Boston ac. Hps 10ho panel no power supply

Boston ac. Hps 10ho panel no power supply, need transformer values!

I have a Boston acoustics hps 10ho panel I bought from eBay to power a 10" sub from an old amp/sub combo. Panel looks great and will power my sub but it didn't come with a power transformer and that model is discontinued! No love from Boston. I have schematic diagrams and enough equipment/ knowledge to wire it in, but am I hooped to find the specific voltages needed? I will try and attach the PDF of the wiring.
 
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here is the schematic
 

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here is all but the last few pages. its 250w, not sure of impedance, the speaker i want to drive 6 ohm.
 

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These voltages and amps, are they so exact that if values are off slighly amp will not work? Or blow up? Or does it just mean I won't be getting peak performance from my board. 1-2 amps or volts plus minus. Long and short, I have no sub, need SOMETHING to fill out lower end of my 2" surround towers. Would it be way easier to use my 6ohm sub unpowered from an amp out?