4est

Responses from 4est

have i diagnosed my hum?
Is there a reason why you did not bias the amp for the new tubes? It would seem that is the plase to start, then as Rleff said, swap them one at a time. Do any of the tubes glow red at the plates as opposed to the heaters? 
Touch up rust spots in black steel speaker stand?
Along theo's lines, a dab of rust reformer (various brands, should be at the hardware or auto stores) should do the trick. They make it in spray cans and jars. Get a jar and use a q tip. It turns black, you may not need to top coat it. 
Digital out... does source matter?
No DAC is jitter immune, and the source is as important as the DAC IMHO. Even minute amounts of jitter can effect the sound of even a claimed "jitter immune" DAC. A transport that slaves to the DAC seems to fair be the best. 
Nova Phenomena vs. E.A.R. 868P
I'd get the 868/88 phono section myself. 
Optical Digital Audio Cable - Loose Fit?
Try a different cable if it is loose on both ends. 
Passive inline high pass filters?
These would most likely need to be made for you as function of the input impedance and the frequency you wish to cross at. Most likely this will sound better than using the sub's xover if you get it right. 
How is there Apple Lossless Debate?
Skip Wav files, use AIFF. I can hear a slight hardening of transients when using ALAC. I think something may be set wrong as Hellofidelity suggests. If his suggestions do not work, I'd try going straight into the DAC as well with the GLASS toslink... 
small room... tube amp... summer
The fan will just spread the heat around, you would need to vent it out of the room quietly. 
longevity of good speakers
A properly designed speaker should last a lifetime with a little maintenance. 
Anyone using Apogee MiniDac Firewire & Pure Music?
There is a free trial! 
toroidal power transformers?
The best iron isn't iron at all, but metallic glass! It's too pricey for most transformers though... 
Why not horns?
" I have yet seen or heard any speaker which can play loud with such low 0.3% THD. ""ATC claim this on their highest end designs such as the SCM300 while playing at 121 dB SPL (definitely loud). I am skeptical that they can actually achieve this d... 
Why not horns?
Honk, honk!Seriously though, some are pretty good if the system is voiced and implemented well. That said, most aren't plug and play as your room interaction is can be greater. 
How to manufacture a cable ?
It depends upon how many you are ordering at a time. 
Digital Cable : Copper, Solid Core, Unshielded
I wouldn't be surprised if that is the only one.