MoFi Sourcepoint 888 Speakers


I recently found myself with a little extra money, and after some thought and having read so many positive things, I decided to try a pair of the Sourcepoint 888's. I had actually been set on a pair of JBL HDI 3800's, but I couldn't find a set in my price range as they were closing out remaining stock, and they were all the more expensive black lacquer.

Anyway, the MoFi's seemed to fit the bill. I was looking for a gutsier mid-bass, the one failing of my current speakers (Odyssey Kismet Reference), which are actually wonderful otherwise. Still, mid-bass is responsible for some of the oomph and forward momentum in music, especially rock, so my search began. Besides the reviews having seemed to be a good match for what I was looking for, I had a certain amount of faith in Andrew Jones, knowing that he has designed some very good speakers.

I have only had them in my system for a couple of days, so of course there will be a few months of system adjustment as well as the difficult mental adjustments that take place when you (or at least I) get new speakers. That said, I really think that these are wonderful at reproducing music. They're very full bodied, but not at all slow or sluggish, and voices are a bit larger than past speakers I've owned and very intimate, with a level of detail that I haven't had before, but without any exaggerated treble. 

Bass is as advertised, very good. Solid, deep and impactful. It isn't loose at all, which didn't surprise me since the woofers have rolled surrounds which are pretty stiff, and he came up with a scheme of opposing magnets at the voice coil (no, I don't really understand it) that is supposed to make the movement of the driver much more controlled.

It'll be a good while before I can really know the speakers in and out because it always takes me a while to get the comparative sound of my previous speakers out of my head, but I am really enjoying these. I'm also wondering what other member's experiences with them have been.  

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Impedance and phase angle.  

 

**Interpretation of Phase Angle**

- **In-Phase**: A phase angle of ( 0^circ ) (or ( 0 ) radians) means the voltage and current are in phase, resulting in maximum power transfer.
- **Out-of-Phase**: As the phase angle increases or decreases away from ( 0^circ ), it indicates that the current and voltage are out of phase, which can lead to reduced power transfer.

**Power Factor**
- The power factor (PF) is related to the phase angle:
[
ext{Power Factor} = cos(phi)
]
- A power factor close to 1 indicates that most of the power is being effectively used, while a power factor closer to 0 signifies greater reactive power and inefficiencies.

### Summary
The phase angle is directly related to the impedance of a circuit. It provides insight into how voltage and current interact within the circuit, influencing power factor and efficiency. Understanding this relationship is key for designing and analyzing AC circuits effectively.