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series or parallel?
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<blockquote data-quote="VereChronicus" data-source="post: 1446458" data-attributes="member: 565864"><p>it is actually simple. first things first though. If you change the overall Q....being the Qts of the driver, it will perform differently. This is based on A/B comparison between coil wiring options on the same sub in the same enclosure.</p><p></p><p>We have to look at the DVC as actually being two separate subwoofers first. This is just for simplicity. Lets say they both have coils that DCR at 3.4ohms. We'll call them 4ohm subs. We start with a given and constant (in static position) B or motor force of say 8 Gauss. That is actually already very strong for todays standard big Chinese motors. The other half of the equasion is L or length of wire in the gap. Lets say the flux lines across the gap are perfectly straight at 90 degrees from the pole. (which they are not) but this will simplify the counting of the turns of wire in the gap. So each coil has say X number of turns of wire in the gap. When you use an amplifier per coil, it is the same as wiring the coils in series. When you wire the coils in series, end to end, you can see that you have 2x the windings of wire in the gap vs. just one coil.... simple. the more turns of wire you have in the gap, the higher the L portion of BL. if either B or L increase, the entire BL value will increase. When you wire the coils in parallel, the length of wire is the same as ONE coil, just because there are two runs of wire, it does not draw from the fact that they are connected at both ends, thus just being ONE thicker wire running through the gap. Now that the single parallel wired coil is double the area of the series wired coil.....the number of turns is effectively half that of the series wired coil, Halving the L value of the product: BL. This raises the QTS which we all know is recommended for sealed enclosure over a ported version. as compared to the lower Qts version of the same subwoofer with coils wired in series, which electrically is more suited for vented application than the less restoring force parallel wired sub. did that come out in english?</p></blockquote><p></p>
[QUOTE="VereChronicus, post: 1446458, member: 565864"] it is actually simple. first things first though. If you change the overall Q....being the Qts of the driver, it will perform differently. This is based on A/B comparison between coil wiring options on the same sub in the same enclosure. We have to look at the DVC as actually being two separate subwoofers first. This is just for simplicity. Lets say they both have coils that DCR at 3.4ohms. We'll call them 4ohm subs. We start with a given and constant (in static position) B or motor force of say 8 Gauss. That is actually already very strong for todays standard big Chinese motors. The other half of the equasion is L or length of wire in the gap. Lets say the flux lines across the gap are perfectly straight at 90 degrees from the pole. (which they are not) but this will simplify the counting of the turns of wire in the gap. So each coil has say X number of turns of wire in the gap. When you use an amplifier per coil, it is the same as wiring the coils in series. When you wire the coils in series, end to end, you can see that you have 2x the windings of wire in the gap vs. just one coil.... simple. the more turns of wire you have in the gap, the higher the L portion of BL. if either B or L increase, the entire BL value will increase. When you wire the coils in parallel, the length of wire is the same as ONE coil, just because there are two runs of wire, it does not draw from the fact that they are connected at both ends, thus just being ONE thicker wire running through the gap. Now that the single parallel wired coil is double the area of the series wired coil.....the number of turns is effectively half that of the series wired coil, Halving the L value of the product: BL. This raises the QTS which we all know is recommended for sealed enclosure over a ported version. as compared to the lower Qts version of the same subwoofer with coils wired in series, which electrically is more suited for vented application than the less restoring force parallel wired sub. did that come out in english? [/QUOTE]
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