Aleph Power Output Stage & Halcro Error Correction Front End - what about this ??

[tiefbassuebertr]

Single ended output power stage include Halcro error correction:
Exist such an approach already as a diy project or as a commercial product?

Thank you for advices.


some URLs:
halcro amplifier
SoundStage! Ultra Audio - Halcro dm58 Mono Amplifiers: A Whole New World from Down Under (6/2002)
Halcro dm38 power amplifier | Stereophile.com
UcD400 listening vs. Halcro & Gamut
Halcro

[Zen Mod]

1. you are trying to mix two extremes - efficient SE , and error correction
2.that's more issue for Solid State forum ; if you take a good look in recent happenings here at Papaland , everything is going in direction of invoking proper ratio of harmonics in THD spectra , not in killing all THD

[tiefbassuebertr]

Originally Posted by Zen Mod

1. you are trying to mix two extremes - efficient SE , and error correction
2.that's more issue for Solid State forum ; if you take a good look in recent happenings here at Papaland , everything is going in direction of invoking proper ratio of harmonics in THD spectra , not in killing all THD

This I know all.

Single ended Class A mode eliminates most of the higher order and all complex components - thus for such an error correction it is an easy task to reduce all low order THD components from the single ended output stage down to rather immeasurable values.

With help of such an amplifier (i. e. SE output power & Halcro error correction) it is possible, which exactly audible effect is perceived while a listening test in case of completly absense of any THD and in case of the presence from a proper ratio THD, consists of mainly second/third order harmonics.

Perhaps one of the member have already investigate this (much more helpful than the endless debates concerning the sonic character of various amplifiers with completly various topologies and different boundary conditions like various solutions for PS-transformers/rectifiers/caps and GND management/earth wiring).

In the moment I observe two main groups of guys resp. two opposite kind of claims:

1) Good sound is only to achieve, if all THD components (i. e. even low order like second order) are extremly low - at best immeasurable values. In other case the reproduction sounds beautiful and more musical, but less realistic.

2) Good sound is only to achieve, if additional a certain degree of low order THD is present, because otherwise an audible over-analytic impression so as harshness (particularly by hard spoken "S") is perceived as a nuisance.