atmasphere
Responses from atmasphere
| Telefunken 6AS7 There were actually Telefunken 6AS7Gs. They are quite rare. If I recall right, they have brownish bases. OTOH, there *are* generic Russian tubes *marked* as Telefunkens!! So you have to watch it, and IMO you will not see any huge improvement with ... | |
| I have the dreaded hum If you have a ground loop it will be in both channels. This is usually caused by poor AC ground design. Since one channel is OK, that's not likely it. Based on what I have seen so far in this thread, the problem is somewhere in the phono section i... | |
| High-end amplifier clarification? Weseixas, We did a few Stereophile shows but none of them were in '94. There may have been someone there using one of our amps though.These days at home I use a speaker that is 16 ohms and goes to 20Hz. It uses field coil drivers with beryllium do... | |
| Explain Amp classes & how effects sound? In terms of heat:class A => hottest but otherwise the most linear/lowest distortion class A2 (tubes only) grid current may flow in the tubes during part of the waveform but the tube is conducting through the entire wave cycle. This allows for m... | |
| "Light Loading" Amps - Music Refence and others... Seems to me Scott made an EL-84-based amp that made 25 watts. It too was class AB1. To get 35 watts though would require one to jump through a lot of hoops design-wise (most EL-84 designs don't make more than 17-20 watts, but a good portion of tho... | |
| "Light Loading" Amps - Music Refence and others... I suspect that Roger has a really robust driver circuit in the RM-10. IOW, its probably a class AB2 circuit.Depending on the way the transformer is spec'ed out, I could see a loss of 50% or a loss of 20% of power if you 'light load' the amp. We bu... | |
| High-end amplifier clarification? Weseixas, some of the best speakers I have heard are much more than 4 ohms. Just so you know, our amps can do a 20 Hz square wave with no measurable square wave tilt, which will not be the case with an amplifier that cuts off at 10Hz.The point of ... | |
| Phono stages anecdotes. What would be considered a trend setter? I suppose maybe our MP-1 was, as it was the first phono section (1989) with a balanced input, and pretty well defined how balanced was done with phono. | |
| Zu Soul Superfly One thing is sure- you won't have any troubles getting a set of ZUs to rock. Totems on the other hand- all the ones I have heard have needed a lot of power to get going, but once they did have that power, they did quite well. Overall though the ZU... | |
| How many tube watts for Vandersteen 2's? Pubul57, the act of increasing the bias on the tubes has the effect of reducing their output impedance. This will change the relationship they have to the output transformer.In addition, you have to also consider how the amplifier was designed. Fo... | |
| High-end amplifier clarification? Sound is very subjective, one man's euphoria is another' anathema. An amplifiers job is that of an voltage source, expensive high end amplifiers that cannot replicate such, is well ................A Pretender.Weseixas, so you exclude Nelson Pass??... | |
| Zu Soul Superfly The loading on the bottom of the speaker is critical IME. If incorrect, you simply are not getting all the bass the speaker has. | |
| open baffle speaker question 'Open baffle' usually refers to a cone speaker mounted on a baffle with an open back. Quite often this means there are no sides to be baffle either but that sort of depends on who you talk to.Technically speaking all planar speakers are open baffl... | |
| Who Has A Musical Concepts Dynaco PAS 3x Tricked We first started updating and upgrading the PAS-3 about 25 years ago. One thing is for sure, if done properly the preamp can be a giant-killer. However there a lot of people doing mods on the preamp, so YMMV as how successful the mods will be.If I... | |
| How many tube watts for Vandersteen 2's? If you use the 4 ohm tap on an amplifier with a speaker of higher impedance, the output transformer will be inadequately loaded, and so it will express less of its winding ratio and more of its inter-winding capacitance. This can result in the amp... |