I'm not sure whether this is an accurate schematic or not.
I try not to do tweeter whispering.It's not popping, it's more of rushing sound. My friends says "it's nothing" since it's only audible with your ear placed against the speaker.
Am I over-reacting? I can get new tubes but I'm going to wait and see how it goes for a few days, then maybe have it looked at by my tech if I am still not happy, and let them decide if it needs tubes or not.
Again, why do you need the preamp in the first place?It's not popping, it's more of rushing sound. My friends says "it's nothing" since it's only audible with your ear placed against the speaker.
Am I over-reacting? I can get new tubes but I'm going to wait and see how it goes for a few days, then maybe have it looked at by my tech if I am still not happy, and let them decide if it needs tubes or not. Also I will mention the mod SIY has talked about.
Also the sound could be from system matching. My amps are 100 watts x 4 so lots of power to amplify the inherent noise of the pre.
I don't like the sound as much from DAC alone, even my Schiit Saga S sounds better than no pre-amp.Again, why do you need the preamp in the first place?
IF that's accurate, the 470R are grid stoppers. That's a bit low (I'd use at least 1k) but the important thing is in the layout- are they physically right at the pins?I'm not sure whether this is an accurate schematic or not.
A preamp isn't going to do diddly for that. It would be a ton cheaper and more effective to do some software EQ.I don't like the sound as much from DAC alone, even my Schiit Saga S sounds better than no pre-amp.
I try not to do tweeter whispering.
Does it sound OK or not?
I’d be interested to try @SIY grid resistor thing.
Don;t understand the circuits, but it sounds easy.
That is much more likely to be an illusion rather than reality. The distortion in those circuits is almost never high enough to provide an audible coloration.I do sense a bit of tube distortion, harmonics, etc.
Well, the company is called "Audible Illusions."That is much more likely to be an illusion rather than reality.
Or the illusion that there's any tube sound.I love the glorious tube sound
You've made your point multiple times now. Probably time to cut the guy some slack.Or the illusion that there's any tube sound.
I appreciate your service as hall monitor.You've made your point multiple times now. Probably time to cut the guy some slack.
He wanted to experience a tube preamp in his system. Nothing wrong with that.
Thanks, not sure why he is picking on me because I liked the sound.You've made your point multiple times now. Probably time to cut the guy some slack.
He wanted to experience a tube preamp in his system. Nothing wrong with that.
You haven’t done the basic checks needed to see if there IS an actual “sound.” Beyond the noise from oscillation, that is. What I’m trying to do is help keep you from pouring money down a useless hole.Thanks, not sure why he is picking on me because I liked the sound.
Hum is usually a grounding issue. Bad power supply caps usually give more of a buzzy noise.
I don't know what the result will be. It does sound like your pre might have some issues. Suppose the tech fixes the PSU or other issues and you get it back. Now quiet, functioning properly etc what if it has no identifiable sound quality? I think SIY's point that it probably doesn't have a sound if functioning properly is not so extreme.Thanks, not sure why he is picking on me because I liked the sound.
I dropped the unit off at the technician’s place. Changing the tubes removed the hiss but the hum, particularly in the left side, is still there. I explained this to the tech. I believe it’s old caps in the psu. I’m hoping he changes them and fixes the issue, but he said he will check out everything. He is familiar with these amps. The tube guy who sold me the Siemens and Valvo gold pin 6922’s used to sell these amps, and recommended this technician.
Would hitting the mute button on the pre before shutdown remove the danger?I don't know what the result will be. It does sound like your pre might have some issues. Suppose the tech fixes the PSU or other issues and you get it back. Now quiet, functioning properly etc what if it has no identifiable sound quality? I think SIY's point that it probably doesn't have a sound if functioning properly is not so extreme.
Here are measurements done by Stereophile for a Modulus 3A.
Audible Illusions Modulus 3A preamplifier Measurements
Sidebar 3: Measurements Line-level measurements of the Audible Illusions were taken from the CD inputs to the main outputs; the phono measurements were taken at the tape outputs. The Modulus 3's output impedance at its line output measured 1775 ohms (L) and 1802 ohms (R) with the level controls...www.stereophile.com
There not a lot there to make you think it has much of a sound. They do note moderate levels of DC output and that they fluctuate considerably. Maybe why you have gotten the pops on your amps at times when turning them off. They also show a rather high output impedance which might dull the sound a bit with some cables.
Tubes, Tubes, TUBES! They have great musical sound.......or so goes the myth. Just put tubes in the signal path and you might like it. You probably will like it better. I used tubes for years, and years. Tube power amps have a sound. Tube pre amps, not so much. SS pre amps not so much. So many want that tube sound and think a tube preamp gets that without the hassle of a tube power amp. Sorry, it very rarely is so.
Now if you just like the idea nothing wrong with that. But you seem to be suffering lots of trouble to gain something that is based upon a myth. SIY is actually trying to help you out.
So the Saga is going to be inaudible PERIOD! If you had a DAC with the right output level, you could insert the Saga or insert a cable. No difference you'll hear.Would hitting the mute button on the pre before shutdown remove the danger?
I’m sure a good solid state pre would be wonderful too. But one difference might be how I would use them with my dac. With the Modulus 2C, I kept the two volume controls at the same level and adjusted the volume with my dac. But with other pre amps that have a remote I generally won’t do that.
I will also say my Schiit Saga S sounds much cleaner and is very quiet, but feels anemic thin and lacking in body.