I play a ibanez rg655 since a while and want maybe learn to play bass guitar.
Is bass hard to learn if you already play guitar?
Or is it almost the same?
It is not difficult, but it is not the same, either. While the bass and the guitar have much in common, their differences are very much in excess of their similarities. You can become a competent bass player with a thorough knowledge of, and skill with, the guitar. But to become a good or great bassist requires the same dedication to the instrument as it does with any other instrument.
"Maybe this world is another planet's hell?" - Aldous Huxley
Learning to play bass in a basic way is easy, but bass is a different instrument and good bass players approach the instrument differently to a guitar. Its like a different mindset than being technically different to play, except for finger picking and slap bass techniques.
blachrisbla It depends how good you want to be. Playing guitar gives you the advantage of having some of the mechanics but one of my pet peeves is too many bass players today are limited to using a guitar pick. Learn to play bass with your finger, alternating index and middle, index and middle. 1-2, 1-2, 1-2. Youll need to learn to think like a bass player, interacting with the drummer different than before. Bass players are part of the rhythm section. Your time must be rock solid. A lot of guitarists playing bass are "too busy." If you want to be a bass player not a guitarist playing bass, it will take time but playing guitar, your fingers should already be agile so you have an advantage. Since you are a musician, you know the approach is different. Pick up the " Slap It" bass instruction book. http://www.musiciansfriend.com/books-sheet-music-media/theodore-presser-slap-it-funk-studies-for-the-electric-bass-book-cd?cntry=us&source=3WWMWXGP&gclid=CjwKEAiAoaXFBRCNhautiPvnqzoSJABzHd6hbIJReuCfiRdl3dW0Qhe8phQP1IyIDD842qREh_ujZxoC4yLw_wcB&kwid=productads-adid^156717928496-device^m-plaid^143156639322-sku^948020000000000@ADL4MF-adType^PLA
This book separates the avg bass players and guitarists playing bass from the good bassists.
Quote by blachrisbla
FatalGear41 thanks, and i need a different amp as for guitar right?

Yes, you definitely need a bass amplifier to play the electric bass. An electric bass will destroy the speakers of a guitar amp. It will not hurt the amplifier itself, but the speakers cannot take the low frequencies.
"Maybe this world is another planet's hell?" - Aldous Huxley