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atmasphere

Responses from atmasphere

that first watt in a PP amp
It depends on the P-P amp, but most of them have increasing distortion as power is decreased below a certain point, usually about 5% or less of full power. So to compare against a SET amp, you want one that is maybe about 1/2 the power of the SET.... 
interesting phenomena in the cutting room
What's a True Expert Audiophile??Regarding 'accuracy': a big problem in knowing accuracy is your reference. I use an LP that I recorded myself, and having the master tapes know how its supposed to sound. So the LP is very useful in that regard- in... 
interesting phenomena in the cutting room
How difficult in terms of budget, contract etc to re-issue let's say Hank Mobley "Soul Station" or Oliver Nelson "Nocturne" from original tapes? Did you try any of a kind?To do this you have to gain permission to do the project (usually with som... 
interesting phenomena in the cutting room
The quality of the recording has more to do with the producer than anything else. We've done some projects where the recording was clearly not up to snuff but that is what the band or label wanted, and its client/vendor relationship. We've tried t... 
interesting phenomena in the cutting room
Hello Raul, The acronym 'TEA' returns 67 different hits on Google, none of which make any sense in your post.But I can say with a great degree of confidence that you are talking about recording challenges and not anything that is specific to the L... 
Tube preamp reliability vs SS?
Corrosion is something that affects semiconductors that does not affect tubes. This might take a few decades, after which its a very good bet that the device will be obsolete. Anyone that services audio equipment knows this all too well! 
interesting phenomena in the cutting room
Hello Raul, I didn't know there were new posts to this thread. I'm still trying to sort out this new format Audiogon is using and one of the things that is frustrating is it does not use a good 'new post' system!Regarding your comments, they were ... 
Tube preamp reliability vs SS?
You can't abuse a tube preamp via the input signal :)I play in a band as well and while I have technical skills, the idea that a semiconductor is going to fail on the road is not a happy thought- that bit of equipment is going to have to be dealt ... 
What the *#$@ happened??
I use an UltraResolution Technologies platform (sadly, no longer produced to the best of my knowledge) under my turntable. It employs a high grade marble, laminated to a high grade steel via a 1/2" thick constrained damping layer. It weighs 85 pou... 
Tube preamp reliability vs SS?
 It is easy to refurbish and maintain classic tube gear for decades while a lot of solid state gear is MUCH harder to find replacement transistors, ICs and op amps.Isn't *that* the truth! The hardest part about keeping older solid state gear ali... 
Turntable for life
I have a turntable that looks a lot like an old Empire 208, but it has a different platter pad, damped platter and the plinth is machined from solid aluminum. Its equipped with a Triplanar arm. Its been hard to beat. I've been running it since 199... 
Interchange with a 5751 and a 6FQ7.
The 5751 is a rough equivalent to the 12AT7.The 6FQ7 is the same as a 6CG7; the 12AU7 is similar but with 1/2 the plate current capacity. They use a different filament connections (the 6FQ7 is 6.3 volt filament with no centertap) so they are not i... 
8 Ohm Output into 4 Ohm Speakers
The amp will make less power and greater distortion. By cutting the impedance in half at the output, you are also cutting the load that the power tubes see in half as well. If you drive the amplifier hard, that will result in shorter tube life.  
Are class A tube amps similar to class A solid state ...
The issue has to do with the efficiency of the speaker and its impedance.As for the latter there is a simple solution, a device called the ZERO that will allow tube amps to drive the low impedances at high frequencies that are often seen in ESLs.T... 
Interchange with a 5751 and a 6FQ7.
What is the question??