donsachs
Responses from donsachs
| 300b lovers These amps are still prototypes and being tuned as we speak. So what Cloud wrote was in reference to the first prototype a year ago. Spatial Audio Lab had that amp for maybe 6 months. The mono amps are probably 25-30% better at least. @whites... | |
| 300b lovers @atmasphere "There are now class D amplifiers that have a distortion spectra that if you had one on the bench you would be completely convinced you were measuring a really well-behaved triode tube amplifier." Maybe. Except that there are thing... | |
| 300b lovers You don't have to convince me, my speakers are 97 dB 8 ohm:) I wouldn't own an inefficient speaker because I would be doomed to SS amps, and I hate the sound of solid state devices. | |
| 300b lovers As Lynn said, the amps have dual regulated supplies, one for the 300b and one for the input and driver tubes. IF the specs on that KEF speaker above are really what the review said, then the amp would drive them. Also, as I said far above some... | |
| 300b lovers @curiousjim The speakers appear to be 8 ohm 90 dB from a stereophile review. They dip to 3.2 ohms, which isn't bad. The amps would drive them with no trouble in any reasonable sized room. I cannot comment on pricing until Spatial Audio figure... | |
| 300b lovers Link not working, no. There are some monos on ebay with no tubes for $2-3K per pair. SE amps. Typical Chinese amp in that you have no idea what is inside that transformer box. Could be ok, could be $99 transformers. A tube amp is the sum of t... | |
| 300b lovers @markusthenaimnut I have no idea. I think Lukasz at Lampizator was. Yes they will be pricey because the power supply topology is something that I have not seen in any commercial amps that I haven't built, and there are custom wound transformers... | |
| 300b lovers I am not sure the of the adjective @whitestix would use to describe the amps, but "trippy" is pretty much spot on. It is funny, because when I first wrote Lynn after building the initial stereo version with the CCS on each 6V6 plate I told him th... | |
| 300b lovers @gavin1977 No, sorry. The 2A3 is 2.5 V filament and 300V plate max. The 300b is 5V and the plates are at about 395 V in this amp. Not ever going to happen. What you have to realize is the 300b is a better tube for this purpose and people wh... | |
| 300b lovers To simplify.. All tubes have distortion. The higher orders are what are like fingernails on a blackboard to your ear. DHTs have lower levels of higher order distortion than other types of tubes, and good indirectly heated octals like the 6SN7 and ... | |
| 300b lovers This is getting dangerously close to an infommercial😉 Really, I have enjoyed the thread and never expected it to have this sort of life. I just received the final version of the preamp output transformers from Dave Geren at Cinemag yesterday a... | |
| 300b lovers @atmasphere So many paths to audio nirvana. So many tubes, so little time:) | |
| 300b lovers To distill much of the above. What struck me (well, Clayton and folks at Spatial Audio as well) with the first build of the circuit in a stereo box with a CCS on the plate of each driver tube was the purity of the sound. It didn't have a sound p... | |
| 300b lovers As I said, there are subtle complexities in what appears to be a really simple circuit when you first look at the schematic. I am sure the symmetric Reichert sounds great, but I am sure it cannot touch the current build due to all the improvement... | |
| 300b lovers Yes I am well aware of the debate and tradeoffs in interstage coupling in amps, but I am talking about the output transformer in a preamp here. It has numerous advantages over cap coupled output provided the transformer quality is superb and the t... |