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Dedicated lines — how many? Other advice?
When I had one dedicated circuit I didn't have enough power. I have a big krell amp and a pair of apogee duetta 2 speakers that are only 80 db sensitivity, but they sound great. It also helps if you run your dedicated circuits at the top of the se... 
Dedicated lines — how many? Other advice?
I have tried one dedicated circuit for all my audio gear, but I've found that multiple dedicated circuits works better. You might get away with one dedicated circuit if your amp doesn't have much power. 
Class D amps seem poised to take over. Then what?
Man alive...The more time i spend here the more it feels like a bunch of geezers trying to hang onto the old tech and talk about how $5k cables augment sound.What do you think satellite TV comes from vacuum tubes. Satellites use vacuum tubes. 
Dedicated lines — how many? Other advice?
Run at least two dedicated 20 amp lines, you can always Revert back to one line if you think it sounds better. I have 6 in my dedicated audio room, and I don't have any ground loops. 
Class D amps seem poised to take over. Then what?
I don't think there is an amp made that can direct drive the apogee full range, the midrange when direct driven is .14 ohms 
Class D amps seem poised to take over. Then what?
Even the big high bias amps built with BJT's can't do it. When stereophile measures them their 8ohm full power measurements are a lot higher than the spec. 
Class D amps seem poised to take over. Then what?
These companies that claim double wattage when impedence is halved don't give the actual 8ohm measurement, which is usually a lot higher wattage than their spec sheet has listed. 
Class D amps seem poised to take over. Then what?
No amplifier can double it's wattage when impedence is halved. 
Class D amps seem poised to take over. Then what?
A lot of scintilla owners went from the big krell amps to the H2O and said it was way better. 
Wadia 321 DAC VS. PS Audio Perfectwave II DAC. Any thoughts ?
So, we have heard about wadia service and the wadia 321, but does it sound better than the ps audio perfect wave 2? 
Class D amps seem poised to take over. Then what?
yes, but is Class D stable into 2 ohms?Yes, they are stable into 1ohm, the H20 amp that Henry used to make was used with the apogee scintilla.   
Amplifier Break-in - It's Real
I would be interesting if someone bought a new pair of monoblock amps and burned in one amp and then compared the two. I bet the sound difference would be very audible between the two amps. 
Lousy IEC Connections
They all need cable risers.The power cable to my amplifier doesn't need cable risers, it goes straight from the wall to the IEC connector on my amp without even touching the floor.  
Your NOS tube favorites.
Just signal tubes or rectifier tubes also? I like my Taylor brand 866a Mercury rectifier tubes and the next best sounding rectifier is the RCA 1616 made for the US navy. 
First tube preamp recommendations (under $5k)
I’d stay away from some of the very boutique brands. If you decide to move on you may find it hard to sell.  If I were you I’d go for Audio Research. It’s well built, is desirable on the used market and sounds terrific! Even if the very boutique b...