My friend and I installed his new tactile transducers he had been building while I worked on my Sonosub. Well, after about 5 minutes of flawless usage (these things are awesome, everyone should have some!), they stopped shaking. After playing with the settings for about 5 minutes, we decided to test the wire connection on another speaker. It worked. So, we came to the conclusion that something must be wrong with the speaker itself. What does a blown speaker look like? We checked the wires on the speaker itself, and they were fine. Any help would be great! Mike BTW - They were 80watt, 4 ohm car speakers.