Yeah, that and the "burning fuse" on the bonus levels. Changing the pitch of the sound to let you know your running out of time really added to the stress of trying to clear the bonus level. Especially with that sound coming out of those same four speakers.
The bass is so powerful on that game, it made me realize that I have a cold solder joint on the video connection. Its so awesome! I bought this game planning to sell it, but now I believe I shall keep it for now Ive got a 12" sub in my car and anything that produces nice bass always has a soft spot in my heart.
I have a 15" Peavey Black Widow in my living room/arcade. I use it to listen to the radio. Some day I'll connect it to Space Duel. If they don't stop me first.