the 900 lead cab marshall has gt12 75 8 or 16 ohm?
Yepp, all Marshall cabs labeled JCM900 has the G12-T75.
The JCM800:s has a variety of different Celestions, for example
G12-65, G12-M70, G12-T75, but no V30:s.
So like HeHasTheJazzHands says, you need to find a AV (angled)
or BV (straight) if you want a Marshall cab with V30:s.
the ohms of mine are 8 or 16?
The JCM900 cab is 4/16 ohms mono, 8 ohms stereo.
I am thinking to substitute 2 cone with 2 v30 but i need to know if buy them of 8 ohm or 16 ohm