250 watts needs at least 4 pairs of output trannies (for 4-ohms operation) and at least +/-70vdc.
MJE340 and MJE350 have the highest voltage for a Vas or driver, no worries.
With these kind of output arrangement, C8 and C9 may be omitted, parasitic oscillation would not be a problem.
Ang di ko maintindihan, yung value ng R5 at R6. May asterisk sya ts ah, ano ba sinasabi nyan?