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Old 30th October 2005, 08:52 PM   #1
owdi is offline owdi  United States
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Default Sanity check - designing my speaker to be 8ohm amplifier friendly.

I'm designing an MTM speaker using a pair of VIFA TC14SG49-08 5-1/2". I want the setup to be as efficient as possible, without presenting a difficult load to my receiver, which is only rated for 8 ohm speakers.

I want to wire these to speakers in parallel, and use a 3rd order filter at 2000hz along with a impedance compensation circuit. The problem with that configuration is the impedance will be very low, below 4 ohms I believe.

My idea is to not use the impedance compenstation circuit. This would give me a shallower rolloff, and require the use of larger inductors. If I use a small guage, the larger inductors should increase the overall impedance to something above 5 ohms (hopefully). Any thoughs?

I'd hate to pad down the woofer since that works against my objective of efficient speakers.

Dan
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Old 30th October 2005, 11:44 PM   #2
GM is offline GM  United States
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Well, in the good ol' days we used autoformers........... http://www.zeroimpedance.com/

GM
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Old 31st October 2005, 09:57 PM   #3
owdi is offline owdi  United States
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Quote:
Originally posted by GM
Well, in the good ol' days we used autoformers........... http://www.zeroimpedance.com/

GM
Looks interesting. At $450, it would be cheaper for me to simply buy 4 more Vifa speakers. Hmm... bipole MTM... yum.

Dan
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Old 1st November 2005, 10:53 PM   #4
owdi is offline owdi  United States
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Problem solved -- looks like madisound carries a 4ohm version of this driver.

Dan
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Old 1st November 2005, 11:08 PM   #5
VT67 is offline VT67  Belgium
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Can't these things not be DIY'ed??
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