lynn_olson
Responses from lynn_olson
| Spatial Audio Raven Preamp I expect to be there for the Oregon Triode Society demo as well. Maybe I’ll meet some old friends ... I joined the OTS way back in 1990 or so, at the second meeting. Way too far to drive all the way from the Denver metro area, so I’ll fly again, ... | |
| Spatial Audio Raven Preamp That's why I was pleased to collaborate with Don Sachs, starting a couple of years ago. I already owned his preamp, and I was quite impressed he had decades of experience on the insanely complex Citation I and Citation II preamp and power amps. Th... | |
| Spatial Audio Raven Preamp I started my career in audio with the invention, patenting, and prototyping of the Shadow Vector quadraphonic decoder, back in 1973. That SQ/stereo decoder was specifically designed to preserve ambient cues and spatial impression, without adding a... | |
| Spatial Audio Raven Preamp Of course, things were a little bigger back then. This entire rack is one channel of amplification. Two racks were typically used, with instant changeover in case of failure while the movie was presented. | |
| Spatial Audio Raven Preamp One of the points of inspiration: the late-Twenties Western Electric Model 43A amplifier, used in the WE Mirrophonic theatre systems. | |
| Spatial Audio Raven Preamp Yes, I’m curious too. Oddly enough, even though I designed the Raven in 1998, I never actually heard one until the Seattle show last June 2023. Don and I agreed it was good to choose tubes that were (A) in current production from respected vendor... | |
| 40+ watts SET, cost is not a problem I agree with pretty much all the postings here. I think the owner of the new-series TAD speakers needs to be open-minded and willing to travel to audition these very expensive amplifiers. I would NEVER buy an amplifier unheard, and yes, they will ... | |
| 40+ watts SET, cost is not a problem Low-order passive crossovers (6 or 12 dB/octave) are less sensitive to amplifier output impedance (damping factor) than high-order crossovers (18 or 24 dB/octave). High feedback is the most direct method of reducing output impedance for both tube ... | |
| 40+ watts SET, cost is not a problem Hmm, well the Blackbird puts out an honest 22 watts, with half-second transient peaks probably around 60 watts. They power highly reactive electrostats with no issues, because of deep Class A biasing and zero feedback ... the load-lines for the PP... | |
| 40+ watts SET, cost is not a problem Most audiophiles who have heard tube amps have listened to "Golden Age" push-pull circuits that date from the Fifties, with a few modern tweaks like regulated supplies or a current source or two sprinkled through the design. A smaller number have ... | |
| Spatial Audio Raven Preamp They are custom-design Cinemag, optimized for our circuit. They are not off-the-shelf parts, which have bandwidth problems with the output impedance of the 6SN7. The 6SN7 is one of the best tubes ever made, but is not easy to match with most tran... | |
| Spatial Audio Raven Preamp I hope you folks like the Raven (which are built and sold by Spatial Audio Labs). It’s a miniature version of the power amp, with one stage of gain instead of three. It has both RCA and XLR inputs, with the balanced input going straight to the 6SN... | |
| Don Sachs Owners Thread The DS Valhalla and Kootenai are hidden gems. I didn’t design them, that’s all on Don, but Spatial is selling them at very fair prices, considering what’s inside ... point-to-point wiring, high-end caps, a classic circuit, and an all-octal tube li... | |
| Halcro update I find it interesting that an amp with ultra-low distortion still has scope for subjective "tuning" ... which makes me wonder how it's done. There's something in there the test instruments are not measuring. | |
| 300b lovers Well, keep in mind most LP’s were cut with spherical styli in mind ... specifically, the Stanton 681A with spherical styli. Over in Europe, it was the Ortofon SPU with a spherical stylus. Both were used to play the lacquer once for quality control... |