A is fine.
Not so much for overbiased AB
which is what I figured it was and later noted
by other comments.
Playing around with A circuits is actually
fun and a bit of a twist.
Adding strange things to amps like " tesla coils "
even water cooling etc etc. Are always fun , somewhat
rebellious in a way . Stirs up peoples
emotions. Much like art can stir up emotions as well.
And take the amp for what it is regardless.
Fun thread, DIY guys likely not spending 70k on
a amplifier.
I wonder if the bag of loose screws somewhere in the middle helps in that respect 🤣
It´s actually shameful, being a dane, when these type of pruducts (and their price point) comes under some
qualified investigation.
If in doubt, take a look at their cables and the connected marketing lies/pseudobabble.
And Class-A it´s definitely NOT.
They can´t even spell, how their "tesla-coils" are made. According to their website, their coils are "wounded" (not wound).
I think, everybody that´s ever been hit by a car, know what wounded means 🤣
Those Audiophools, where money is not an issue, get fooled every time. I realy pity them.
qualified investigation.
If in doubt, take a look at their cables and the connected marketing lies/pseudobabble.
And Class-A it´s definitely NOT.
They can´t even spell, how their "tesla-coils" are made. According to their website, their coils are "wounded" (not wound).
I think, everybody that´s ever been hit by a car, know what wounded means 🤣
Those Audiophools, where money is not an issue, get fooled every time. I realy pity them.
Their "anti-aerial resonance coils" are what proves them to be highly evolved snake oil producers. They are not even creative, they copied the "high end chips" you stick on the outside of anything to improve the performance.
If your customers are people that do not work for the money they spend, you can be quite succesfull with such "Danish technology for the stupid". You don't need to sell 50 well build amps to make a living, just selling one 70.000$ voodoo amp and you got the same profit. They can pay reviewers much more than any honest Entrepreneur. The usual "keep the test object" doesn't cost them a fraction of the 100 times overpriced retail. How much technical education do you expect from a drug lord, Communist party member or the like? Just look what gigantic criminal industry the internet has created. These people want to spend money for useless status symbols, the more, the better! Africa is loosing it's most iconic animals, just because such rich idiots want to powder their testicles with them.
If your customers are people that do not work for the money they spend, you can be quite succesfull with such "Danish technology for the stupid". You don't need to sell 50 well build amps to make a living, just selling one 70.000$ voodoo amp and you got the same profit. They can pay reviewers much more than any honest Entrepreneur. The usual "keep the test object" doesn't cost them a fraction of the 100 times overpriced retail. How much technical education do you expect from a drug lord, Communist party member or the like? Just look what gigantic criminal industry the internet has created. These people want to spend money for useless status symbols, the more, the better! Africa is loosing it's most iconic animals, just because such rich idiots want to powder their testicles with them.
Only a single connection to a coil? There's no way for it to conduct a current, since it looks open-circuit. At analog audio frequencies, there will be no antenna-like effects that could alter sound quality in any way. My pet boa sniffs at such goings-on. I agree with her; so do I.
Why is everyone only looking at the most expensive amp with Tesla coils? They also have the AXXESS Forte 1. Still pricey at 5k but much more affordable. Not to say that it works, just curious.
I don't understand how a Tesla coil would be used in an amplifier. What's meant by 'Tesla coil' in that application?
Aavik I-880:
Only four? Make it 42 and we'll talk.
Ansuz, which apparently is more of the same BS from the same BS company, sells a 3m power cable for only $65k and 2x3m speaker cable for $62k. Børresen, one of the ******** behind this, makes a set of speakers that retail for $540k. Throw in a Aavik streamer full of coils too at $71k and you're golden.
Only four? Make it 42 and we'll talk.
Ansuz, which apparently is more of the same BS from the same BS company, sells a 3m power cable for only $65k and 2x3m speaker cable for $62k. Børresen, one of the ******** behind this, makes a set of speakers that retail for $540k. Throw in a Aavik streamer full of coils too at $71k and you're golden.
Perhaps they're talking about the guy who made their coils (Fred Tesla the well known artisan coil maker) and not Nikola Tesla. It's just an unfortunate and unforseen coincidence they share the same name.
Hey guys. Interesting topic title.
About 8 or 9 years ago I already built an amplifier using inductance for compensation. Moreover, inductance is really used in audio amplifiers in input circuits. But there are some conditions for their use - for transistors this is a cascode circuit and the rating of this inductor I used is no more than 100 μH, and naturally it comes with a core. Making such an inductance without a core is certainly an attractive idea, but calling it a Tesla coil somehow never occurred to me, hmm...
The implementation of inductive compensation in the input circuit is very similar, to improve linearity, and the use of bidirectional winding means that this compensation is grounded to the GND from a low-resistance point. Not the best solution, but impressed by the no-compromise solution))).
About 8 or 9 years ago I already built an amplifier using inductance for compensation. Moreover, inductance is really used in audio amplifiers in input circuits. But there are some conditions for their use - for transistors this is a cascode circuit and the rating of this inductor I used is no more than 100 μH, and naturally it comes with a core. Making such an inductance without a core is certainly an attractive idea, but calling it a Tesla coil somehow never occurred to me, hmm...
The implementation of inductive compensation in the input circuit is very similar, to improve linearity, and the use of bidirectional winding means that this compensation is grounded to the GND from a low-resistance point. Not the best solution, but impressed by the no-compromise solution))).
Attachments
I would avoid coils in the input section at any rate.
They will spoil S/N due to magnetic hum pickup.
They will spoil S/N due to magnetic hum pickup.
ok, but how does this solution differ from using an input transformer? I had it 5:1, the amplifier input was low impedance and yes, the transformer was shielded by Goss Band and additional screen winding.
I would not use input transformers as well - they are rare, expensive and spoil performance in terms of frequency response and THD.😉
I once used an RLC circuit with hand-wound air-core inductors in the line level section of a preamplifier. It was always humming, due to inductors picking up hum from the EI power supply transformer.
Much more recently, I used an LC filter with air-gapped potcores for the reconstruction filter of a DAC with two toriodal supply transformers. I didn't hear any hum at all when I listened to the noise floor.
I think "will spoil S/N due to magnetic hum pickup" is a bit of an overstatement, but depending on the type of inductor, they certainly might pick up too much hum.
Much more recently, I used an LC filter with air-gapped potcores for the reconstruction filter of a DAC with two toriodal supply transformers. I didn't hear any hum at all when I listened to the noise floor.
I think "will spoil S/N due to magnetic hum pickup" is a bit of an overstatement, but depending on the type of inductor, they certainly might pick up too much hum.
Here is the simulation (see attachment) - I will assemble the amplifier itself.
Attachments
A closed magnetic circuit like a pot core or a toroid are much less prone to hum pickup. But hey, with my sound card I see hum residuals below -100dBV
