1993C4LT1

I have very little stereo upgrade experience, so I have some questions.
Radio: Kenwood DDX419
Rear speakers: Alpine SPR-69
Front speakers: Alpine SPS-510
Amp: Not yet, bank account is a little low now for a good amp. But I do plan to power all 4 speakers with a pretty good amp.

So I have already taken out the old school Sony radio that was in the car. It was using the factory Bose speakers. With my new speakers, will I have to buy a Wiring harness for the radio? And I have already bought the Metra kit to install the double din.

Also, will I need to buy new wiring for anything? Sorry for the novice questions.

Looking at amp prices just now, they aren't as much as I expected. So what would be a good amp, considering the speakers I'll be using? I know the speakers I bought aren't the best though. I asked in C4, but no help.

-=Jeff=-

What is your target price? How many channels? Where are you looking to install it? Let’s start there. For a radio check out the Sony XAV-AX100 or even the XAV-AX200. They seem to be pretty nice for the price

1993C4LT1

4 channel amp for sure. Did some research since, and going to return the SPS 510s and switch them for the SPR 50(type R's), since I will have a 4 channel amp. Budget? Another $300-350. I'll keep my Kenwood I have now. It has been sitting for a while, and worked fine.

What do you mean by: where are you looking to install it? Well, the amp is pretty damn small in size. I am hoping it will fit under one of the seats. If not, I'll just put it in the trunk. Speakers, in the factory locations.

Here is the amp I plan to use. https://www.crutchfield.com/p_500MRV...-MRV-F300.html