Theoretically, if you insist on this configuration, you would wire the two sony's like this
That is 4 ohms to one of the channels on the DUAL amp, the other would be the 4 ohm twelve. That only gives you 240 watts to the two 10s and 240 to the 12. This could work in the interim but you really need a different amplifier. If you do this, don;t tune them differently, nothing to gain tuning the tens slightly higher, just losing low end.
That is 4 ohms to one of the channels on the DUAL amp, the other would be the 4 ohm twelve. That only gives you 240 watts to the two 10s and 240 to the 12. This could work in the interim but you really need a different amplifier. If you do this, don;t tune them differently, nothing to gain tuning the tens slightly higher, just losing low end.
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