Central World is the largest shopping complex in Thailand, quite upmarket for this country it features good quality items but for regular international prices, the upper class locals enjoy shopping here, but it is also a good place for tourist to buy proper equipment.
Central World is a huge complex with high quality stores, if you want to buy proper camera equipment, an original electric guitar or a grand piano, that is the place to go. It has some great restaurants and good coffee stores. It is quite huge and it takes some time to get around.
On the second floor there is a music store which is the official dealer of Fender Guitars in Thailand, here you get the good original stuff.