Ok, good comments everyone. Thanks!
Questions: The signal (lights) and speaker are AC powered components. The included instruction specifies 10-14VAC. I get from a couple of you that converting the AC to DC for the speaker is ok. How about the signal? I also read that 18VAC will overheat the components (I am going to assume both the signal and the speaker). Can I run them both on DC? Has anybody done this? I believe both the signal and speaker convert from AC to DC internally. If this is true and you supply DC instead of AC, will this damage any of those internal converting components?