I don't know if this is the correct subsection or even the right forum. Goals: Build a power amp for an active bass without a preamp stage. Make it cheap. Really cheap. Chintze. 600 watts into 2 ohms. $225 plus labor. Easy parts: Par Metal 12X12X3 chassis, Mean Well 48VDC@12.5A power supply, Sure TAS5630 class D power amp, 2-cliffs 1-25K pot, 1-knob, 1-switch, power, 1-fuseholder and fuse, cord, grommet, and indicator. Mmmmm, lets go!