atmasphere
Responses from atmasphere
| Slight hum in my amp. Is this normal? @almarg , that's true, and if you look at my initial post I mentioned that DC on the line can also be interpreted as a 2nd harmonic. Its pretty clear that filtering using a transformer is an inefficient method; a DC blocker is a lot cheaper!FWIW, ... | |
| Amps Atma-Sphere M-60 Mono blocks OTL design If you put the ZERO after the crossovers then the crossovers won't be operating the way they were supposed to. So before.Now if I got this right, your speakers are home made? Could you build 16-ohm speakers? Then no need for the ZEROs at all. | |
| Slight hum in my amp. Is this normal? @jea48 , I thought I did. One more try:DC on the line occurs when 1/2 of the AC line (for example, positive going portion of the AC waveform) is loaded while the other half is not.Space heaters or hair dryers on half power do just exactly that. So... | |
| Need Amp Advice ^^ :) that's pretty funny. You can't overheat the tubes in an M-60 like that!In fact on that speaker you could run the amp all day at full clipping and not do that. IOW your metaphor doesn't work in this case. The amp isn't towing a Bayliner or an... | |
| Slight hum in my amp. Is this normal? You can have DC on the line and oddly enough, it can be passed through transformers. It could also be considered a 2nd harmonic as basically its caused by loading on 1/2 of the AC line and so the AC waveform can be offset slightly just as if it we... | |
| Need Amp Advice We've got a number of customers that use the B&W 802s with our M-60s, so apparently its a rather tube-friendly speaker. Rather than going the brute force powerhouse approach, you might consider going the finesse route instead- it sounds like t... | |
| Has anyone tried resistor loading the primary of a MC SUT ? Ralph, whether it is only the phonostage that needs loading or also the cartridge is debatable. The general terminology is "cartridge loading". So adding resistors to primary should load and damp the cartridge. Actually, regarding whether its th... | |
| Amps Atma-Sphere M-60 Mono blocks OTL design It shouldn't as long as both are properly crossed over. The portions of the transformer's operation that are out of band with the crossover will see a fairly high impedance which will be transformed to a high impedance to the amplifier. Worth a tr... | |
| Measurements - Clearly Explained @erik_squires you may also find this article interesting (written by the chief engineer of ElectroVoice): http://www.dissident-audio.com/Loudspeakers/CriticalLSDamping.pdf | |
| Has anyone tried resistor loading the primary of a MC SUT ? There is little point to loading the input side.The reason is that most of the loading issues that you will hear are caused by the transformer itself and not what is driving it. The loading will be different depending on the cartridge used, but th... | |
| Amp current - how much high current to go for This speaker is relatively easy to drive (for example would be a good match with most of our amps, which are tube). I think you will find speaker placement to be a far better investment of your time than that spent looking for a new amplifier. How... | |
| Richard Clark $10,000 Amplifier Challenge - Why Couldn't Anyone Pass this Test?? Damping factor of the Macs is said to be 12. What, if any, difference in frequency response of my speakers should I hear due to the varying impedance curve?@dentdog with that much feedback, none at all. OTOH, the fact that the amp runs feedback me... | |
| Amperex 6SN7GTB does this indicate different manufacturing eras? Yes. To change the tooling usually was a pretty big deal. So its not like one tube could have been made a few days from the other one. It would have taken some time to change the tooling (which is n... | |
| Time for a new tube system. B&Ws are traditionally not tube-friendly speakers. IME, a fair bit of performance of the tube equipment in use in this system already is left on the table on account of the speakers being harder to drive.When shopping for speakers, look at wha... | |
| Richard Clark $10,000 Amplifier Challenge - Why Couldn't Anyone Pass this Test?? Then to just complicate what I said above, the current output of an amp comes into as well, to keep the said control over the speaker.This is a common myth. An amplifier can have a very low output impedance without having much ’current’. Ralph... |