atmasphere

Responses from atmasphere

DC leakage from power amps
The SPL meter sounds like a good idea.I think that would be a good idea too. 
Sweet Vinyl Sugarcube - I Want It!!!
I have to live with the ticks and pops@bondmanp it might interest you to know that many ticks and pops heard on LPs are not the fault of the LP but instead the phono preamp!If the preamp is unstable, it will make a tick or pop that is otherwise in... 
Why is good, deep bass so difficult? - Myths and their Busters
Clean bass needs a Q of 0.7 or less and two 15 inch woofers in most domestic settings. (4 x 12" woofers will be equivalently capable.) I rarely see this kind of setup on Audiogon so I don’t think many people are even aware of the issues raised ... 
Are future improvements in Amp/PreAmps slowing to a crawl?
^^ I have exactly that in mind :) 
Are future improvements in Amp/PreAmps slowing to a crawl?
@inna Why would a respected tube amp designer want to play with something very different?To see what is possible.Nelson Pass sold a kit very briefly that employed an output transistor known as a Static Induction Transistor or SIT. This was and so ... 
Are future improvements in Amp/PreAmps slowing to a crawl?
@kosst_amojanThe gold standard is class A and nobody has come close to building a class D amp that touches the qualities of class A. Even the very best draw very mixed opinions. Amplifiers are art. Every amplifier imparts distortion with some c... 
Value of Futterman Amps
If the amp is unrestored a few hundred dollars is the price depending on condition and tubes. If restored then you see the bigger dollars $1000-$1500.  
Are future improvements in Amp/PreAmps slowing to a crawl?
Our amps are really not spinoffs of anything. And they are tube. So I don't agree we're at the end of the line by any means...But to make it more interesting, we've been working on a class D amp of our own for which we're also working on a patent.... 
DC leakage from power amps
This problem is **not** caused by DC!!The speaker has crossovers that prevent the midrange and tweeter from seeing any DC- even if the amp had a serious failure that put out so much DC that the woofer was fried, the midrange and tweeter would stil... 
PHONO PREAMP
its output impedance is so high that only speaker has reasonable punch driven by those type of otl amps is eletrostatic speaker. Furthermore ,even after extentive mod, atmaphere amps longtail differential driver stage is too weak (guess which ... 
which is better? Stereo Amp or Monoblocks?
@blindjim Topology isn’t always the big deal with some amps, say tube amps for example. There are tube monos running sE only. Very nice ones. There is a very good argument which paralelles this thread…. Fully differentially balanced or single ... 
DIY power cord / cords - really good
Just a little warning: solid core AC power cords are illegal for sale as they can be dangerous to operate. If the solid core breaks there is the potential (pun intended) to short to other parts of the circuit. The cable is most likely to fail at t... 
which is better? Stereo Amp or Monoblocks?
@ mr_mWhat are the advantages of a loudspeaker system with a 16 ohm nominal rating???All amps have less distortion driving 16 ohms as opposed to 8 or 4. Tube amps in particular will not only have less distortion, but (if transformer-coupled) will ... 
PHONO PREAMP
Stay away from those phono  stage using 12au7s. High end tube gain stage should not use those cheap tubes w/ high output impudence and non-linear gain. High mu tubes may not Sound smooth as directly heated tubes, but at least be able to drive e... 
which is better? Stereo Amp or Monoblocks?
+1 for stringreen.The thing is you have to qualify any answers with 'all other things being equal'. If you do that then monoblocks are the clear winner. One advantage is you can place them by the speakers and keep your speaker cables short. This c...