ScooterMcTav
I know less than I think
Morning all,
I have a pair of original Forte that have never made it into regular rotation, but were great second speakers in a dual speaker setup for certain types of music.
These were purchased cosmetically challenged, but mechanically sound, and had the Crites tweeter upgrade done.
Regardless, I have wanted to refurbish these cosmetically, and while having them apart, wanted to do some of Moray James' tweaks. However, I have a new problem.
When out in the garage last year, one was knocked off a chair, and fell on a top corner. The cosmetic damage I can fix, but it appears to have caused some mechanical damage.
I hooked one up last night to remind myself of the sound (B&W on the other channel), then decided to hook up both. Well things sounded way wrong in the speaker that fell.
It almost sounded like a reverse polarity, but when I switched wires, it put the amp in protection mode. When I switched back, protection mode again.
Before disassembly, I put the multimeter on the terminals, and both speakers read at just over 4 ohms.
Once disassembled, I tested each driver. In the good speaker, I read 4.4 ohms woofer, 12.1 ohms mid, and 8.8 ohms tweeter. In the bad speaker, I read 4.4 ohms woofer (same), 15.0 ohms mid (2.9 ohms higher), and 8.8 ohms tweeter (0.3 ohms higher). Not sure if the provides any clue.
I also read all of the sets of terminals off the crossovers, and each returned very similar values. There was no obvious physical damage to any component, and I disassembled the mid from the broken speaker without finding any visible damage.
Welcome thoughts from others as to specific tests or diagnosis that I can do. It'll be a few weeks before the cabs are ready for the drivers anyways.
I have a pair of original Forte that have never made it into regular rotation, but were great second speakers in a dual speaker setup for certain types of music.
These were purchased cosmetically challenged, but mechanically sound, and had the Crites tweeter upgrade done.
Regardless, I have wanted to refurbish these cosmetically, and while having them apart, wanted to do some of Moray James' tweaks. However, I have a new problem.
When out in the garage last year, one was knocked off a chair, and fell on a top corner. The cosmetic damage I can fix, but it appears to have caused some mechanical damage.
I hooked one up last night to remind myself of the sound (B&W on the other channel), then decided to hook up both. Well things sounded way wrong in the speaker that fell.
It almost sounded like a reverse polarity, but when I switched wires, it put the amp in protection mode. When I switched back, protection mode again.
Before disassembly, I put the multimeter on the terminals, and both speakers read at just over 4 ohms.
Once disassembled, I tested each driver. In the good speaker, I read 4.4 ohms woofer, 12.1 ohms mid, and 8.8 ohms tweeter. In the bad speaker, I read 4.4 ohms woofer (same), 15.0 ohms mid (2.9 ohms higher), and 8.8 ohms tweeter (0.3 ohms higher). Not sure if the provides any clue.
I also read all of the sets of terminals off the crossovers, and each returned very similar values. There was no obvious physical damage to any component, and I disassembled the mid from the broken speaker without finding any visible damage.
Welcome thoughts from others as to specific tests or diagnosis that I can do. It'll be a few weeks before the cabs are ready for the drivers anyways.
