atmasphere
Responses from atmasphere
| Soundlab speakers with sub woofers? The right amp is what makes for bass on a Sound Lab. Generally speaking, transistors are not a good match. The reason is the Sound Lab, like most other ESLs, has a 10:1 change in impedance over its range, and is over 30 ohms in the bass, making it... | |
| Metal "whiskers" on cartridge body We had a customer that pulled some 'whiskers' off of his cartridge... After that the cartridge never made another sound. After that he never did that again. | |
| Gain of line preamplifier Just a raw shunt by itself does not make for a good volume control due to the problem you just described. The source really needs to see a constant load regardless of the volume control setting, otherwise the control will take on tone control aspe... | |
| Gain of line preamplifier Thanks Al, I can think of a few more nits, for example analog volume controls are not linear, so the halfway point is anything but half of the control! I was assuming a traditional potentiometer, which is a series-shunt configuration. Our output i... | |
| Gain of line preamplifier A common problem with passive controls (IOW variable output impedance) is a coloration at settings that are less than full output.This can be reduced in some situations by using a control that is itself a lower value, like 10K.You can't count on a... | |
| The HH Scott 350 A MultiplexCircuitry The big deal here is to make sure that the unit is properly aligned- for that you need an FM stereo generator- or your tech does.If I recall right, that unit can beat if its out of alignment- that 'grumble' you mentioned. If its not been done in a... | |
| Class A or AB amp for JBL S4700 speakers Dave, FWIW, your speaker is fairly easy to drive with tube amplifiers. You might consider that- generally speaking, the extra smoothness offered by tubes will be helpful when driving that midrange horn at higher volume levels. | |
| Amplifiers:A Keeper for Life. Do you know of one ? The semiconductors for the Eagle are getting harder to find. Some of them were tricky ten years ago. These days if you have an Eagle, consider that you may want to have the filter caps replaced in the next few years- they are now about 20-25 years... | |
| Why blind listening tests are flawed The need for blind tests illustrates to me just how little the bench measurements correspond to what we hear. If there was greater correlation, we would not need the blind tests at all. Am I the only one that sees the irony? | |
| Electrostatic Speakers My experience with ESLs is that they can be really seamless and fast, with great tonal balance and excellent soundstage width and depth. IMO the state of the art in ESLs are the Sound Labs. A recent change in their electronics has made them much e... | |
| Do You Have a Favorite Disk to Set VTA/SRA? I don't generally change the VTA once I have it in the right area (IOW, proper tonality, no breakup). The arm/cartridge resonance is far more important IMO; once that is right and you have otherwise proper setup, the SRA is not going to be particu... | |
| Do You Have a Favorite Disk to Set VTA/SRA? During the cutting process, the cutting needle lasts about 10 hours and then must be replaced. A worn needle cuts a noisy groove. Many people don't know this but if the cutter needle is set up right, the resulting lacquer cut is so quiet that no m... | |
| anyone tried psvane 12at7 Toothman, its the 2 tubes to the rear on the left side of each circuit board in the MP-1 that are the most important. So that would be 4 tubes instead of 8 if you just want to try them. | |
| Stand out phono stages Oldears, I also recommend tubes and passive EQ. Preamps with passive EQ often exhibit less surface noise from the LP, even though they might have the same bandwidth. | |
| atmasphere 6as7g output tubes. Sabai, you may be confusing the driver tubes (6SN7s) with the power tubes (6AS7G). I've been doing this a long time- I don't know if I have ever even heard of Mullard 6AS7Gs. |