atmasphere
Responses from atmasphere
| Can I tweak L-R balance by differntial biasing? No worries- if the bias is set correctly the amp *should* have the lowest distortion for the class of operation it is designed for.For example if an amplifier designed for class A is overbiased or underbiased, the distortion will be higher. There ... | |
| Bass leaves after amp warms up? Fishing, Have you tried putting a fan on the amplifier?Based on all that we have discussed, it does seem that heat plays a huge role. The fan should be able to cool the amp's heatsinks. | |
| Bass leaves after amp warms up? Al, 0.7 db across a spectrum can be quite noticeable to the ear, whereas on a sine wave is undetectable.You might normalize the two tracks, invert the phase of one and play them simultaneously, then you could hear the 'missing' bass. Csontos, I us... | |
| Tubes/SS Power Amps? We've been looking at class D for 9 years now. We have certainly thought about it. The preamps we make now would work fine with any Class D amp.The concerns we have had are: is class D a threat to our tube technology? Answer, yes, although not wit... | |
| Bass leaves after amp warms up? Csontos, you may have missed the post where Al found out that all three amps have bipolar output devices.My understanding of bipolars is that the hotter they get, the more current they pass- which leads to more heat. This is why they have to have ... | |
| Current - Class A vs Class A/B, various wattages To the fist question, if both amps are making the same power into the same load the current will be the same as well.The higher powered amp will be capable of more current at higher power levels.'High current' amps are usually those that can drive... | |
| turntable bearing lubrication With most 'tables and also tape machines, one of the best oils out there is automatic transmission fluid. | |
| What component is responsible for dynamics ? I don't think the human ear judges loudness in audio. Certainly we can sense loudness outside our listening room and there it isn't distortion.Tbg, sorry to be a buzz kill, but what you think above isn't really the way it is.*Of course* our ear/br... | |
| Bass leaves after amp warms up? Does anyone know if all the amps in question are MOSFET outputs?? | |
| Bass leaves after amp warms up? If the digital was unplugged, seems like we can rule that out as being a problem.Go ahead and restore the system.I realize I made a poor assumption. I would not have turned off the amplifier when messing with speaker cables. Most transistor amps d... | |
| Tubes/SS Power Amps? Orpheus10, amps in general are not supposed to catch fire :), tube or solid state.Sounds like that SS amp was overbiased and went into thermal runaway.The way to do the ventilation is to put one are two vents over the space that the amp/amps will ... | |
| Bass leaves after amp warms up? Mapman, the reason the amps are ruled out is because the bass can come back without shutting the amps off, in fact can come back without the system being messed with. It comes and goes.If the amps were the problem, once they had warmed up the bass... | |
| Tubes/SS Power Amps? Orpheus10, there are inexpensive ways of dealing with heat. You don't need air conditioning for starters, if you do it right.Now if you set up your system according to how much heat it makes, don't expect it to sound like music. If it does, great,... | |
| Bass leaves after amp warms up? Here are the things ruled out:speakersamps (3 amps used, from 60 to 200 watts/channel)hearingelectricalThe only clues are: bass might come back on its own or when messing with speaker cables.This points to another component. What happens if you li... | |
| Can I tweak L-R balance by differntial biasing? Thanks for the comments Swampwalker. FWIW, adjusting the bias not only does not affect gain, it doesn't affect the output power of the amp either. |