atmasphere
Responses from atmasphere
| Low-sensitivity speakers — What's special about them? Al was a really nice guy. I miss having him here.A 86/87dB 1w/1m speaker referred to often as "low sensitivity" is only 3dB away from a 90dB 1w/1m - referred to as a "high sensitivity speaker".Although most of the post from which I extracted thi... | |
| Are all amps being built wrong? United States Patent Office. 2,773,136. Patented Dec. 4, 1956. 2,773,136. AMPLIFIER. Julius Futterman, New York, N. Y. Thanks!One of my business partners at the time had West Sound Lab monsters and used, of course, my amps. Sounded terrific (all ... | |
| GaN Amp & Speaker Popping Sound At Power On Is this induced speaker popping noise a concern for long-term speaker damage with many on/off cycles? Those of you with this amp or other GaN amps, do you experience a similar popping sound out of your speakers at powerup? Peachtree technical ... | |
| Are all amps being built wrong? @clio09 I'd love to see it! | |
| Are all amps being built wrong? In an effort to solve the oscillation issue in his first prototype and which you noted, one thing Roger found is Futterman himself omitted some things from the H3 schematic, specifically the lack of notation for the ferrite beads @clio09 IMO t... | |
| A turntable that plays all types of music well Yes correct Lenco is idler drive but looking for non idler replacement that plays all genres wellIts quite simply impossible to design any audio equipment for a particular genre. There are no speakers, amps, preamps, cartridges, tonearms, CD playe... | |
| 100W+ solid-state amps known for beautiful mids The best part though? The Quad 405-2 cost me $400. I've generally had in my mind that price correlated with quality (though not ironclad), but this recent pick up is seriously challenging my beliefs.High end audio isn't about price, its about in... | |
| Are all amps being built wrong? Julius Futterman solved the tube amp feedback problem by eliminating the output transformer. His OTL amps can have 60 db feedback with low output impedance and low harmonic/IM distortion. Yet remain 100% stabile into complex loads! This stateme... | |
| Power conditioner some say yes and some say no. Power in watts is volts times amps. W=VA. This is only true if there are no phase differences between the current and voltage. If there is a phase angle involved (inductive load) things might be quite different. | |
| 100W+ solid-state amps known for beautiful mids @hedonism What you are looking for is an amp with the right distortion signature. The warmth of the Pass is caused by a 2nd harmonic for example- similar to a lot of tube amps. If you talk to Nelson you'll find he's very aware of how the distorti... | |
| Are all amps being built wrong? Aside from what i already wrote, here's also the practical issue. A low impedance, hgih current amp will drive anything. This isn't quite correct, just so you know. Try putting your amp on a Sound Lab ESL sometime. That speaker is 32 Ohms in the ... | |
| Drummers! Which amps do you use for best Timing & Dynamics? If you're looking for the best natural sound setup for drums, you need to go Planar, as in Magnepan. No other type of speaker can compete with the speed and transparency of a Planar speaker. Planars with permanent magnets won't be as fast as a... | |
| Are all amps being built wrong? He did but it wasn’t absolute. He added a little resistance so it behaved more like a tube amp. This means it was LESS like an ideal voltage source and MORE like a current source, but even then there are limits to how well this can ever be done... | |
| Are all amps being built wrong? The power amplifiers that drive our loudspeakers are mostly built as a low impedance voltage source. They have always been ... but why?Loudspeakers have a (greatly) varying impedance over the frequency range. A current drive amplifier would eli... | |
| Power conditioner some say yes and some say no. That absolutely does not happen with isolation transformers.As long as you don't run them past about 50% of their rated capacity. |