Build guides for every kit.

Usually a problem on the amplifier side of the crossover. Check the input wires are properly connected at the crossover (including ground wires returning to the negative connection) and at the binding posts. Make sure stray wires or other metal aren’t shorting positive to negative.

Most often a bad connection in the crossover. Check that only matching letters share a connection point, that inductors are connected on the tinned (silver) lead and not over the insulation, and that nothing is loose.

Usually a loose connection. Check every driver and binding-post connection, and that solder joints are solid with no movement in the joint. Look for bare wire touching where it shouldn’t. If you can’t find the source, contact us.

Likely a short — the amp is seeing little or no load. Look for bare crossover wiring touching where it shouldn’t, and make sure the binding-post terminals aren’t touching each other. If you can’t find the source, contact us.

Check polarity is consistent inside and outside both binding posts — one inverted speaker cancels bass. Keep foam clear of the port openings, confirm the woofer is on the W +/− section of the SmartNode board (not T +/−), and that the port is cut to the correct length.