At 86dB sensitivity that would be asking an awful lot of a 10 watt amp. OTOH, if you traded them in for one of Magnepan's biampable models you could use it for the highs and produce loads of clean music that would make you think angels are singing live, in your room.
😀
I know it's a stretch that I will win the lottery. I really want to try this one though because I want to see if it can behave close to a tube amp for some bright Klipsch speakers I have that have a 97dB sensitivity. I have been trying to find alternative SIT/VFETS for this so I can put one together. I will search the forums, but if someone has links to alternatives off the top of their head I would greatly appreciate it.
Also, this would be my first build from scratch. Have repaired an NAD, Parasound and Kenwood for my own use. But I want to know more about amp internals.
Also, this would be my first build from scratch. Have repaired an NAD, Parasound and Kenwood for my own use. But I want to know more about amp internals.
If you look at the graphs it looks like this amp is good for 10w with an 8 ohm load and only 7w with a 4 ohm load and in the case of that 4 ohm load that 7W is at 6% distortion ! One other thing about those magie 1.7 speakers that 86 db/w sensitivity may be misleading if you correct for it being 4 ohms it's probably only 83db/W.
Yeah, it seems this particular version really is better suited for the 8 ohm, high-sensitivity speakers. If I had Maggies, or modern 4 ohm speakers, I don't believe I'd be as excited for this particular kit, and would be waiting to see what Papa is cookin wrt the Tokin kits. But, I'm a fan of horns, so here I am... A SE Class A fan. 🙂
Welcome 🙂
Yeah. Tomorrow will be chaos. I'll split off any posts from this thread that haven't been discussing the amplifier itself into a lottery discussion thread.
The VFET amp may have a flaw.
The design of this amp may have a flaw.
I will discuss the flaw after the lottery and they
are all sold. This amp has a beautiful chassis.
But the flaw cannot be fixed without a complete
redesign.
The design of this amp may have a flaw.
I will discuss the flaw after the lottery and they
are all sold. This amp has a beautiful chassis.
But the flaw cannot be fixed without a complete
redesign.
I have created a seperate thread to discuss anything to do with the lottery, rather than the amp:
DIY Sony VFET lottery discussion
It contains updated information about how to enter the lottery (namely, please load diyaudio.com/vfet before the window opens, and chill).
Previous posts about the lottery from this thread will be slowly moved over to that one slowly at time goes on.
You are welcome to make test posts in that thread.
It takes a lot of bravery to accuse Nelson Pass of malpractice. I hope your qualifications are able to withstand careful, vigorous scrutiny.
I think that is an incredible competitive tactic at work there....
IF it's flawed—it's flawed to audio perfection—that's after listening to it all day—up against the likes of M2X.
Good luck to everyone!
IF it's flawed—it's flawed to audio perfection—that's after listening to it all day—up against the likes of M2X.
Good luck to everyone!
"But the flaw cannot be fixed without a compete redesign."
In all seriousness, would you care to elaborate? Or not? Is it a critical flaw, such as something that will burn 1 in 180 houses down? Is it a mathematical flaw where the numbers of volts, amps, %THD, or dimensions have been calculated or measured incorrectly? Or is it opinion?
You said what you said, so out with it then.
I am asking because a post like the one you made (even without presenting evidence) may have a negative effect on participation in the lottery that is coming up in a couple of days. Publically stating what you posted will definitely cause some level inhibition or discouragement of participation.
You are dealing with a community of people who are each in their own unique income/savings situations. These same people are spending money during a economically unusual period in time. That is their choice and adults will make the best decision based on information, emotion, and finances.
You are also dealing with some people who are of varying degrees of flexibility, skill, knowledge, and experience.
I am just diy'er who enjoys building amplifiers having passed prototype stage. It is not a cheap hobby, it is a hobby that not for everyone, it is a hobby that can range from frustrating to stress relieving anywhere from the start of gathering the BOM to the final power up, but it is one I enjoy when the music comes on. I am definitely not a designer or engineer. That is the amount of skin I have in this game, but I do have my limits. Think about what you just said up there.
edit: before anyone wonders out loud, I am not taking sides. Not the side of Nelson Pass, Zen Mod, 6L6, or Jason. I am concerned for my own side and the average diyaudio denizen.
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The amp has been tested. Let’s be calm and not get worked up over one post. The phrasing of the post is such that it illicits a response. Let’s not get sucked into the trap.
Seems like a transparent attempt to manipulate participation. I'd bet money that user will enter the lottery
Sure. And most of the people who've waited patiently for 3 years will reconsider participating in the lottery thereby giving you a better chance of winning. What a devious plot! 😀
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No, don't get me wrong. I am not getting sucked into the trap, but if a statement like that can be made, well then -- cards in the table.
I am in a comfortable position financially, the bills are paid, the kids are well sheltered but $500 USD is money that can be spent on other things like adding to investments or used towards other hobbies (diy synth and building a PC currently ars not a cheap hobbies either) and projects.
This Sony VFET amplifier would fall into the category of "nice to have and enjoy", so winning the lottery of 1 in 180 versus thousands of entries would be a nice feeling... but having someone say something that makes me think twice about it, well that isn't very nice.
I am in a comfortable position financially, the bills are paid, the kids are well sheltered but $500 USD is money that can be spent on other things like adding to investments or used towards other hobbies (diy synth and building a PC currently ars not a cheap hobbies either) and projects.
This Sony VFET amplifier would fall into the category of "nice to have and enjoy", so winning the lottery of 1 in 180 versus thousands of entries would be a nice feeling... but having someone say something that makes me think twice about it, well that isn't very nice.
He's not a troll. The design flaw is the limited number that can be produced. Nothing to do with the circuitry. He's playing you guys.
Move on nothing to see here.
Move on nothing to see here.