Warren,
I dont think the Revel produced the cracking noise. I believe your sub might have triggered some sort of vibration or resonance in the surrounding of the Revel, perhaps the join between the speaker and its stand, or the furniture nearby. The vibration was most likely airborne at very low frequency. That is why the cracking noise went away when you turned the sub down or ran the Revel by itself.
I had a similar problem a few months ago. After I upgraded to a pair of Vandersteen model 5, every time I played the Titanic CD track 1, the deep bass would cause my left speaker to buzz. At first, I thought the speaker was defected but when I walked close to it, the buzz disappeared, I then walked back to the listening chair and the buzz came back. It only happened on one or two CDs at certain volume level. I later put a pair of 16 Tube Trap at the front corners to control bass boom and the buzz went away forever. I still dont know what was buzzing.
I hope this help.
I dont think the Revel produced the cracking noise. I believe your sub might have triggered some sort of vibration or resonance in the surrounding of the Revel, perhaps the join between the speaker and its stand, or the furniture nearby. The vibration was most likely airborne at very low frequency. That is why the cracking noise went away when you turned the sub down or ran the Revel by itself.
I had a similar problem a few months ago. After I upgraded to a pair of Vandersteen model 5, every time I played the Titanic CD track 1, the deep bass would cause my left speaker to buzz. At first, I thought the speaker was defected but when I walked close to it, the buzz disappeared, I then walked back to the listening chair and the buzz came back. It only happened on one or two CDs at certain volume level. I later put a pair of 16 Tube Trap at the front corners to control bass boom and the buzz went away forever. I still dont know what was buzzing.
I hope this help.