atmasphere
Responses from atmasphere
| Ditching Class A Amps due to Heat - Sort of a Poll A big defender of Class D claims that Class A is going away on it’s own and would never become effected by limits placed on electrical consumption or heat output, but just because everyone no longer wants it or wants Class D or similar. I’ve be... | |
| SUT - electrical theory and practical experience Unlike a power amplifier, the frequency response of the RIAA implies a deeper feedback at high frequencies. Is this kind of feedback deep enough to work properly? @alexberger If in a discrete solid state circuit, maybe?? -a lot will depend on... | |
| SUT - electrical theory and practical experience I don’t know that the method by which a signal is transmitted in a transistor is any better than a transformer A FET works more like a valve/tube. If you like transimpedance (current based) amps, they are more than likely a BJT. The problem ... | |
| TMR: What is the Best Amplification for Magnepan Speakers? @akg_ca Wendel always made a point of telling me when we met at shows the best he ever heard the MG20.1s was with our MA-2s (that was about 20 years ago). He pretty well ran the company so you can draw your own conclusions. My point though is th... | |
| Amp pairing with Tannoy Turnberry? @mmcgill829 We have a number of customers using Tannoy loudspeakers. From what they report, its apparent that you benefit from more power on that speaker- 60 Watts being a good minimum, unless you have a smaller room! One of our Tannoy customers h... | |
| Help recommend a good tube preamp The Atma-Sphere has the output impedance you require, which needs to be at least ten times less than the amps input impedance. Too bad it's a boutique company though:-) CJ has been around a very long time. @jtcf FWIW Dept.: Atma-Sphere will cel... | |
| SUT - electrical theory and practical experience I used highly regarded Cinemag transformers with my Lyra Delos cartridge perfectly matched. The sound was energetic and loud but the treble was edgy and grainy. This is the tricky bit about SUTs. This sounds like a classic situation where the l... | |
| Advice on Repairs for Audio Research VT100 Mk II There are 8 power tube 100 ohm 5% 3 watt screen resistors. (Part # 43100208) ARC uses the resistors as fuses. The wattage value should never be increased. @fsonicsmith @jea48 The resistors should be adequate to survive a tube failure. Series ... | |
| Advice on Repairs for Audio Research VT100 Mk II I love the sound but the amp has needed two repairs within the first 6 months, so it's really put me off the whole tube amp thing. @edward78 FWIW, there are tube amps out there that don't require resistor replacement (which might mean a trip to... | |
| SUT - electrical theory and practical experience Look, the main SUT limtation vs an active high gain SS alternative is its way limited frequency bandwidth If you are using opamps, you'll need a fair amount of feedback and that feedback will correct phase shift. So even though an opamp can be... | |
| Buzzing from speakers on TT rig It was not a static issue but violent snapping popping as soon as you touched anything. @mofojo This is very typical of an ungrounded phono setup. You mentioned that it occurs when messing with the phono cable too Even through using only th... | |
| Advice on Repairs for Audio Research VT100 Mk II Yikes. 13 hours of time seems excessive for the damage. The resistors were damaged by the power tubes FWIW. Its reasonable to expect that every time a power tube fails a resistor could be damaged- and so will need another trip back to the shop...... | |
| Buzzing from speakers on TT rig This really sounds like the ground wire is damaged, possibly right where it connects to the phono section. | |
| GaN guitar amps? There are still some top notch players that don't use petals at all, Ronnie Earl comes to mind, I don't think this type of player will be switching to class D anytime soon. I don't either- mostly on account of the dearth of such amps to begin w... | |
| GaN guitar amps? When it comes to what players call “tone” it’s almost certain there will be an overdriven tube amp in play. @designsfx That was certainly true decades ago but now, not so much. There might be an overdriven tube, but that tube may not be in the ... |