04-23-2013, 04:34 AM
No. The 37-660 speaker has a field coil resistance of 2200 ohms, while the field in the 645's original speaker (H-21, by the way) has a field of only 435 ohms.
Here are speakers that would work in your 645K:
H-21 - 97H, 97D, 97X, 640X
H-26 - 37-650X, 37-650PX, 37-665X, 37-2650X - 460 ohm field, close enough
H-30 - 37-9, 37-10, 37-11 - 480 ohm field, close enough
Here are speakers that would work in your 645K:
H-21 - 97H, 97D, 97X, 640X
H-26 - 37-650X, 37-650PX, 37-665X, 37-2650X - 460 ohm field, close enough
H-30 - 37-9, 37-10, 37-11 - 480 ohm field, close enough
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Ron Ramirez
Ferdinand IN
