atmasphere
Responses from atmasphere
| Let me end the Premp/Amplifier sound debate ... Voltage from a tube amplifier OPT will vary considerably depending on the speaker impedance at the test frequency. @ieales This statement is incorrect. This amp uses about 15 dB of feedback, allowing it to behave as a voltage source with most s... | |
| Help with choosing sub-woofers please The 14 foot wave takes 12 milliseconds to pass my ear. Is that fast or slow? My MLs are flat at 80Hz and the bass there is pretty tight, not an unrecognisable reverberating mush. @clearthinker Don't worry about the speed- that has nothing t... | |
| No more "High End" for me...Back to Reality Audio what do you think lightning strikes cause?? In my world lightning strikes are different from power surges, which are caused by the power company. One way a power surge can occur is if there is an interruption of power, the magnetic field in th... | |
| Help with choosing sub-woofers please Many say bass isn’t very directional below about 50Hz. But bass heard above that on the MLs is certainly directional * To what extent will the sound deadening deal with room modes? Some say bass waves go straight through wall treatments back to ... | |
| No more "High End" for me...Back to Reality Audio But it sounds FANTASTIC...You can't believe 8 watts into KEF LS50 Metas would even work, nevermind sound like it does.....Something is wrong with the whole High End HiFi picture..... @rbertalotto Not really: there is a reason Nelson Pass name... | |
| Atma-Sphere Class D getting some love Yes. | |
| Is rectifier tube arcing a problem? Say from 220uf to 100 instead of going all the way down to 47uf. @fiesta75 You work out the timing constants. The amp likely does not have a timing constant in the audio circuit that is less than 5Hz since the output transformer won't go down... | |
| Atma-Sphere Class D getting some love I wonder if the amps pair well with tube preamps, and if so which ones are good candidates. The input impedance is 100KOhms single-ended or balanced so will work with any tube preamp. | |
| Is rectifier tube arcing a problem? thank you very much. A couple more questions: 1) is it able to tell from the diagram if there other rectifier that can be used and handle the current drawn by the 220uF capacitor? 2) is it necessary or recommended to change the other two capaci... | |
| Let me end the Premp/Amplifier sound debate ... He said 'an amplifier is a straight wire with gain', defining his belief that 'all well designed amplifiers sound the same'. @clearthinker When he said that, apparently no 'well designed amplifiers' existed- they all sounded different! On top o... | |
| Is rectifier tube arcing a problem? Yes, mine also has 220uF capacitor, and yes, the arcing only happens when the amp is turn on. After than, and if the fuse doesn’t blow, the amps sound fine. Nailed it! I would replace the capacitors after the choke with 50uF devices rather tha... | |
| Let me end the Premp/Amplifier sound debate ... These alleged sonic difference between power amplifiers, are they musically significant? They can be! I think the mistake that Julian Hersch and a lot of the folks over at ASR were/are making is arbitrarily deciding how low distortion has to be... | |
| Is rectifier tube arcing a problem? If it is, that 220uF value seems really high to me! An SET is a class A device so the load on the power supply is constant. If you cut all those values in half I think you’ll find that the rectifiers hold up just fine. This appears to me to be a ... | |
| Linlai E 6sn7 tubes I have the Shuguang Treasure 6SN7s on my Don Sachs preamp. Don says in his website that these simply walk away from the holy grail NOS tubes. That's quite a statement. Obviously this is not the case with all NOS tubes...as a lot of the culture t... | |
| Is rectifier tube arcing a problem? min the diagram, I need to add two diodes per tube, am I correct? Yes. I agree something is up in the amps- the 5U4 should easily handle the load all on its own. It sounds like something is causing an excessive load during warmup, which is a c... |