If you can go outside, then put the speaker on a 8' ladder well away from the house. Do a sweep in REW (or what ever program you like). Done.
If you can't, then place the speaker on the floor of the biggest room in the house. Keep it as far from walls as possible. Couches too. Put the mic on the floor 3ft away. Tip the speaker forward such that the tweeter is on axis with the microphone. Set the winow/gate at 5ms in your measurement program like REW. Take a sweep in REW (or what ever program you like). Now, the response will be high in the low end and sensitivity will be off. But to confirm the speaker is working/ hooked up right, this doesn't matter.
Now that you have your sweep, you could post it here and get comments. But you'll know something isn't quite right if there is a big null at the XO, or there's a sensitivity mismatch between the tweeter and woofer. Then you know something is up. Any odd peaks or dips greater than 5db above 400hz should also be considered.
Another excellent step is to measure the impedance, but not many people have this capability.