My new speakers have a recommendation of 60w of power and I’ve realised the stock head unit only provides 30-35w. I’m not wanting to change the head unit to ensure the classic aesthetic is still maintained.

Can anyone advise me on what I need to do to install an amp? I’m reluctant to go to an audio shop. I have no interest in installing a woofer.

Guides online don’t tell me much..

 

You don't need to raise the radio output power just because the speaker manufacturer recommends 60W. You raise the radio/amp power if you want to listen to even louder music than what you have with the existing 35W. Or, if you often use your existing 35W up to, say, 80-90% and you want to improve somewhat the quality of sound at that level.

If you are happy with the 35W you have (if it's like "more than enough") just install the "60W" speakers. For any amplifier/speaker combination, it is actually recommended, for better quality of sound, that the speakers are rated at considerably higher power than the max. power the amplifier/radio produces. The other way around is not recommended as the speakers will distort the sound when pushed to close to their limit and they may even get blown if one is not careful with the volume.