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In Reply to: RE: Raising gain on 12AU7 input tube. posted by Cougar on September 27, 2016 at 10:45:47
Is to have the lowest overall system gain that still satisfies your volume spl requirements. Listening at "10" will give you better sonic nirvana than listening at "3" because you are not throwing away so much of the signal.
Follow Ups:
I having to put the volume control now at the half way point. I would only go as high as 10 before. My speakers are 91db. I guess I just need to get going on building the 2 way horn speakers now.
The only problem would be if you cannot turn it up loud enough to satisfy you. If that is the case, you probably need a preamp that has some gain. A lot of people have a problem with the 12AU7 tube, they have a "bias" against it more than just its gain structure. I don't seem to think it is that big of a sonic penalty.
Since it has double the current output than the GZ34. This should fit my need. Just 1 or 2db increase would fit my need. When I listen to Charlie Byrd material it's just perfect in volume level but when I go to other material it's just too low for me.
Edits: 09/27/16
"...when I go to other material it's just too low for me."
Is the volume to low for you even when you turn the volume control all the way up?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
My preamp all the way up. Out of all my amps used with this preamp which is a BAT VK-30. The preamp has new 6H23's in it too. I could turn it all the way but never had to in the past or even anywhere close to all the way up. This is the first amp I will have to push the preamp close to all the way up and never had to cross past the half way point to get a good satisfactory volume level.
It's not really bad, just need maybe a 2db gain to put we're it was before with my other amps. The sound of this amp is wonderful and I'm really enjoying it. If I had 93-94db. Efficient speakers,this would not be an issues.
So far from the responses I'm getting, I will just have to live with this.
What I was really getting at was this, when you said "...when I go to other material it's just too low for me." what did you mean?
(edit, I see now that you meant compared to the way it was)
If the sound volume in the room is too low, then just turn up the volume control.
My point is, it's not to low for you if you can turn up the volume control and get the volume you want.
It's only "too low for you" when you can't get the volume in the room you want even with the volume control turned all the way up.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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