georgehifi
Responses from georgehifi
| Lightspeed Attenuator - Best Preamp Ever? Paul one of the tube guru's on diyaudio said the solid state part is at the input, and it's even stated that the 12AU7 in cascode mode is directly attached to the rca outputs in the manufacturers blurbs on a website. I asked what other preamps use... | |
| Lightspeed Attenuator - Best Preamp Ever? Try to bear with me here and let it sink in.You see this impedance matching goes right through the whole system between components. EG: source to preamp, preamp to poweramp, and poweramp to speakers. Even the internal stages of the individual comp... | |
| Preamp for Pass Depends which Pass amp, a lot of the Passlabs poweramps are very low input impedance, which are not very freindly to most high output impedance tube preamps. Do your home work first the output impedance of the preamp should be at least 3 x or more... | |
| Lightspeed Attenuator - Best Preamp Ever? You do have a bad match Teayjay with or without the use of the Bryston Xover, and what it shows is that when you said you tried the Lightspeed Attenuator you also put it into that same bad impedance matching situation. With or without the Bryston ... | |
| Lightspeed Attenuator - Best Preamp Ever? Also if it is feeding any of the Bryston Xovers this is the same bad match 15k or 20k input impedance depending on model, one needs to do their homework before spending the big bucks. | |
| Lightspeed Attenuator - Best Preamp Ever? Sorry correction, XA60.5, it is the same 20k for the single ended input as the XA100.5 | |
| Lightspeed Attenuator - Best Preamp Ever? 09-17-11: Grannyring Actives also need to be well matched with the amp. My cuurent tube active was a poor match to the Sunfire Signature amp which has an input impedance of 24k ohms.GrannyringYes Grannyring, tube output active preamps are just as ... | |
| Lightspeed Attenuator - Best Preamp Ever? 09-17-11: Banquo363I should add: what else should we look at other than impedance matching concerns.If the impedances are right, nothing, so long as the dac or cdp has volts high enough to clip/overdrive the poweramp which nearly all have, and eno... | |
| Lightspeed Attenuator - Best Preamp Ever? Pubul57: Raises the question as to the the "effects" are, and when is gain "necessary". Pubul57:With today's sources, cdp, dacs, even phono stages, there is clearly no need for added gain in most systems. As what most sources can give out today in... | |
| Lightspeed Attenuator - Best Preamp Ever? Paul just looked at your system, that is a Esotar D330 tweeter in your speakers? I fell in love with that tweeter when I listened to a pair of Sonus Faber Extremas, it was the first time I liked the sound as much from a dynamic tweeter as my prefe... | |
| Lightspeed Attenuator - Best Preamp Ever? 09-16-11 Agear: George, does Cadmium have a sound? Is that part of the reason why it is perceived as superior to carbon or metal? What specific measurements or measurable parameters separate the LSA from other passives or active pre-amps? :09-16-1... | |
| Low damping factor but fast& high current SS amps? Zuio: If you want a lower damping factor less than 100 on an amp that has more than 100, all you have to do is put a series 10watt resistor on the + terminal and the speaker wire on the other side of that resistor. To get a damping factor of 50 on... | |
| Lightspeed Attenuator - Best Preamp Ever? Hope all the testosterone has now been depleted.Your question Unsound:George, perhaps you would discuss the balanced issue?:UnsoundBalanced can be done, for the diy'ers, but to manufacture it, it would be a nightmare, as to do match a quad set whi... | |
| Lightspeed Attenuator - Best Preamp Ever? It actually only becomes a gain reducer when the input impedance of the poweramp is lower than the output impedance of the preamp.Cheers George | |
| Lightspeed Attenuator - Best Preamp Ever? Paul, think of it this way, you have 4 lanes of peak hour traffic coming into two different cities, one of the cities has a bridge that can take all 4 lanes into that city without any speed reduction to the cars,. the other one has less lanes on t... |