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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Field coil dummy... posted by dee eye why on December 3, 2016 at 10:35:38:
Most field coil speakers would be driven at the voice coil in the normal manner: tube amp or SS amp is immaterial, assuming of course that the voice coil is a known and reasonably common impedance (4-16 ohm)...not all are, esp vintage. The big difference is that stator's magnetic field is generated by an electromagnet and so it must be energized by a relatively clean DC current/voltage source for proper operation. The details of what current/voltage to use are very specific to a specific speaker but there is some latitude to adjust w/o damage. Some may be 5-10 VDC at an amp or so. Others may be 100-200 VDC at many 10s of mA. Some field coils also served as a PS filter choke esp in vintage equip and as a result may have an additional "hum bucking" winding. If you get deep enough into this you'll find claims that some power supply designs "sound better" than others, above and beyond the intrinsic sound of the speaker/enclosure system.
There is a tonne of info on the web if you care to explore further. But remember: Just because you found it on the web doesn't make it gospel truth ;-)
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Follow Ups
- RE: Field coil dummy... - Steve O 15:45:33 12/03/16 (0)
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