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Aurum Cantus AC-180F1D 7" DVC Woofer
Can this dual voice coil "4-ohm" driver be configured as an 8 ohm driver?
I would like use the stated "dual voice coil design allows unique crossover options" capabilities to transform the driver in to a 8 ohms so i can us it, along with complimentary 8 ohm drivers, in a three-way speaker.Or do they have a 8 ohm vesion with similar low frequency response.ThanksPatrick
This driver has two 8-ohm voice coils, so what you could do is hook up just one of the voice coils, and that will give you an 8 ohm load. All DVC woofers can be connected in one of three configurations with no ill effects at all: parallel, series, and running just one voice-coil. In the case of this woofer, those configurations would give impedances of 4, 16, and 8 ohms, respectively. Note, however, that if you run just one of the voice coils, then the power handling of the woofer will be approximately 60% of the rated value. In this case, it would be about 60W RMS / 85W max. This is because there is half as much voice coil wiring to dissipate the power.There is some debate about whether or not a DVC woofer can be run with just one voice coil attached, but I can assure you, as an electronics engineer and experienced hi-fi enthusiast, that doing so is just fine. The only issue is the reduced power handling.Alternately, there are 3 other Aurum Cantus 7" 8 ohm woofers over in the "7 inch woofer" category here on Parts Express. They have fairly similar specs, esp the AC-180F1, which is the single voice-coil version of this AC-180F1D.
Date published: 2012-05-07
Can this sub be used sealed and if so what size?
If you click on the SPEAKER BUILDER tab and then WOOFER SELECTION GUIDE in the right column - you can see these specs for many drivers which helps you in making your decisions. For the AC-180F1D a .66 cu ft enclosure yields an F3 of 72hz - making it a perfect mid-woofer for LCR home theater or mini-monitors crossed over to a subwoofer. In a ported cabinet - you need 2 cubic feet for an F3 of 38hz - which is right at the drivers Fs so there would be some performance and amp/impedance issues... This driver will perform best in a sealed enclosure.
Date published: 2012-08-11