is a pair of the crossover boards themselves...the level adjustments can be the "trimmers" on board as provided. A regulated +/-15 volt supply needs built, and input/output jacks are on the boards too.
I have a 3 channel home theater amp I will be adding some XM9 boards to, for driving my full range TQWT systems. The left/right are around 35 watts, the "center"(will drive the sub) is 60 watts.
If you are comfortable soldering on a circuit board, the assembly is routine and easy. The boards are available "pre-built" for only $20 each more than the parts kit boards, I believe. Then just basic hookup wiring would be left. Samyes, the assembly manual instructions are very clear and detailed, figures well labeled, etc.
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