lynn_olson
Responses from lynn_olson
| Spatial Audio Raven Preamp What you’re hearing is the Less Is More approach. A ultra-simple signal path, including the very straightforward cables. Wires, a switched resistor volume control, transformers, and triodes. | |
| "The Art of Speaker Design" by Lynn Olson Yes, I'm still around. My thoughts have changed a bit in the last twenty years ... there are some really good horns out there, and some dipoles too. Still trying to figure out how some of them work. | |
| Spatial Audio Raven Preamp Oh, Amtrak is still around, just with fewer routes. The Denver/Portland route went away about fifteen years ago. However, as part of the Inflation Reduction Act, Amtrak is getting some routes restored, which I look forward to. As for airports, DI... | |
| Spatial Audio Raven Preamp I got whacked with Covid after going to the Seattle show last year. Both the Seattle and Denver airports were overcrowded zoos, so I’m pretty sure that’s where I got it. Fortunately, Paxlovid knocked it out in about 36 hours. This time, I will NO... | |
| Spatial Audio Raven Preamp Yes, I plan to fly to Portland for the Spatial presentation and demo. This time I'll be sensible and fly Business Class, so I get decent legroom and seat width. And wear a mask at the airport. | |
| Spatial Audio Raven Preamp Links to the aforementioned articles: The Amity, Raven, and Karna Amplifiers These articles date back to 2004 or earlier, and some of my opinions have changed since then. The availability of custom transformers opened a broader palette of tube s... | |
| Spatial Audio Raven Preamp Nice that the Raven ticks all the boxes! Seriously though, you’ve pinpointed (better than I could) what separates the Raven from a conventional Marantz 7C re-creation. The preamps from the Fifties and Sixties followed a pattern of 2-stage 12AX7’s... | |
| Amp showing its age? Transistors don’t age. They keep working, staying within spec, and one day, fail without any warning. When that happens, as often as not, several other parts burn out as well (typically resistors). In other words, they work fine until they don’t. ... | |
| Spatial Audio Raven Preamp A pair of subs don’t need to be exotic or anything, just fill in the gap below the horn cutoff. And two are definitely better than one. I prefer stereo bass, but the home theater folks use a mono input to drive 2, 3, or 4. I don’t care about sound... | |
| Spatial Audio Raven Preamp I should add that all folded bass horns are tricky beasts. They only exist because a true straight bass horn that is flat to, say, 35 Hz, would be the size of medium-sized car. In other words, the size of an adjacent room. Two needed for stereo, o... | |
| Spatial Audio Raven Preamp The degree of overlap between the horns and the subs (at least two) will be entirely subjective. Unlike closed and vented boxes, horns do not have a smooth, predictable cutoff region (which is 12 dB/octave for all closed boxes, and 24 dB/octave fo... | |
| Spatial Audio Raven Preamp The Raven has split windings on the output transformer so both RCA and XLR’s can be used at the same time (the RCA output uses one-half of the secondary winding). So feel free to use to use the RCA output to power the active subs. However ... the... | |
| Don Sachs Owners Thread Don't know anything about the Dennis Had amps, but what you describe sounds like a bad pot, with a damaged area on the carbon track. Sometimes this can be resolved with plenty of contact cleaner, but if the track is damaged, the contact cleaner wi... | |
| Spatial Audio Raven Preamp I used to think that rules-of-thumb applied to transformers. Well, no. Maybe in the Fifties when they were designed with slide rules, but now you work closely with the designer and their simulation software, followed by a sample build. Model, buil... | |
| Spatial Audio Raven Preamp It might sound odd, but both the Geshelli and the Raven have a similar parts cost to retail price structure. Solid-state isn’t really that expensive if you buy the parts in hundreds to thousands quantities. And the expensive, heavy case with the 1... |