Hi sifus,

Appreciate your help with my problem.

I'm currently using Focal IS165TOY 2-way component.
Woofer: 60W RMS at 4ohm
Tweeters: no spec on manual and website, but safe to assume the wattage will be much lower (most standalone tweeter from Focal is at 15W RMS at 4ohm).

Both woofer and tweeter has built-in passive crossover at the speaker itself.

Current setup:
Tweeter is connected to HU
Woofer connected to stock car amp about 30W.

I'm planning to get a 4 channel amp at 60-70Wx4 with HPF/LPF and gain settings. My question is: Can i just connect the tweeter to the new amp despite the difference in wattage? Any advantage/disadvantage of doing so? Or should I maintain it being connected to the HU?

Thank you very much in advance!

does your component comes with passive crossover? If yes you can connect both speakers and tweeters to the crossover..

if tweeter and speaker connected to separate sources, sound wont be the same bro..

the passive crossover is built in separately into each tweeter and woofer. not like the 1 box type u normally see.

meaning, visually u just connect speaker to amp. no visible crossover box.

i assume you worry the speaker are having higher power than it should?

the gain will do the trick by multiplying the correct power to the tweeter.

Crossover is just to limit the frequency range, it reduce some power but it's not a proper power limiter, it's a range limiter.

So, sum up, yes u can use the 4ch amp to power the 4 driver, adjust the gain correctly and you will be ok. Power doesn't really kill the driver, the range kill it mostly.

Yep, that was my concern. Thank you for your explanation.