atmasphere
Responses from atmasphere
| Why are my woofers pumping? Your cartridge has a compliance value that is too high for your arm. You could reduce the effective mass. That can be done with different weights on the counterbalance (a heavier weight, closer to the fulcrum), lower mass arm or a lighter cartridg... | |
| Phono Preamps with "balls" ? It could be a good alternative in your designs instead the out of production devices you were using.We don't use any out of production devices. We have an internal design rule called the 20-year rule that prevents us from doing something like that... | |
| Phono Preamps with "balls" ? @jcarr Apparently raul missed that comment about the MAT-12... | |
| A Question on Speaker Driver Efficiency This is exact quote from cj1965 post:In theory, half the voltage applied to a driver will result in half the sound pressure in the output (-3db). Res ipsa loquitur, huh?Obviously he didn't actually do the math, but based this on belief instead- th... | |
| Decware and SET Low Power Tube Amps with Hi Efficency Speakers Both the Decware and the ZUs respond well to a little more power than most SETs can provide. A lot depends on the room- how lively, how large, how close you are to the speakers, and your own tastes.One dealer of ours was using our MA-1s (140 watts... | |
| Phono Preamps with "balls" ? @jcarr I agree that jfets are the way to go- although I like some of the aspects of the MAT-12s (which are bipolar, but a popular goto for phono front ends), getting them to actually sound right has been a problem so far. The jfets I want to use t... | |
| Phono Preamps with "balls" ? first that the phono-preamp has enough gain for the cartridge output level and be by preference a SS ( bipolars. ) design with no single tube inside, second that be an active high gain design FWIW, it is a lot harder to build a solid state phon... | |
| A Question on Speaker Driver Efficiency @timlub +1 | |
| A Question on Speaker Driver Efficiency Each is not absorbing 1/2 watt when placed in series (with the required 2.83 V applied) and the net acoustical sum of output is approximately 97db - not 94db. Two obvious errors in one sentence. The math doesn't lie and frankly, I'm getting a l... | |
| A Question on Speaker Driver Efficiency I'm the only one in this thread actually citing equations based on Kirchoff's law while you hand wave generalizations about tube amps. Really? Hand-waving seems to be what you are doing with this quote...Somehow you don't seem to make the connect... | |
| A Question on Speaker Driver Efficiency This jives with measurements I've made of acoustic output of drivers in series. Sounds like you are running a solid state amp. Solid state amps, generally speaking, are usually built to behave as a voltage source. If that is the case, it will make... | |
| A Question on Speaker Driver Efficiency Incorrect? Really? In theory, they move at EXACTLY the same time only when no capacitance exists in the circuit. Current through the coils is the same at any given time only when the circuit doesn’t have capacitance. We know this is not the cas... | |
| A Question on Speaker Driver Efficiency One last question for everyone...- In parallel - each driver would move at EXACTLY the same time (pretty much)- in series - would the second speaker in the "chain" be moving slightly behind the first speaker due to lag time through the voicecoil... | |
| Connecting a unbalanced output preamp to Krell FPB350 balanced amp I have tried Option #1 with the screen connected to pin#1 at the XLR end and as a second experiment with the screen connected as above and also tying the screen to the return at the RCA end. This second method helped to drop the hum but it was ... | |
| Tube Preamps..... I would concur with recomondarions on preamps based with 6SN7 tubes. There is something special about this tube type, and there is (relatively speaking) a great selection of old tubes that you can roll with terrific sonic changes. Something SS ... |