atmasphere
Responses from atmasphere
| Amps Atma-Sphere M-60 Mono blocks OTL design ^^ Rear right and rear left are the input tubes, in parallel.They are part of a single gain stage called a differential cascode, common in solid state circuits but unusual in tubes- when we first started using this topology we were the first to do... | |
| Amps Atma-Sphere M-60 Mono blocks OTL design OK: you asked. A lot has to do with the speaker of course, but the feedback we have from customers is that if the two amps are on a speaker that is friendly to both that essentially it is as you surmise. But we get that a lot and not just with com... | |
| Short Lifetime for 6NS7 Tubes In the case of the MP-1, the CCS tubes can be GTs. They only have about 100V per section on them.The life test won't damage the tube at all. | |
| Amps Atma-Sphere M-60 Mono blocks OTL design Yes. | |
| It is a good idea to purchase a vintage tube pre-amp. @tubegroover , are these caps at the output of the preamp? If so, what sort of amp are they driving?A very common issue that faces preamp manufacturers is the value of the output coupling cap. This is often defined by the lowest impedance that the... | |
| turntable/cartridge for old 50's 60's rock records. There is no such thing as a cartridge that is better at rock than it is at some other form of music. The same is true of a turntable. | |
| Amps Atma-Sphere M-60 Mono blocks OTL design Not that I know of. The tube testers I've seen don't make that distinction. If in doubt treat the tube as a GT. | |
| It is a good idea to purchase a vintage tube pre-amp. @tubegroover , just FWIW, bypassing an existing coupling cap is often a bad idea. I don't doubt that you enjoy how the unit sounds now, but I strongly suspect that if you had cutf V-Caps of the correct value as used in the stock cj that it would s... | |
| XLR/RCA dilemma When we developed the MP-1 back in the late 1980s, there was still a lot of single-ended stuff around, so we set it up with SE recording outputs and SE monitor inputs, despite the preamp being otherwise fully differential and balanced from input t... | |
| When and how did you, if at all, realize vinyl is better? I will admit that ON AVERAGE digital files may be better than analog, because digital sources eliminate this whole issue.I've not found that to be the case! The fact that there are a lot of poor recordings out there has been going on a long time a... | |
| Amps Atma-Sphere M-60 Mono blocks OTL design @ozzy , make sure that 6SN7 that sits in the front by itself is a -GTA or -GTB. That particular position has more voltage on it and the older GT style tubes will have a shorter life in that position. FWIW the Russian and Chinese tubes marked 'GT' ... | |
| Any issues to be aware of if driving SET from a balanced source? There are two ways to do it if you want the amp to really get the full benefit of the balanced source:The first is with a high quality input transformer, which can convert from balanced to single-ended. Jensen is an excellent source for that.The s... | |
| Amps Atma-Sphere M-60 Mono blocks OTL design It sounds like ozzy has gotten the amps to work in his system.I have some tips:The most important tubes for the sonics are the ones at the input of the amp. The precise location varies depending on when the amps were built (the M-60 has been in pr... | |
| It is a good idea to purchase a vintage tube pre-amp. The Harmon Kardon Citation 1 preamp is excellent when properly restored. To find one like that would probably be more expensive than the preamps listed, but it can keep up with them easily. A very competent circuit!The Dyna PAS-3 is not a particul... | |
| Why do some tube-based power amps have back-panel replaceable fuses and others don’t? @rlmmessenger, do you know of such an amplifier?? |