Midrange at 1m
20 October
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Earlier I wrote about a measurement anomaly in the initial measurements of the baffle. Here is the response of the mid again, at 1m: Having just been trying to learn how to use the Edge simulator, I modeled an 80mm driver in a 300x900mm baffle, with the microphone at 1m distance. Look at this: So there’s the notch at 1700 Hz (more or less), in the open baffle simulator. It’s good that there is at least some match between theory and the actual measurement, although I still don’t understand why the notch is where it is, as I thought it should have been at aroundRead More →

6PEV13 Frequency Response
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20 October
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In Danika
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This project is aiming to build a dipole with more sensitivity and higher output than the Francesca prototype. Again, this is going to be a learning exercise and not the final product! Starting with the tweeter – upgrade to the regular (non-PDR) Neo3. This has about 3 dB more sensitivity, and a narrower dispersion pattern, which is actually what we want for a dipole. Also, I’ve read some comments online that it sounds better (in “naked” dipole configuration) than the Neo3PDR. So, worth a try then. Since the crossover to the tweeter is now at 5 kHz, I’m also thinking about trying a small compressionRead More →

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19 October
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Scene 1. A person goes to a particular room at an audio show to hear a specific component – a DAC. But… how would that person know how much of what was heard could be attributed to the DAC, in an unfamiliar room, with unfamiliar amplification and speakers? Scene 2. A person searches the audiogon listings for components on the Stereophile recommended components list. Not even necessarily Class A – they cost a packet – but if only a better amp or preamp or speakers or DAC could be found from anywhere on that list, things would be so much better. Scene 3. A groupRead More →

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18 October
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There are loads of DIY cable recipes on the net. You can go to all kinds of lengths in making your own cables, searching for and purchasing ever-more exotic combinations of conductor, dielectric, shielding, and connectors. But, to start with, something that’s easy to make and cheap (since you’ll probably make some mistakes initially) is needed. So here’s a little tutorial on how to make a really simple, dirt-cheap interconnect from easily-available materials. The interconnect I’m going to show here is quite short – around 25 cm. I never understood why the standard length for interconnects is a meter. Most of the time, the outputRead More →