lynn_olson
Responses from lynn_olson
| 300B Tube Amps with 15/16 Watts Per Channel? There are oodles of 20 to 35 watt push-pull amps from the classical era of the 1950’s through the 1960’s. Most of the "mods" of these amps are nothing more than updating the coupling caps, which is a good idea anyway with an old electronic product... | |
| What Power Amplifier Should I Buy? Two subs increases bass headroom by 6 dB, as well as significantly reduces peaks and nulls from room modes. You can’t EQ out a null, which can be 15 dB or more deep, and worse, the nulls are in different parts of the room, so even measuring them i... | |
| Bose buys McIntosh Bose has every incentive to keep McIntosh and Sonus Faber intact, as "halo" consumer brands that command high prices from a loyal owner community. As long as the image is remains good, the two upmarket brands can be also be licensed for car stereo... | |
| Spatial Audio Raven Preamp I’ll amplify Don’s post. The last pair of pre-production Blackbirds are most likely the cheapest ones you will ever see. Spatial Audio Labs will try to hold the line on prices, but there are a number of imported parts in the Blackbird amplifier ..... | |
| Bose buys McIntosh I wonder if they enter the lifestyle market, like a McIntosh Dolby Atmos soundbar. Maybe with blue meters? | |
| Spatial Audio Raven Preamp I was thinking of the oddball use case of a wall-wart powered DAC driving a Purifi Class D amp module directly. Stupid, I know, but I bet some folks have tried it. I imagine it would (just barely) work. It certainly wouldn’t sound good, though. M... | |
| Spatial Audio Raven Preamp Hi Richard, that amplifier input load sounds very easy to drive. 1.5 volts to full clipping at 170 watts is very sensitive, and would require a quiet preamp. Any preamp, including ours, should drive it to ear-shattering levels. As for Ralph’s poi... | |
| Spatial Audio Raven Preamp So I doubt few, if any, designers of Class D amplifiers will use input transformers. The vast majority will use their favorite op-amp, or maybe try discrete op-amps designed for studio consoles. Boutique vendors that have a trademark "house sound"... | |
| Spatial Audio Raven Preamp Yes, the requirements for the input/buffer stage are actually quite modest, not even a headphone amp, really. But the current fad for floating 12 or 15V supplies from a switching wall wart limits the output swing and current available. Barely enou... | |
| Spatial Audio Raven Preamp True. I surmise leaving the input section of the Bruno Putzey modules as they are was a deliberate design decision on Bruno’s part. The modules are an almost-complete power amp, but are incompatible with existing RCA and XLR interfaces, due to the... | |
| Spatial Audio Raven Preamp Any info on your power amps? Input sensitivity (volts RMS to clip the amp) and input impedance should tell the tale. Transistor amps (with feedback) are typically 1~2 volts to clip amp, and input impedance is typically 10K to 22K. The Bruno Putz... | |
| DarTzeel’s new direction Using medium impedance (50 to 300 ohms) for line-level interconnects is a good idea, although not suitable for modern studio practice. And medium impedance for speaker outputs (1 to 2 ohms) is going to depend on the complexity of the speaker cross... | |
| DarTzeel’s new direction The oligarch market is probably saturated. This isn’t meant as a joke; with the Russians shut out of the West, there are fewer oligarchs around, so the market itself has fewer buyers today than five years ago. And it can’t be all that big ... mayb... | |
| Spatial Audio Raven Preamp We take for granted the very low prices of modern solid-state electronics. For a little perspective, look at the price of a RCA 21" color TV or Fisher FM/AM receiver in 1964. The cheapest color set was $500, and the receiver was $350. Wow, what a ... | |
| Spatial Audio Raven Preamp For better or worse, the Raven and Blackbird have high parts costs. Instead of a 1/4" thick sculpted aluminum faceplate (marketing!), we put the money into custom parts that are in the audio path. Pro-quality connectors, high-purity wire, custom t... |