First of all,
here is a link to # 1.
After many hours of measuring and playing around with PCD I finished the Ocelot a few weeks ago.
Here I will post pictures, measurements, simulations, XO schematic, etc. in a more organized fashion than I did in the first thread.
For a quick recap, the Ocelot is a 2-way bookshelf speaker 14" (H) 13.25" (W) 11" (D)
DRIVERS:
The tweeter used is the
Dayton RS28A which is currently priced at $54.75
The woofer used is the
Zaph ZA14W08 which is currently priced at $39.95.
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http://i.imgur.com/4achzP2.jpg)
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http://i.imgur.com/AfSDbQQ.jpg)
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http://i.imgur.com/oF4iN91.jpg)
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http://i.imgur.com/5mgg6f0.jpg)
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http://i.imgur.com/UPV5Y5i.jpg)
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http://i.imgur.com/a6j5tmo.jpg)
SIMULATION:
After playing around in PCD I determined the best place to cross for both on and off-axis response was around 1100hz. While this is quite low for a 1" tweeter with no horn or waveguide, this design was not meant to play loudly so I went with it. The result was surprisingly pleasing. I haven't listened to a whole lot of music since I have only built one speaker, but I am using the Ocelot as a center channel with my Philharmonics. When level matching with my Marantz SR6004 I discovered that the Ocelot sounds much closer to my Phils with regards to timber than does the BS22 I, at one point, was using as a center. While not capable of reference level SPL or quite the neutrality of my Philharmonic 2, the Ocelot mates very well in the center without much issue. When dialogue pans from one speaker to the next in my front stage it is not easily discernible with regards to timber, though compression can be heard with some passages and definitely with higher SPLs.
As far as SPL is concerned, my brother who loves to watch movies as if he were in the front row at an IMAX theater came over to hear my first speaker, and being insane, I allowed him to crank the volume knob towards "please, don't" and the Ocelot was fine. I was sure the tweeter would shoot out of the enclosure and hit him in the eye, but this was not the case; the Ocelot held its own.
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http://i.imgur.com/RXd77RX.gif)
MEASUREMENTS:
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http://i.imgur.com/wON6Eue.png)
While the on-axis measurement don't seem to track the simulation perfectly, previous measurements tracked very closely. This was a gated in-room measurement that I took quickly because measuring outside is a very painful experience. Unfortunately, I do not have the aforementioned measurement--it seems to have disappeared from my PC. Still, while not totally accurate, the on-axis FR still measures withing +/-2db.
*NOTE: Holm Impulse artificially rolled off the response of the RS28-A above 12khz. The actual measurements closely resemble Zaph's measurements as confirmed by REW.
CROSSOVER SCHEMATIC:
SUMMATION:
Considering the Ocelot was designed specifically for practice rather than a practical necessity, I am very happy with the way the design turned out and I am eagerly anticipating my next build!
If anyone has any questions or pictures they would like to see, let me know.
