donsachs
Responses from donsachs
| 300b lovers I like to listen at the volume a live performance would be at. Obviously, Pink Floyd concerts would be loud, but a jazz combo should sound like you are in the club at normal levels, not screaming at you. I will try to play at various levels whe... | |
| 300b lovers I have had the matching preamp running quite nicely for about 10 days and I will say the combination doesn't sound like anything I have ever heard. First off, with my 97 dB speakers you literally have to put your ear to the woofer to know the sys... | |
| 300b lovers I just have the first production one running in now in prep for Seattle show. It will be at least $5000 as it is cost and labour intensive and all very high end parts. | |
| 300b lovers @alexberger Hi I am sorry, but I am not giving anything about the design of the amp away. I had ITs custom wound for the project. My amp is PP, but if you need a load resistor with your circuit then I would try two kinds. A good quality wir... | |
| 300b lovers @drbarney1 I agree with Lynn in that I won’t work with power supplies over 550-600V. The teflon mil spec wire is all rated at 600-630V so you would have to source 1200V wire for headroom. All normal parts are rated at 630V so you would have to s... | |
| 300b lovers I would think the majority of people who buy class A amps of any sort are quite well aware of how hot they run and are more than happy to deal with it for the sonic benefits. As far as separate AC, that notion is absurd | |
| 300b lovers @pindac Exactly my friend, exactly. Once the power supply is right, all the operating points are right and there is some serious listening, then the tuning begins. We are almost there... | |
| 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... |