i want to know how i can connect my semi acoustic guitar to my computer woofers without using amplifier is it possible or not
YES it is very much possible. All you need is a device which will act as a jack converter. It means that the device will have an input port which fits your guitar jack and the output jack will be a thinner one which can fit into your woofer port. You can get this thing made from any local electrical goods repairing shop. Once you get that you can plug your guitar and play it easily.