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Audio and Video Talk
General Discussion
Infinity Kappa 1.7cs enclosure size?
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<blockquote data-quote="Ampdog" data-source="post: 46542" data-attributes="member: 144"><p>Enigma,</p><p></p><p>Came onto this rather late. About the 2 ohm: OUCH!!</p><p></p><p>But why do I feel uneasy about the 'exactitude' (as Churchill said) of that? You used then before and was surprised by the response. With what amplifier? Why did the 2 ohms not seem to matter then?</p><p></p><p>This is the first time I encounter a 2 ohm system. The voice coil will have to be real massive to handle 200W odd at that impedance, drawing 20A. Hey?? Then for the cross-over to be loss-less (sort of ...) A suitable inductor would likely have to use 2 - 3mm wire ....</p><p></p><p>That is why I would not be surprised if a step-up transformer resides inside the cabinet. PROBLEM: You have the separate drivers, not inside a cabinet, so you would have noticed a transformer - yes? ... or could it be disguised as part of the cross-over components?</p><p></p><p>At some early stage I would measure the voice coil d.c. resistance of each driver just to make sure. You will have to take care that you read the real resistance, i.o.w. take your meter leads into consideration etc., but you are probably aware of that. As for the advertised product (inside cabinet), it would not be the first time that such a system included a transformer to say 8 ohm drivers.</p><p></p><p>Perhaps a last straw, but the operation is simple enough. Good luck!</p></blockquote><p></p>
[QUOTE="Ampdog, post: 46542, member: 144"] Enigma, Came onto this rather late. About the 2 ohm: OUCH!! But why do I feel uneasy about the 'exactitude' (as Churchill said) of that? You used then before and was surprised by the response. With what amplifier? Why did the 2 ohms not seem to matter then? This is the first time I encounter a 2 ohm system. The voice coil will have to be real massive to handle 200W odd at that impedance, drawing 20A. Hey?? Then for the cross-over to be loss-less (sort of ...) A suitable inductor would likely have to use 2 - 3mm wire .... That is why I would not be surprised if a step-up transformer resides inside the cabinet. PROBLEM: You have the separate drivers, not inside a cabinet, so you would have noticed a transformer - yes? ... or could it be disguised as part of the cross-over components? At some early stage I would measure the voice coil d.c. resistance of each driver just to make sure. You will have to take care that you read the real resistance, i.o.w. take your meter leads into consideration etc., but you are probably aware of that. As for the advertised product (inside cabinet), it would not be the first time that such a system included a transformer to say 8 ohm drivers. Perhaps a last straw, but the operation is simple enough. Good luck! [/QUOTE]
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Audio and Video Talk
General Discussion
Infinity Kappa 1.7cs enclosure size?
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