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13th March 2007, 03:43 PM
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#1 |
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diyAudio Member
Join Date: Apr 2003
Location: Copenhagen, Denmark
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Which terminal is postive ?
Got a pair of Audax 25A tweeters, and has forgot which terminal is + (positive) and which is - (negative). There are no indication on the unit
 They got one wide and one small terminal... Which is which ? Thanks in advance 
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com |
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13th March 2007, 03:46 PM
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#2 |
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diyAudio Moderator
Join Date: Apr 2002
Location: Chatham, England
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On most Audax, (waiting for the
 ), the small terminal is positive, but you can safely check them with a 1.5V battery.
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Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort |
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13th March 2007, 03:58 PM
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#3 |
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Did it Himself
diyAudio Member
Join Date: Nov 2003
Location: Gloucestershire, England, UK
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Not sure I would check tweeters with a battery. Might be easiest just to see which way sounds best?
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www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more |
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13th March 2007, 04:09 PM
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#4 |
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diyAudio Moderator
Join Date: Apr 2002
Location: Chatham, England
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I've never hurt one yet. I wouldn't use a 9V though...
__________________
Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort |
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13th March 2007, 04:17 PM
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#5 |
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diyAudio Member
Join Date: Apr 2003
Location: Copenhagen, Denmark
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Thanks all
I try the small terminal as positive first
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com |
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13th March 2007, 04:21 PM
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#6 |
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diyAudio Member
Join Date: Dec 2005
Location: Brighton,UK
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Hi,
I've never tried connecting a battery to a tweeter. Is it hard to see the excursion with only 1.5V? P.S.  Can I bias my tweeters into class A with this method? (Joke)Martin.
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13th March 2007, 04:35 PM
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#7 |
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diyAudio Member
Join Date: May 2005
Location: philly
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every speaker I've ever seen that has a small and large terminal uses the large one as positive, and the small as negative.
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13th March 2007, 04:51 PM
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#8 | |
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diyAudio Member
Join Date: Mar 2002
Location: Aveiro-Portugal
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Quote:
Hi pinkmouse I usually use a 9 Volt battery with good results and the movement of the dome is easily seen. The DC resistance of the tweeter is ~ 6 Ohms , 9 Volts across 6 Ohms give 1,5 Amp ( if the battery is fresh enough... ).That will give a power dissipation of 9 X 1.5= 13,5 W , that the tweeter will take safely for briefs instants... Just my experience...
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Jorge |
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13th March 2007, 05:01 PM
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#9 | |
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diyAudio Moderator
Join Date: Apr 2002
Location: Chatham, England
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Quote:
__________________
Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort |
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13th March 2007, 05:07 PM
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#10 |
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diyAudio Member
Join Date: Apr 2003
Location: Copenhagen, Denmark
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Ok
 Did the battery test anyway Small terminal on AUDAX A25 tweeters are - (negative) 
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com |
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