help with Acoustic cab

[jarrydee]

A bass player friend of mine let me try his old Acoustic 104 6x10 cab, I am reading that this is a guitar cab, is this correct? If so I cant understand why my friend would use it as a bass cab, I am afraid to try it now because I dont want to blow the speakers, and I do not know what ohm they are! Any help would be appreciated, I am a total noob when it comes to bass gear!

 

[jarrydee]

Forgot to add that the 6 10's have these metal looking things on the speaker cones

 

[chillerthanmost]

4 ohm guitar cab

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