remember good iron like standard lundhal sound good vs top amorphous EU OPT ,that I have
With a total weight of just 2,5kg i doubt this is the transformer people are looking for. High copper losses, not 20Hz full power and also it can't handle 300mA, just 185mA bias current.
I bet this transformer will sound thin. You need at least a core with 2,5kg
That would be to expensive, just shipment USA -Europe cost to much. A reasonable priced costum transformer for this project could cost under 350euro (ex shipment)
Within EU, the price is net, with VAT of origin of trade country (or destination country if it's better).
The import (mainly/primarily form abroad -not EU-) is costly (minimal custom), the VAT is valid for price+shipping.
This price is comparable to EU made products, so the price isn't cheap.
I'm not a fan of Lundahl, but this products made by manufacturer, which products components with accepted quality.
Is noname chinese "manufacturer" do the same?
You probably meant 400 Euro a piece.
Nobody I know uses the amp they build for more than 2 years ...so much for a life
There are certain objective characteristics of audio transformer quality, such as inductance, winding self-capacitance, leakage inductance, magnetic properties of core material, frequency response, etc. These characteristics can be measured with simple equipment.
The know-how of transformer design is not secret., although some manufacturers would like their customers to believe that their stuff is somehow special, not like anyone else's because it is made with some secret recipe. Such claims should be always taken with caution, unless there is clear technical explanation. Not obfuscation, something like "proprietary winding technique" or magic inobtanium materials.
The know-how of transformer design is not secret., although some manufacturers would like their customers to believe that their stuff is somehow special, not like anyone else's because it is made with some secret recipe. Such claims should be always taken with caution, unless there is clear technical explanation. Not obfuscation, something like "proprietary winding technique" or magic inobtanium materials.
I have read claims like this: "we use M6 steel because we have found that it sounds better than amorphous", or "we use tar as potting compound because it provides better mechanical damping". C'mon, guys, you use these materials because they are cheap.
Amorphous and M6 might have different characteristic. I would not say which one is better, but it might depend on your application.
Potted transformer is better (at least for me). Been there myself comparing both.
I'm exploring Finemet now, which somehow I feel better balanced vs Amorphous. I love Permalloy most (Tamura F7xxx) but now no more...
Potted transformer is better (at least for me). Been there myself comparing both.
I'm exploring Finemet now, which somehow I feel better balanced vs Amorphous. I love Permalloy most (Tamura F7xxx) but now no more...
This is not so fuzzy.
Amorphous hysteresis 1% of M6. Since transformer distortion at higher frequencies is largely due to hysteresis, for mids and highs amorphous is superior in all applications.
Amorphous lamination thickness is 20 um; the best steel is 250 um. This means much less Eddy current loss and superior performance at higher frequencies for the amorphous.
The only area where steel is better is Bmax. This means that for the same low frequency performance, amorphous transformer must be substantially larger.
By "amorphous" I mean all different varieties of thin film material produced by extremely rapid cooling of molten magnetic alloys. This includes nanocrystalline, Finemet, Vitroperm, Metglas, etc. They all share common properties of high permeability, low hysteresis, and low magnetostriction.
I would say "superior" from technical aspect. Application wise, in audio, there are a lot of other factors.
No comment on the rest. You are technically correct.
No comment on the rest. You are technically correct.
nope last year are at 400pair....this days the price skyrocket but for all unlucky
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Correct, I missed the word "standard " being concerned with AM series which are almost double in cost .
yep my 5kg amorphous are quite delusions what I gains in higher frequencies is lost in da bass vs ll1623 ,thats on EML300BXL .
better put money on good caps
Although amorphous cores have many benefits above SiFe cores I see a lot bad designed amorphous transformers. They sound thinner then "normal" transformers. If that's what people think about amorphouse transformers i know they have the wrong design.....
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So you bought the wrong designed transformer if you loose bass. A lot designers not fully understand the amorphous core and just swap cores and if they make costum designs most of them still not understand what a amorphous core can or not can do. I have seen swapped cores at Lundahl, Tribute , Monolith Magnetics
Which manufacturer you have? And what kind of transformer?