atmasphere
Responses from atmasphere
| ??? WHY WHY WHY ??? Class A vs Everything Else Ralph, I hate to disagree, but a pure Class B amp (like the Quad 405), switches from the upper set of transistors to the lower set with no region where both are operating. @lynn_olson I hope you understand that I am familiar with classes of ope... | |
| 300b lovers The measured frequency response of this transformer (with 6f6) in my amplifier is 6Hz to 90KHz -3dB. @alexberger while that looks excellent, I suspect these measurements at the link are not at full power. If you want the amp to perform, full po... | |
| ??? WHY WHY WHY ??? Class A vs Everything Else (AB) Significantly higher efficiency, greater power output (typically 3X or more) and an implied requirement for local or global feedback to linearize the switching transition in the output devices. @lynn_olson I think most people haven't thoug... | |
| 300b lovers @alexberger If I were you I'd be concerned about the current for a driver tube that must pass through the core of the interstage transformer. That current is DC and causes the core to be magnetized. That in turn leads to saturation which increas... | |
| ??? WHY WHY WHY ??? Class A vs Everything Else You can thank the designer, not the class of amplifier. This. As long as the amp has a decent distortion signature it will sound pleasing regardless of the class of operation. There are now class D amps that rival the best class A tube and s... | |
| Has anyone switched from Class AB/A to Class D? Was it better? Was it worse? in my 40y + sound works I haven’t seen such speaker, with purely resistive load (2/4/6/8/12/16)! In order to design output filter properly, we need to take complex model of loading, including variety of speaker cables, DC protection relay ckt, spe... | |
| New preamplifier - Backert Rhumba Extreme, Aesthetix Calypso Signature, Ayre KX5 Twenty if I recall correctly if you make any volume adjustments while watching a “movie” the entire system does not stay “in sync”. @dotto81 IIRC the volume of the home theater processor is controlled by a remote. It feeds that signal to the preamp. If... | |
| New preamplifier - Backert Rhumba Extreme, Aesthetix Calypso Signature, Ayre KX5 Twenty I sent an email to LTA asking for recommendations for a work around to the HT bypass shortcoming. @dotto81 The solution is very simple. Find out what volume control setting satisfies the home theater setup. Use that setting when using the home ... | |
| Has anyone switched from Class AB/A to Class D? Was it better? Was it worse? @westcoastaudiophile You might try the AGD Audion, one of the Orchard Audio amps or one of ours. WRT to the analog filter, its job is to remove the switching artifacts that occur at the switching frequency. What is left will be a sine wave called... | |
| SUT Interconnects Curious how one measures capacitance of an interconnect? @rsf507 By using a meter which measures capacitance. You treat one connection as one lead of a capacitor and the other connection (perhaps the shield) as the other lead of a capacitor. | |
| New preamplifier - Backert Rhumba Extreme, Aesthetix Calypso Signature, Ayre KX5 Twenty I listen to a wide variety of music from Jazz to Blues. Classical has been finding its way more into my rotation. @dotto81 Your taste in music really should have no bearing on the choice of preamp! The electronics do not care what the genre is... | |
| Has anyone switched from Class AB/A to Class D? Was it better? Was it worse? You may dial 500mW output @ 1kHz sine on any D class and A class amp and compare waveforms to understand D class problems better! @westcoastaudiophile Actually there are a few class D amps that have a better first Watt than a good number of cla... | |
| Has anyone switched from Class AB/A to Class D? Was it better? Was it worse? But tubes are not something I hear and can easily go to a class D system unless heat or space is the consideration. A preference for tubes is in a class by itself. The differences are easily distinguishable in a blind test. SS v tubes, if you... | |
| Class d amplification Class D cannot outperform a great AB amp. @vinylshadow That was probably true a few years back. But these days it isn't by any metric you might find important (imaging, depth, smoothness, musiocality, distortion, etc). I heard a class D at AX... | |
| Stereo to mono bridge/phase inverter for AVA ST70 amplifier I have 2 AVA ST70 amplifiers that I want to use as mono. @rommel If the ST70s have the mono/stereo switch, put them in mono. Then parallel the outputs by connecting the 16 Ohms together if you are using 8 Ohm speakers, or the 8 Ohm taps togeth... |