I want to power up my Sony SRS-D9 multimedia speakers in car. The speaker system powered by an adaptor which having
input : AC 120V-240V~50/60Hz 60W out put : DC 18V 2.6A I am living in India. Here 230V AC plug available in my home.
I have two options to install it in my car.
1) Buy a 12V DC to 230V AC converter and plug the adapter for power the sound system.
2) Buy a 12V to 18V converter and directly power the sound system without adaptor.
Which one is the best solution. Which drains the car battery quickly if the engine is off. What are the pros and cons. What are the practical challenges for this setup?