Suggest me a system for cars like alto

Congrats on buying a new car or atleast thinking of buying one anyway adding sound to your car can be one of the most enriching experience but u need to make the right choices and the most vital part of ur system is the amplifier so don't cheap out on it. 15k is a little less in in my opinion. As far as the speakers go the majority of the people are going for the Kenwood KFC-HQ718 reasonably good speakers (They're a bit too harsh IMO) for a reasonably good price they'll cost you around 4k, you can also get cheaper speakers but don't expect them to be out of this world. There are a vast number of subwoofers in the 3-4k price range which perform very well, you have the sony P5, Cerwin-Vega HED series, Pioneer 305C the most popular choice, Kenwood 3009 is the cheapest price wise,I think, they're all good IMO. As far as head-units go you can go for a Pioneer, sony or Kenwood. The benefit of buying a Sony HU is that it will also have a warranty which the other brands don't have but Pioneer is the most popular brand when it comes to head-units. But try having a look at the Pioneer 2750 or 1750. Can't really confirm you the prices but they would be between 5k more or less. So that really dosen't leave you much for the AMP which really will make or break your system. You'll be needing a 4-channel AMP to power the speakers and SUB. There are so many brands out there all I can say is don't cheap out and buy a chinese made AMP. You need a korean made AMP, a AMP with a rating of 4x50RMS will do you fine but the more the merrier . btw, is the car gonna run on CNG? which city are u from?