rmcelwee
Member
Open speaker and audio amp measurement questions...
I have a Blasteroids cabinet with two speakers driven by the audio pcb and a subwoofer driven by a separate amp (they call it a House Quake pcb). The subwoofer is working but only one of the speakers is working. I pulled the speakers and one showed 8 ohms but the other was open. OK, bad speaker... BUT, before I grab another and install it I wanted to make sure the amp isn't going to ruin it since I probably don't have many spares. I wasn't exactly sure how to test the output from the amp but I noticed that the wires for the working speaker were showing a bouncing 2.9 to 3.0 mV and the wires for the blown speaker were showing a bouncing 4.9 to 5.0 mV. I thought I could have seen like a 12V reading coming from the amp to the speakers but I could not. So, my questions:
1) How do you really see if a signal is going to the speaker?
2) If mVs are how you see the signal, is twice as much going to the blown speaker what killed it?
3) Fill in the blank. I'm such a novice with this I don't know what else to ask.
I have a Blasteroids cabinet with two speakers driven by the audio pcb and a subwoofer driven by a separate amp (they call it a House Quake pcb). The subwoofer is working but only one of the speakers is working. I pulled the speakers and one showed 8 ohms but the other was open. OK, bad speaker... BUT, before I grab another and install it I wanted to make sure the amp isn't going to ruin it since I probably don't have many spares. I wasn't exactly sure how to test the output from the amp but I noticed that the wires for the working speaker were showing a bouncing 2.9 to 3.0 mV and the wires for the blown speaker were showing a bouncing 4.9 to 5.0 mV. I thought I could have seen like a 12V reading coming from the amp to the speakers but I could not. So, my questions:
1) How do you really see if a signal is going to the speaker?
2) If mVs are how you see the signal, is twice as much going to the blown speaker what killed it?
3) Fill in the blank. I'm such a novice with this I don't know what else to ask.