Hard to say, the baskets do not look Coral. The 2nd driver, if those measures are at all accurate, suggest that it is toast.
dave
dave
Realistic Electrostat 4a mid-range
Thanks for your response planet10!
I am trying to learn how speakers are designed and there is much I don't know.
Yes, I thought the driver that has the concentric circles on its cone (ribbed) must have problems but it passed the buzz test and produces sound. I re-tested a couple times to make sure that the values above were correct. Below, I have done nearfield frequency responses for both drivers.
Smooth surface mid-range driver
Ribbed surface mid-range driver
Also, is the roll-off that starts about 2k - 3k on these drivers the reason that there is no inductor on the mid-range?
If so, then these mid-range drivers were custom designed for this speaker?
And if true, it may be impossible to find direct replacements.
It appears that the Wavecor WF168WA06 6-1/2" 8 ohm driver has the same dimensions and the bolt mount diameter is within a few mm but would need something to roll off the high frequencies. Since there is a volume pot for the mid-range on the speaker the replacement should ideally have greater or equal sensitivity to be a drop-in replacement.
Thanks for your response planet10!
I am trying to learn how speakers are designed and there is much I don't know.
Yes, I thought the driver that has the concentric circles on its cone (ribbed) must have problems but it passed the buzz test and produces sound. I re-tested a couple times to make sure that the values above were correct. Below, I have done nearfield frequency responses for both drivers.
Smooth surface mid-range driver
Ribbed surface mid-range driver
Also, is the roll-off that starts about 2k - 3k on these drivers the reason that there is no inductor on the mid-range?
If so, then these mid-range drivers were custom designed for this speaker?
And if true, it may be impossible to find direct replacements.
It appears that the Wavecor WF168WA06 6-1/2" 8 ohm driver has the same dimensions and the bolt mount diameter is within a few mm but would need something to roll off the high frequencies. Since there is a volume pot for the mid-range on the speaker the replacement should ideally have greater or equal sensitivity to be a drop-in replacement.
