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blackdoghifi

Responses from blackdoghifi

Avoiding US dealer markups
It’ll be a 240v unit. So it will need to be converted to 120v. Shipping is not inconsequential, and there may be duties and taxes. Your warranty is probably void too.      
Thinking Hybrid Integrated.
Copland CSA100, CSA150. Any one of the Unison Research hybrids.  
6922 Tube Question
6FQ7 for me. Not the same tube at all. Different gain, voltage ratings, and bottle length. It is a 6SN7 in a 9 pin bottle.  
unison simply four no sound
Most likely a blown plate voltage fuse.  
Life of KT 150 Tubes
Vishu,  Where are you located? I'm not sure why Motet would send you out to Edmonton. I do a lot of work for them, including all they're tube work. Send me an email, we can discuss..      
Woofer pulsating with no volume , Oscillation issue?
It could be nothing more than a bad tube. Try swapping them left for right first. Start with the power tubes. If it doesn’t follow the tubes, then most likely needs service. I should add, the woofer pumping, and the bias bouncing around are mos... 
Cartridge Loading for a phono pre amp
I've always found Benz cartridges are happiest with higher loading. I would start with the 1k load and work down. Experimentation is needed though. You won't hurt anything by trying different loads.      
1st Tube amp question
always have a load on a tube amp. Why would would you want to waste tube life (a very finite thing) breaking it in. Just sit back and enjoy the music.      
Tube Amp question:TUBE replacements: explain MATCHED?
In the case of your amp, all four KT88's are biased at the same time. If they are not matched for current draw, you may have one or two drawing more current than the others. While the total may be correct,  the individual tubes will be running at ... 
what does this mean?
DC coupling has nothing to do with an output stage being bridged. You should always shut down fully when attaching cables. Shorting cables is the worst thing you can do to a live solid state amp. Although I wasn't aware the XA25 was a bridged desi... 
Audio valve preamp
How did you come to the conclusion it is the preamp? Could be something else in your system causing the imbalance?    
It comes with a balance knob?!?! I'll take it!
I make a headphone amp with a balance  control. I had one customer ask for it just because he thought he needed it, and another that has a hearing problem in one ear. Depending on what he's listening to he has to adjust balance.  Turned out to be... 
Luxman L505uXii or Hegel H390
Both are fine amplifiers, but you are comparing apples to oranges. What kind of functionality do you need. The Luxman is more on the analog side, or somebody who has multiple sources. The Hegel is more on the digital side with its built in DAC an... 
Swapping Kt88 tubes on muzishare x7 for Kt150
Stick with the tubes your amp is designed for. You won't get any more power. You won't extend the bass at all, and you run the risk of destroying your amp. Filament current is higher with the KT150 over the 4 tubes it could be as much as an extr... 
6H30 replacement
Pesky, while the specs look close, the 5687 is not pin compatible with tbe 6H30.