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In the Forum: Horn-Loaded Speakers
In the Thread: The new G.I.P speakers.
Post Subject: A huge differencePosted by Romy the Cat on: 2/21/2015
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 Purite Audio wrote: |
| Field coils do need to
be used with a degree of care, you mustn't forget to turn on the power
supply!Keith. |
|
Well, yes and no. For sure you should not forget to turn
them on but the intelligent way is to feed field coils power supply from the speaker
signal. You make the circuit with 10-20 mOhn input in order do not affect the signal
in any way and in case any current flow in you turn the field coils power
supply for let say 15 min. That all is being done for year in subwoofers…
The true problem however is not there. As the field coils induce a magnetic field in driver
polls the core is getting warmer, particularly in low voltage drivers. The hot
driver sound differently then cold one, so in my estimate you need at least 15
min until driver reach own cruse temperature. Ask me why one would need it if “here wasn't a
huge difference between” between perm magnet and field coils….
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