoces de las puertas muy muy bien, con potencia y calidad (no discoteca pero sí justo al límite de los oídos). Llevo altavoces delanteros y tweeters originales (muchos dicen son porqueria) y suenan de lujo, puertas traseras llevo coaxiales Focal isc 165 con tweeters orientables y genial aunque ciertamente los altavoces de puertas traseras son los menos importantes por la mala ubicación (al menos en mi coche). En el maletero subwoofer 8” Alpine SWE-815 auto amplificado que rellena todo el habitáculo de subgraves de calidad, no lo pondria más grande. Vendedor y Amazon excelente

Non ho mai comprato un prodotto di questo genere, ma compro prodotti alpine da una vita e devo dire che questo è riuscito bene e fa il suo lavoro ... per chi non vuole far passare fili in tutta la macchina è perfetto.. io ho cambiato le casse originali da 16 e i Twitter anteriori e o messo a pianale 2 jbl TL 900 e questo scatolino pesta potenza a più non posso ...certo che se uno vuole spaccare i vetri e alzare in volo la macchina non il prodotto ideale ....ma chi vuole ascoltare musica bella alta e di qualità lo consiglio.. è anche facile e veloce da montare per chi possiede una radio alpine per altre radio non penso vada bene solamente per i connettori ...

Le Combo Ultime montage nickel sur citroen C2 poste cde 178bt avec interface alpine APF-D101PS et enceinte double voies av et arrière Pioneer. Un son pur et limpide que du bonheur mieux qu'a l'origine. J'ai pu tt récupérer l'odb radio et music mais demande un peu de temps pour bien le monter. A recommander.

Alpine is the best , plug and play amp so simple to install with alpine head units. Save the trip and money to the car audio shop and hear what you've been missing in your music. Get loud live clear music with this amp. Aftermarket speakers and bam concert in your ride. You don't have to run new lines of wires buy fuses or find space in your trunk to install. Small and compact fits easily behind the dash and gets slightly warm to the touch but no near hot when used heavily. 45 x 4 watts RMS give your speakers some power to perform.

Wenn man keinen MEGA-Bass-Druck braucht, aber weniger Verzehrungen bie mittlerer Lautstärke und nicht das halb Auto zum Einbau zerlegen möchte, sollte man hier unbedingt zuschlagen: Auch von ungeschickten Händen schnell eingebaut, und wegend er geringen Abmaße verschwindet dieses Teil ohne viel aufwand in beinahe jedem Armaturenbrett ohne viel Aufwand....Klanglich - wei ich finde - unschlagbar, und 100% besser, als bei "normalen" Autoradiobetrieb....