KTP-445a - Attached to Non-Alpine Radio
I have a first gen KTP-445a (non adjustable gain and no high pass filters) that powers a Sony XAV-AX3000 head unit. You can use any of the KTP amps with any head unit (even pre-2005 Alpine units) as long as you don’t mind cutting the input connectors on the amp and your head unit and connecting the wires manually. This is the third one I’ve owned (only one of which I used a compatible Alpine head unit) and the first one without the gain adjustments.
As other reviews stated, this amp is powerful and will make your stock speakers come to life. I was worried that without the gain adjustments and with stock speakers that I’d barely be able to turn up the head unit without it being too loud, but it’s not the case. I wasn’t worried about not having a high pass filter because most head unit have them anyway, and I plan on using full range speakers instead of subs. The stock speakers sound much better than before and it’s not overpowering. However, it is as loud as you’d ever want to listen.
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