2008年1月13日 · Perfect 8's name refers to the figure-eight dispersion pattern of a perfect dipole. The midrange and tweeter panels stand 79" tall. The tweeter is a proprietary 64" ribbon driver. The midrange frequencies are handled by seven, custom SEAS 7"-cone units. The passive crossovers is encased in matching boxes of semitransparent glass.

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2015年6月17日 · On the other hand, the $perfect$ dipole is a $model$ (or an approximation) for the physical dipole, where we consider situations like, $d$ $\rightarrow$ $0$. This may be useful when we calculate the dipole (or measure the electric field, $E$, or the potential, $V$) at distances, $k$, where $k>>d$, hence, as a result, we can simplify our ...

This explains the frequently heard "rule" that a dipole must be at least ½ wavelength high to work. The seeming anomaly with the beam width below 0.4 wavelengths is easier to understand by viewing the plots shown below. Analysis, End-Fire Direction: One frequently sees a dipole azimuth pattern depicting a very sharp null off of the ends of a ...

2011年1月14日 · I first encountered the glass-enclosured Force dipole loudspeaker from Perfect Eight, which combines a full-length ribbon with 8 cone midrange units and a subwoofer handling the load below 60Hz, at the 2008 CES. Their 2011 dem, with the speakers driven by Ypsilon amplification, was noteworthy for having invited Ray Kimber to talk about and play ...

23 October 2002 Physics 217, Fall 2002 8 Dipole vs. dipole: force and torque Griffiths problems 4.5 and 4.29: Two perfect (infinitesimal) dipoles p1 and p2 are perpendicular and lie a distance r apart. What is the torque on p1 (about its center) due to p2? What is the torque on p2 (about its center) due to p1? What are the forces on each, due ...

2024年5月27日 · A perfect dipole is an imaginary concept used in physics to represent a molecule or an object with a perfectly symmetrical charge distribution, resulting in a uniform electric dipole moment. In...

The dipole shell is a “perfect dipole.” Point Dipole If the source distribution is contracted to a point (preserving the same dipole moment p) the charge distribution can be represented ρ(r) = −p·∇δ(3)(r) This is nonzero only at one singular point r = 0 and it carries no net charge. By construction it still has a dipole moment p.

2012年1月20日 · The upper-frequency module is a dipole, allowed to roll off naturally to integrate with the subwoofer module below it, which uses two 10" drive-units mounted on its sides to cancel mechanical reaction forces.

2023年11月3日 · The MiniDSP Flex Eight offers 8 channels instead of 4 with significantly lower noise, with some other features compared to the 2x4HD. The 2x4HD has separate FIR taps on each output channel, which I take full advantage of in the Birch Dipole design.